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Linux 3.14 compat: IO acct, global_page_state, etc

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generic_start_io_acct/generic_end_io_acct in the master
branch of the linux kernel requires that the request_queue
be provided.

Move the logic from freemem in the spl to arc_free_memory
in arc.c. Do this so we can take advantage of global_page_state
interface checks in zfs.

Upstream kernel replaced struct block_device with
struct gendisk in struct bio. Determine if the
function bio_set_dev exists during configure
and have zfs use that if it exists.

bio_set_dev https://github.com/torvalds/linux/commit/74d4699
global_node_page_state https://github.com/torvalds/linux/commit/75ef718
io acct https://github.com/torvalds/linux/commit/d62e26b

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Closes #6635
This commit is contained in:
Giuseppe Di Natale
2017-09-16 11:00:19 -07:00
committed by Brian Behlendorf
parent 90cdf2833d
commit 787acae0b5
7 changed files with 112 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-generic_io_acct.m4
+31 -4
View File
@@ -4,8 +4,8 @@ dnl #
dnl # torvalds/linux@394ffa503bc40e32d7f54a9b817264e81ce131b4 allows us to
dnl # increment iostat counters without generic_make_request().
dnl #
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
AC_MSG_CHECKING([whether generic IO accounting symbols are avaliable])
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT_3ARG], [
AC_MSG_CHECKING([whether 3 arg generic IO accounting symbols are available])
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/bio.h>
@@ -18,8 +18,35 @@ AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
generic_end_io_acct(0, NULL, 0);
], [generic_start_io_acct], [block/bio.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_IO_ACCT, 1,
[generic_start_io_acct()/generic_end_io_acct() avaliable])
AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1,
[generic_start_io_acct()/generic_end_io_acct() available])
], [
AC_MSG_RESULT(no)
])
])
dnl #
dnl # Linux 4.14 API,
dnl #
dnl # generic_start_io_acct/generic_end_io_acct now require request_queue to be
dnl # provided. No functional changes, but preparation for inflight accounting
dnl #
AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT_4ARG], [
AC_MSG_CHECKING([whether 4 arg generic IO accounting symbols are available])
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/bio.h>
void (*generic_start_io_acct_f)(struct request_queue *, int,
unsigned long, struct hd_struct *) = &generic_start_io_acct;
void (*generic_end_io_acct_f)(struct request_queue *, int,
struct hd_struct *, unsigned long) = &generic_end_io_acct;
], [
generic_start_io_acct(NULL, 0, 0, NULL);
generic_end_io_acct(NULL, 0, NULL, 0);
], [generic_start_io_acct], [block/bio.c], [
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_GENERIC_IO_ACCT_4ARG, 1,
[generic_start_io_acct()/generic_end_io_acct() 4 arg available])
], [
AC_MSG_RESULT(no)
])