Messages in this thread | | | Date | Thu, 19 Oct 2017 00:28:04 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH] f2fs: limit # of inmemory pages |
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On Wed, Oct 18, 2017 at 07:15:16PM -0700, Jaegeuk Kim wrote: > If some abnormal users try lots of atomic write operations, f2fs is able to > produce pinned pages in the main memory which affects system performance. > This patch limits that as 20% over total memory size, and if f2fs reaches > to the limit, it will drop all the inmemory pages.
Can you please document your "atomic" writes and how they pin memory in a mail to linux-abi? And how they compare to my O_ATOMIC implement as well as the papers it is based on?
I tried to take a quick look at the code and it looks very bogus to me in addition to being sneaked in through fs-specific ioctls without any review whatsoever.
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