On 07/14/2015 02:22 PM, Oleg Nesterov wrote:
>> Using my little write-1-byte test (under will-it-scale), your 4 patches
>> improves the number of writes/sec by 12%. My 3 patches improve the
>> number of writes/sec by 32%.
I looked at it again. I tested with this patch in addition to the ones
modifying __sb_start/end_write():
https://lkml.org/lkml/2015/6/24/682
That is where the performance delta came from. Your patches (plus the
fsnotify optimization) perform very similarly to my approach.
Yours remove so much code that I think they are the preferable approach.
They don't compile with lockdep on, btw. :)
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