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Add backing_device_info per-filesystem

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For a long time now the kernel has been moving away from using the
pdflush daemon to write 'old' dirty pages to disk.  The primary reason
for this is because the pdflush daemon is single threaded and can be
a limiting factor for performance.  Since pdflush sequentially walks
the dirty inode list for each super block any delay in processing can
slow down dirty page writeback for all filesystems.

The replacement for pdflush is called bdi (backing device info).  The
bdi system involves creating a per-filesystem control structure each
with its own private sets of queues to manage writeback.  The advantage
is greater parallelism which improves performance and prevents a single
filesystem from slowing writeback to the others.

For a long time both systems co-existed in the kernel so it wasn't
strictly required to implement the bdi scheme.  However, as of
Linux 2.6.36 kernels the pdflush functionality has been retired.

Since ZFS already bypasses the page cache for most I/O this is only
an issue for mmap(2) writes which must go through the page cache.
Even then adding this missing support for newer kernels was overlooked
because there are other mechanisms which can trigger writeback.

However, there is one critical case where not implementing the bdi
functionality can cause problems.  If an application handles a page
fault it can enter the balance_dirty_pages() callpath.  This will
result in the application hanging until the number of dirty pages in
the system drops below the dirty ratio.

Without a registered backing_device_info for the filesystem the
dirty pages will not get written out.  Thus the application will hang.
As mentioned above this was less of an issue with older kernels because
pdflush would eventually write out the dirty pages.

This change adds a backing_device_info structure to the zfs_sb_t
which is already allocated per-super block.  It is then registered
when the filesystem mounted and unregistered on unmount.  It will
not be registered for mounted snapshots which are read-only.  This
change will result in flush-<pool> thread being dynamically created
and destroyed per-mounted filesystem for writeback.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #174
This commit is contained in:
Brian Behlendorf 2011-08-01 18:24:40 -07:00
parent 3c0e5c0f45
commit 76659dc110
61 changed files with 255 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Makefile.in
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@ -56,6 +56,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/mount_zfs/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/sas_switch_id/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zdb/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zfs/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zinject/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zpios/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zpool/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zpool_id/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zpool_layout/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/ztest/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
cmd/zvol_id/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

18
config/kernel-bdi.m4 Normal file
View File

@ -0,0 +1,18 @@
dnl #
dnl # 2.6.32 API change
dnl # Private backing_device_info interfaces available
dnl #
AC_DEFUN([ZFS_AC_KERNEL_BDI], [
AC_MSG_CHECKING([whether super_block has s_bdi])
ZFS_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
struct super_block sb __attribute__ ((unused));
sb.s_bdi = NULL;
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_BDI, 1, [struct super_block has s_bdi])
],[
AC_MSG_RESULT(no)
])
])

1
config/kernel.m4
View File

@ -40,6 +40,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
ZFS_AC_KERNEL_TRUNCATE_SETSIZE
ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
ZFS_AC_KERNEL_MOUNT_NODEV
ZFS_AC_KERNEL_BDI
if test "$LINUX_OBJ" != "$LINUX"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"

132
configure vendored
View File

@ -14686,6 +14686,72 @@ _ACEOF
{ $as_echo "$as_me:$LINENO: checking whether super_block has s_bdi" >&5
$as_echo_n "checking whether super_block has s_bdi... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.c
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <linux/fs.h>
int
main (void)
{
struct super_block sb __attribute__ ((unused));
sb.s_bdi = NULL;
;
return 0;
}
_ACEOF
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_BDI 1
_ACEOF
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
fi
rm -Rf build
if test "$LINUX_OBJ" != "$LINUX"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
fi
@ -18956,6 +19022,72 @@ _ACEOF
{ $as_echo "$as_me:$LINENO: checking whether super_block has s_bdi" >&5
$as_echo_n "checking whether super_block has s_bdi... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.c
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <linux/fs.h>
int
main (void)
{
struct super_block sb __attribute__ ((unused));
sb.s_bdi = NULL;
;
return 0;
}
_ACEOF
rm -Rf build && mkdir -p build
echo "obj-m := conftest.o" >build/Makefile
if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
{ $as_echo "$as_me:$LINENO: result: yes" >&5
$as_echo "yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_BDI 1
_ACEOF
else
$as_echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
{ $as_echo "$as_me:$LINENO: result: no" >&5
$as_echo "no" >&6; }
fi
rm -Rf build
if test "$LINUX_OBJ" != "$LINUX"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
fi

1
dracut/90zfs/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
dracut/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
etc/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
etc/init.d/Makefile.in
View File

@ -44,6 +44,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
etc/udev/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
etc/udev/rules.d/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
etc/zfs/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/linux/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

19
include/linux/vfs_compat.h
View File

@ -62,4 +62,23 @@ truncate_setsize(struct inode *ip, loff_t new)
}
#endif /* HAVE_TRUNCATE_SETSIZE */
/*
* 2.6.32 API change,
* Added backing_device_info (bdi) per super block interfaces. When
* available a bdi must be configured when using a non-device backed
* filesystem for proper writeback. It's safe to leave this code
* dormant for kernels which only support pdflush and not bdi.
*/
#ifdef HAVE_BDI
#define bdi_get_sb(sb) (sb->s_bdi)
#define bdi_put_sb(sb, bdi) (sb->s_bdi = bdi)
#else
#define bdi_init(bdi) (0)
#define bdi_destroy(bdi) (0)
#define bdi_register(bdi, parent, fmt, args) (0)
#define bdi_unregister(bdi) (0)
#define bdi_get_sb(sb) (0)
#define bdi_put_sb(sb, bdi) (0)
#endif /* HAVE_BDI */
#endif /* _ZFS_VFS_H */

