* + writeback-simplify-wb_stat_sum.patch added to -mm tree
@ 2017-06-26 21:53 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2017-06-26 21:53 UTC (permalink / raw)
To: nborisov, a.p.zijlstra, axboe, jack, tj, mm-commits
The patch titled
Subject: include/linux/backing-dev.h: simplify wb_stat_sum
has been added to the -mm tree. Its filename is
writeback-simplify-wb_stat_sum.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/writeback-simplify-wb_stat_sum.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/writeback-simplify-wb_stat_sum.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Nikolay Borisov <nborisov@suse.com>
Subject: include/linux/backing-dev.h: simplify wb_stat_sum
wb_stat_sum() disables interrupts and calls __wb_stat_sum() which
eventually calls __percpu_counter_sum(). However, the percpu routine is
already irq-safe. Simplify the code a bit by making wb_stat_sum()
directly call percpu_counter_sum_positive() and not disable interrupts.
Also remove the now-uneeded __wb_stat_sum() which was just a wrapper over
percpu_counter_sum_positive().
Link: http://lkml.kernel.org/r/1498230681-29103-1-git-send-email-nborisov@suse.com
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/backing-dev.h | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff -puN include/linux/backing-dev.h~writeback-simplify-wb_stat_sum include/linux/backing-dev.h
--- a/include/linux/backing-dev.h~writeback-simplify-wb_stat_sum
+++ a/include/linux/backing-dev.h
@@ -104,22 +104,9 @@ static inline s64 wb_stat(struct bdi_wri
return percpu_counter_read_positive(&wb->stat[item]);
}
-static inline s64 __wb_stat_sum(struct bdi_writeback *wb,
- enum wb_stat_item item)
-{
- return percpu_counter_sum_positive(&wb->stat[item]);
-}
-
static inline s64 wb_stat_sum(struct bdi_writeback *wb, enum wb_stat_item item)
{
- s64 sum;
- unsigned long flags;
-
- local_irq_save(flags);
- sum = __wb_stat_sum(wb, item);
- local_irq_restore(flags);
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2017-06-26 21:53 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-06-26 21:53 + writeback-simplify-wb_stat_sum.patch added to -mm tree akpm
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.