zfs/include
Brian Behlendorf ad8dc99ed2 Linux 5.15 compat: block device readahead
The 5.15 kernel moved the backing_dev_info structure out of
the request queue structure which causes a build failure.

Rather than look in the new location for the BDI we instead
detect this upstream refactoring by the existance of either
the blk_queue_update_readahead() or disk_update_readahead()
functions.  In either case, there's no longer any reason to
manually set the ra_pages value since it will be overridden
with a reasonable default (2x the block size) when
blk_queue_io_opt() is called.

Therefore, we update the compatibility wrapper to do nothing
for 5.9 and newer kernels.  While it's tempting to do the
same for older kernels we want to keep the compatibility
code to preserve the existing behavior.  Removing it would
effectively increase the default readahead to 128k.

Reviewed-by: Tony Nguyen <tony.nguyen@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes 
2021-09-14 15:41:42 -07:00
..
os Linux 5.15 compat: block device readahead 2021-09-14 15:41:42 -07:00
sys Fix cross-endian interoperability of zstd 2021-09-14 15:05:55 -07:00
.gitignore OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
Makefile.am zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
cityhash.h Compile cityhash code into libzfs 2020-03-27 09:11:22 -07:00
libnvpair.h Add JSON output support to channel programs 2018-03-19 12:40:58 -07:00
libuutil.h Correct cppcheck errors 2017-09-19 12:17:29 -07:00
libuutil_common.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libuutil_impl.h Support custom build directories and move includes 2010-09-08 12:38:56 -07:00
libzfs.h Improvements to the 'compatibility' property 2021-04-14 13:23:08 -07:00
libzfs_core.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
libzfs_impl.h Add 'zfs rename -u' to rename without remounting 2020-09-01 16:14:16 -07:00
libzfsbootenv.h zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
libzutil.h Add prototypes 2020-06-18 12:21:32 -07:00
thread_pool.h Add libtpool (thread pools) 2017-08-09 15:31:08 -07:00
zfeature_common.h FreeBSD: disable edonr in zfs_mod_supported_feature() 2021-02-17 08:14:51 -08:00
zfs_comutil.h Fix "zpool add -n" for dedup, special and log devices 2020-01-06 15:40:06 -08:00
zfs_deleg.h Remove code for zfs remap 2019-06-24 16:44:01 -07:00
zfs_fletcher.h Add AVX512BW variant of fletcher 2019-10-30 12:26:14 -07:00
zfs_namecheck.h Implement bookmark copying 2020-02-11 13:19:12 -08:00
zfs_prop.h Add zfs module feature and property info to sysfs 2018-09-02 12:09:53 -07:00