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| author |   NeilBrown <neilb@suse.de> | 2014-09-25 13:55:19 +1000 |
|---|---|---|
| committer |   Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-25 08:23:57 -0400 |
| commit | cbbce82209490df8b68da9aec0d642451fe0a668 (patch) | |
| tree | 0c8d643c6bc34332c8b00300a6440f87701039c3 /include/linux/pagemap.h | |
| parent | NFS: don't use STABLE writes during writeback. (diff) | |
| download | linux-dev-cbbce82209490df8b68da9aec0d642451fe0a668.tar.xz linux-dev-cbbce82209490df8b68da9aec0d642451fe0a668.zip | |
SCHED: add some "wait..on_bit...timeout()" interfaces.
In commit c1221321b7c25b53204447cff9949a6d5a7ddddc
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>
Diffstat (limited to 'include/linux/pagemap.h')
| -rw-r--r-- | include/linux/pagemap.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 3df8c7db7a4e..87f9e4230d3a 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -502,6 +502,8 @@ static inline int lock_page_or_retry(struct page *page, struct mm_struct *mm, extern void wait_on_page_bit(struct page *page, int bit_nr); extern int wait_on_page_bit_killable(struct page *page, int bit_nr); +extern int wait_on_page_bit_killable_timeout(struct page *page, + int bit_nr, unsigned long timeout); static inline int wait_on_page_locked_killable(struct page *page) { |