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Re: [PATCH] jbd2: get rid of open coded allocation retry loop

From Theodore Ts'o <tytso@mit.edu>
Newsgroups linux.kernel
Subject Re: [PATCH] jbd2: get rid of open coded allocation retry loop
Date 2015-06-15 21:50 +0200
Message-ID <pBIym-4Ka-11@gated-at.bofh.it> (permalink)
References <pBDp0-5LO-19@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Mon, Jun 15, 2015 at 04:17:34PM +0200, Michal Hocko wrote:
> insert_revoke_hash does an open coded endless allocation loop if
> journal_oom_retry is true. It doesn't implement any allocation fallback
> strategy between the retries, though. The memory allocator doesn't know
> about the never fail requirement so it cannot potentially help to move
> on with the allocation (e.g. use memory reserves).
> 
> Get rid of the retry loop and use __GFP_NOFAIL instead. We will lose the
> debugging message but I am not sure it is anyhow helpful.
> 
> Do the same for journal_alloc_journal_head which is doing a similar
> thing.
> 
> Signed-off-by: Michal Hocko <mhocko@suse.cz>

Thanks, applied.

					- Ted
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Re: [PATCH] jbd2: get rid of open coded allocation retry loop Theodore Ts'o <tytso@mit.edu> - 2015-06-15 21:50 +0200
  Re: [PATCH] jbd2: get rid of open coded allocation retry loop Michal Hocko <mhocko@suse.cz> - 2015-06-15 22:00 +0200

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