1
include/sys/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/sys/fm/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/sys/fm/fs/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/sys/fs/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
include/sys/zfs_vfsops.h
View File

@ -43,6 +43,7 @@ struct znode;
typedef struct zfs_sb {
struct super_block *z_sb; /* generic super_block */
struct backing_dev_info z_bdi; /* generic backing dev info */
struct zfs_sb *z_parent; /* parent fs */
objset_t *z_os; /* objset reference */
uint64_t z_flags; /* super_block flags */

1
lib/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libavl/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libefi/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libnvpair/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libshare/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/asm-generic/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/asm-i386/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/asm-x86_64/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/ia32/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/ia32/sys/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/rpc/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/sys/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/sys/dktp/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/sys/sysevent/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libspl/include/util/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libunicode/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libuutil/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libzfs/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
lib/libzpool/Makefile.in
View File

@ -43,6 +43,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
man/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
man/man8/Makefile.in
View File

@ -41,6 +41,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

27
module/zfs/zfs_vfsops.c
View File

@ -600,6 +600,12 @@ zfs_sb_create(const char *osname, zfs_sb_t **zsbp)
zsb->z_show_ctldir = ZFS_SNAPDIR_VISIBLE;
zsb->z_os = os;
error = -bdi_init(&zsb->z_bdi);
if (error) {
kmem_free(zsb, sizeof (zfs_sb_t));
return (error);
}
error = zfs_get_zplprop(os, ZFS_PROP_VERSION, &zsb->z_version);
if (error) {
goto out;
@ -799,6 +805,7 @@ zfs_sb_free(zfs_sb_t *zsb)
zfs_fuid_destroy(zsb);
bdi_destroy(&zsb->z_bdi);
mutex_destroy(&zsb->z_znodes_lock);
mutex_destroy(&zsb->z_lock);
list_destroy(&zsb->z_all_znodes);
@ -1077,6 +1084,10 @@ zfsvfs_teardown(zfs_sb_t *zsb, boolean_t unmounting)
return (0);
}
#ifdef HAVE_BDI
static atomic_long_t bdi_seq = ATOMIC_LONG_INIT(0);
#endif /* HAVE_BDI */
int
zfs_domount(struct super_block *sb, void *data, int silent)
{
@ -1102,6 +1113,7 @@ zfs_domount(struct super_block *sb, void *data, int silent)
sb->s_time_gran = 1;
sb->s_blocksize = recordsize;
sb->s_blocksize_bits = ilog2(recordsize);
bdi_put_sb(sb, NULL);
/* Set callback operations for the file system. */
sb->s_op = &zpl_super_operations;
@ -1126,6 +1138,16 @@ zfs_domount(struct super_block *sb, void *data, int silent)
dmu_objset_set_user(zsb->z_os, zsb);
mutex_exit(&zsb->z_os->os_user_ptr_lock);
} else {
/* Disable Linux read-ahead handled by lower layers */
zsb->z_bdi.ra_pages = 0;
error = -bdi_register(&zsb->z_bdi, NULL, "zfs-%d",
atomic_long_inc_return(&bdi_seq));
if (error)
goto out;
bdi_put_sb(sb, &zsb->z_bdi);
error = zfs_sb_setup(zsb, B_TRUE);
#ifdef HAVE_SNAPSHOT
(void) zfs_snap_create(zsb);
@ -1166,6 +1188,11 @@ zfs_umount(struct super_block *sb)
VERIFY(zfsvfs_teardown(zsb, B_TRUE) == 0);
os = zsb->z_os;
if (bdi_get_sb(sb)) {
bdi_unregister(bdi_get_sb(sb));
bdi_put_sb(sb, NULL);
}
/*
* z_os will be NULL if there was an error in
* attempting to reopen zsb.

1
scripts/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
scripts/zpios-profile/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
scripts/zpios-test/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
scripts/zpool-config/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

1
scripts/zpool-layout/Makefile.in
View File

@ -42,6 +42,7 @@ am__aclocal_m4_deps = \
$(top_srcdir)/config/always-no-unused-but-set-variable.m4 \
$(top_srcdir)/config/kernel-bdev-block-device-operations.m4 \
$(top_srcdir)/config/kernel-bdev-logical-size.m4 \
$(top_srcdir)/config/kernel-bdi.m4 \
$(top_srcdir)/config/kernel-bio-empty-barrier.m4 \
$(top_srcdir)/config/kernel-bio-end-io-t-args.m4 \
$(top_srcdir)/config/kernel-bio-failfast.m4 \

3
zfs_config.h.in
View File

@ -18,6 +18,9 @@
/* bdev_logical_block_size() is available */
#undef HAVE_BDEV_LOGICAL_BLOCK_SIZE
/* struct super_block has s_bdi */
#undef HAVE_BDI
/* bio_empy_barrier() is defined */
#undef HAVE_BIO_EMPTY_BARRIER