Mingming Cao wrote:
On Mon, 2008-06-02 at 09:19 +0900, Akira Fujita wrote:
Hi,
Mingming Cao wrote:
percpu counter: update center counter when sum per-cpu counter
From: Mingming cao <cmm@xxxxxxxxxx>
Delayed allocation need to check free blocks at every write time.
percpu_counter_read_positive() is not quit accurate
but using percpu_counter_sum_positive() for every write
frequently is quite expensive.
I couldn't compile the latest ext4 patch qeueu.
LD fs/ext3/ext3.o
LD fs/ext3/built-in.o
CC fs/ext4/balloc.o
fs/ext4/balloc.c: In function ‘ext4_has_free_blocks’:
fs/ext4/balloc.c:1629: error: implicit declaration of function ‘percpu_counter_sum_positive_set’
+ percpu_counter_sum_positive_set(&sbi->s_freeblocks_counter);
Maybe the above line which in percpucounter-add-sum-and-set-function.patch
is percpu_counter_sum_and_set(&sbi->s_freeblocks_couter).
oops. Updated patch queue, please check again.
I confirmed that I could compile the latest ext4 patch queue correctly.
Thanks. :-)
Regards,
Akira Fujita
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