SCHED: add some "wait..on_bit...timeout()" interfaces.

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In commit c1221321b7
   sched: Allow wait_on_bit_action() functions to support a timeout

I suggested that a "wait_on_bit_timeout()" interface would not meet my
need.  This isn't true - I was just over-engineering.

Including a 'private' field in wait_bit_key instead of a focused
"timeout" field was just premature generalization.  If some other
use is ever found, it can be generalized or added later.

So this patch renames "private" to "timeout" with a meaning "stop
waiting when "jiffies" reaches or passes "timeout",
and adds two of the many possible wait..bit..timeout() interfaces:

wait_on_page_bit_killable_timeout(), which is the one I want to use,
and out_of_line_wait_on_bit_timeout() which is a reasonably general
example.  Others can be added as needed.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

...

This commit is contained in:

NeilBrown 2014-09-25 13:55:19 +10:00 • committed by Trond Myklebust

parent e87b4c7a7a

commit cbbce82209

4 changed files with 55 additions and 1 deletions

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2

include/linux/pagemap.h

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5

include/linux/wait.h

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36

kernel/sched/wait.c

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13

mm/filemap.c

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