mirror_zfs/config/user.m4
Brian Behlendorf 63f3396233 Fix mmap / libaio deadlock
Calling uiomove() in mappedread() under the page lock can result
in a deadlock if the user space page needs to be faulted in.

Resolve the issue by dropping the page lock before the uiomove().
The inode range lock protects against concurrent updates via
zfs_read() and zfs_write().

Reviewed-by: Albert Lee <trisk@forkgnu.org>
Reviewed-by: Chunwei Chen <david.chen@nutanix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7335
Closes #7339
2018-05-07 17:19:57 -07:00

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dnl #
dnl # Default ZFS user configuration
dnl #
AC_DEFUN([ZFS_AC_CONFIG_USER], [
ZFS_AC_CONFIG_USER_MOUNT_HELPER
ZFS_AC_CONFIG_USER_UDEV
ZFS_AC_CONFIG_USER_SYSTEMD
ZFS_AC_CONFIG_USER_SYSVINIT
ZFS_AC_CONFIG_USER_DRACUT
ZFS_AC_CONFIG_USER_ZLIB
ZFS_AC_CONFIG_USER_LIBUUID
ZFS_AC_CONFIG_USER_LIBTIRPC
ZFS_AC_CONFIG_USER_LIBBLKID
ZFS_AC_CONFIG_USER_LIBUDEV
ZFS_AC_CONFIG_USER_FRAME_LARGER_THAN
ZFS_AC_CONFIG_USER_LIBAIO
ZFS_AC_CONFIG_USER_RUNSTATEDIR
ZFS_AC_CONFIG_USER_MAKEDEV_IN_SYSMACROS
ZFS_AC_CONFIG_USER_MAKEDEV_IN_MKDEV
ZFS_AC_CONFIG_USER_NO_FORMAT_TRUNCATION
ZFS_AC_TEST_FRAMEWORK
AC_CHECK_FUNCS([mlockall])
])
dnl #
dnl # Setup the environment for the ZFS Test Suite. Currently only
dnl # Linux sytle systems are supported but this infrastructure can
dnl # be extended to support other platforms if needed.
dnl #
AC_DEFUN([ZFS_AC_TEST_FRAMEWORK], [
ZONENAME="echo global"
AC_SUBST(ZONENAME)
AC_SUBST(RM)
])