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| author | Omar Sandoval <osandov@fb.com> | 2018-08-21 21:55:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:46 -0700 |
| commit | bf991c2231117d50a7645792b514354fc8d19dae (patch) | |
| tree | c7c74e6d467774e97be1a0022b26c1047a7465b8 /lib/test_string.c | |
| parent | 37e949bd5293ddb70acf236eedf2ae8caa1db57b (diff) | |
| download | linux-bf991c2231117d50a7645792b514354fc8d19dae.tar.gz | |
proc/kcore: optimize multiple page reads
The current code does a full search of the segment list every time for every page. This is wasteful, since it's almost certain that the next page will be in the same segment. Instead, check if the previous segment covers the current page before doing the list search. Link: http://lkml.kernel.org/r/fd346c11090cf93d867e01b8d73a6567c5ac6361.1531953780.git.osandov@fb.com Signed-off-by: Omar Sandoval <osandov@fb.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Bhupesh Sharma <bhsharma@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: James Morse <james.morse@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_string.c')
0 files changed, 0 insertions, 0 deletions