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| author | Raphael S. Carvalho <raphael.scarv@gmail.com> | 2013-05-01 00:28:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-01 02:04:07 +0200 |
| commit | 8db049b3d666b3676ff4a976e03c14de302bf9fa (patch) | |
| tree | 74d5e5c8e25b451e983e66cb1e2a41cbf8e1b4f1 /kernel/pid_namespace.c | |
| parent | rbtree_test: add __init/__exit annotations (diff) | |
| download | linux-8db049b3d666b3676ff4a976e03c14de302bf9fa.tar.xz linux-8db049b3d666b3676ff4a976e03c14de302bf9fa.zip | |
kernel/pid.c: improve flow of a loop inside alloc_pidmap.
find_next_offset() searches for an available "cleaned bit" in the
respective pid bitmap (page), so returns the offset if found, otherwise
it returns a value equals to BITS_PER_PAGE.
For example, suppose find_next_offset didn't find any available bit, so
there's no purpose to call mk_pid (Wasteful Cpu Cycles).
Therefore, I found it could be better to call mk_pid after the checking
(offset < BITS_PER_PAGE) returned sucessfully! Another point: If (offset
< BITS_PER_PAGE) results in a "failure", then mk_pid would be called
again afterwards.
[akpm@linux-foundation.org: simplify code]
Signed-off-by: Raphael S. Carvalho <raphael.scarv@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/pid_namespace.c')
0 files changed, 0 insertions, 0 deletions