From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Michel Lespinasse <walken@google.com>
Cc: kosaki.motohiro@jp.fujitsu.com,
lsf10-pc@lists.linuxfoundation.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>,
riel@redhat.com, Nick Piggin <npiggin@suse.de>
Subject: Re: [ATTEND][LSF/VM TOPIC] mmap_sem scalability and edge cases
Date: Mon, 5 Jul 2010 09:21:18 +0900 (JST) [thread overview]
Message-ID: <20100705091731.CC91.A69D9226@jp.fujitsu.com> (raw)
In-Reply-To: <20100702113627.GC11732@laptop>
Hi Michel,
> > Solutions:
> > We have a number of patches that partially address these issues:
> > - releasing mmap_sem when a page fault requires a disk read of the backing
> > file
> > - reducing mmap_sem hold time during mlock operations
> > - unfair read acquire for the OOMing threads
At least, personally I'd like to merge your unfair rwsem + appling it for
OOMing thread. If you've alredy finished to make the patch, can you
please post it on LKML?
> > We don't currently have patches for, but would be interested in:
> > - releasing mmap_sem when a page fault causes a disk wait due to memory
> > reclaim (if it's possible to do so while avoiding starvation...)
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prev parent reply other threads:[~2010-07-05 0:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTil6P5PNAYOplauoHiOgno-wrByOSAhS494-DAyJ@mail.gmail.com>
2010-07-02 11:36 ` Nick Piggin
2010-07-05 0:21 ` KOSAKI Motohiro [this message]
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