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author | Livio Soares <livio@eecg.toronto.edu> | 2007-12-18 09:21:13 -0500 |
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committer | Ingo Molnar <mingo@elte.hu> | 2007-12-18 09:21:13 -0500 |
commit | c7af77b584b02d3e321b00203a618a9c93782121 (patch) | |
tree | e7a8d5995e34065aa1bd610cb92684c5e5856119 /kernel/auditsc.c | |
parent | 051a1d1afa47206e23ae03f781c6795ce870e3d5 (diff) |
sched: mark rwsem functions as __sched for wchan/profiling
This following commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=fdf8cb0909b531f9ae8f9b9d7e4eb35ba3505f07
un-inlined a low-level rwsem function, but did not mark it as __sched.
The result is that it now shows up as thread wchan (which also affects
/proc/profile stats). The following simple patch fixes this by properly
marking rwsem_down_failed_common() as a __sched function.
Also in this patch, which is up for discussion, marks down_read() and
down_write() proper as __sched. For profiling, it is pretty much
useless to know that a semaphore is beig help - it is necessary to know
_which_ one. By going up another frame on the stack, the information
becomes much more useful.
In summary, the below change to lib/rwsem.c should be applied; the
changes to kernel/rwsem.c could be applied if other kernel hackers agree
with my proposal that down_read()/down_write() in the profile is not
enough.
[ akpm@linux-foundation.org: build fix ]
Signed-off-by: Livio Soares <livio@eecg.toronto.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/auditsc.c')
0 files changed, 0 insertions, 0 deletions