]> git.baikalelectronics.ru Git - kernel.git/commit
squashfs: migrate from ll_rw_block usage to BIO
authorPhilippe Liard <pliard@google.com>
Tue, 2 Jun 2020 04:45:23 +0000 (21:45 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 2 Jun 2020 17:59:05 +0000 (10:59 -0700)
commit6e5379b39086d4bedaceda17921cfdfc985d971d
tree2b94b6fb982fdbbed4400cbc0bbe3e1815c4b549
parent1e631534b3b3b489f6930ed8b6c5d12d94492312
squashfs: migrate from ll_rw_block usage to BIO

ll_rw_block() function has been deprecated in favor of BIO which appears
to come with large performance improvements.

This patch decreases boot time by close to 40% when using squashfs for
the root file-system.  This is observed at least in the context of
starting an Android VM on Chrome OS using crosvm.  The patch was tested
on 4.19 as well as master.

This patch is largely based on Adrien Schildknecht's patch that was
originally sent as https://lkml.org/lkml/2017/9/22/814 though with some
significant changes and simplifications while also taking Phillip
Lougher's feedback into account, around preserving support for
FILE_CACHE in particular.

[akpm@linux-foundation.org: fix build error reported by Randy]
Link: http://lkml.kernel.org/r/319997c2-5fc8-f889-2ea3-d913308a7c1f@infradead.org
Signed-off-by: Philippe Liard <pliard@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Adrien Schildknecht <adrien+dev@schischi.me>
Cc: Phillip Lougher <phillip@squashfs.org.uk>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Daniel Rosenberg <drosen@google.com>
Link: https://chromium.googlesource.com/chromiumos/platform/crosvm
Link: http://lkml.kernel.org/r/20191106074238.186023-1-pliard@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/squashfs/block.c
fs/squashfs/decompressor.h
fs/squashfs/decompressor_multi.c
fs/squashfs/decompressor_multi_percpu.c
fs/squashfs/decompressor_single.c
fs/squashfs/lz4_wrapper.c
fs/squashfs/lzo_wrapper.c
fs/squashfs/squashfs.h
fs/squashfs/xz_wrapper.c
fs/squashfs/zlib_wrapper.c
fs/squashfs/zstd_wrapper.c