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| author |   Brian Geffon <bgeffon@google.com> | 2022-10-03 10:48:32 -0400 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2022-10-12 18:51:50 -0700 |
| commit | 94541bc3fbde45bbd40e7989995246b22732679a (patch) | |
| tree | 2ffdc0f4f3fb09860a15bc1406ff7588c21ec394 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | LoongArch: update local TLB if PTE entry exists (diff) | |
| download | linux-dev-94541bc3fbde45bbd40e7989995246b22732679a.tar.xz linux-dev-94541bc3fbde45bbd40e7989995246b22732679a.zip | |
zram: always expose rw_page
Currently zram will adjust its fops to a version which does not contain
rw_page when a backing device has been assigned. This is done to prevent
upper layers from assuming a synchronous operation when a page may have
been written back. This forces every operation through bio which has
overhead associated with bio_alloc/frees.
The code can be simplified to always expose an rw_page method and only in
the rare event that a page is written back we instead will return
-EOPNOTSUPP forcing the upper layer to fallback to bio.
Link: https://lkml.kernel.org/r/20221003144832.2906610-1-bgeffon@google.com
Signed-off-by: Brian Geffon <bgeffon@google.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Rom Lemarchand <romlem@google.com>
Cc: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions