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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2017-05-03 14:56:06 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-03 15:52:12 -0700 |
| commit | 32691f0fbe41a52eee811496205dc4828991b399 (patch) | |
| tree | e9747a18397416d1ac5d7104d3cfb220b4e8ef13 /samples/watchdog | |
| parent | a5f6a6a9c72eac38a7fadd1a038532bc8516337c (diff) | |
| download | linux-32691f0fbe41a52eee811496205dc4828991b399.tar.gz linux-32691f0fbe41a52eee811496205dc4828991b399.tar.bz2 linux-32691f0fbe41a52eee811496205dc4828991b399.zip | |
mm/truncate: bail out early from invalidate_inode_pages2_range() if mapping is empty
If mapping is empty (both ->nrpages and ->nrexceptional is zero) we can
avoid pointless lookups in empty radix tree and bail out immediately
after cleancache invalidation.
Link: http://lkml.kernel.org/r/20170424164135.22350-4-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Alexey Kuznetsov <kuznet@virtuozzo.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Nikolay Borisov <n.borisov.lkml@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'samples/watchdog')
0 files changed, 0 insertions, 0 deletions