From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Hugh Dickins <hughd@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Miklos Szeredi <miklos@szeredi.hu>,
akpm@linux-foundation.org, hch@infradead.org,
gurudas.pai@oracle.com, lkml20101129@newton.leun.net,
rjw@sisk.pl, florian@mickler.org, trond.myklebust@fys.uio.no,
maciej.rutecki@gmail.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH] mm: prevent concurrent unmap_mapping_range() on the same inode
Date: Wed, 02 Mar 2011 10:48:16 +0100 [thread overview]
Message-ID: <1299059296.2428.13483.camel@twins> (raw)
In-Reply-To: <alpine.LSU.2.00.1102231448460.5732@sister.anvils>
On Wed, 2011-02-23 at 15:12 -0800, Hugh Dickins wrote:
>
> In his [2/8] mm: remove i_mmap_mutex lockbreak patch, Peter says
> "shouldn't hold up reclaim more than lock_page() would". But (apart
> from a write error case) we always use trylock_page() in reclaim, we
> never dare hold it up on a lock_page().
D'0h! I so missed that, ok fixed up the changelog.
> So page reclaim would get
> held up on truncation more than at present - though he's right to
> point out that truncation will usually be freeing pages much faster.
*phew* :-)
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next prev parent reply other threads:[~2011-03-02 9:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-23 12:49 [PATCH] mm: prevent concurrent unmap_mapping_range() on the same inode Miklos Szeredi
2011-02-23 22:20 ` Hugh Dickins
2011-02-23 22:33 ` Linus Torvalds
2011-02-23 23:12 ` Hugh Dickins
2011-03-02 9:48 ` Peter Zijlstra [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-01-20 12:30 Miklos Szeredi
2011-01-20 12:40 ` Christoph Hellwig
2011-01-20 14:13 ` Miklos Szeredi
2011-01-22 4:46 ` Hugh Dickins
2011-01-24 19:47 ` Miklos Szeredi
2011-01-27 4:19 ` Hugh Dickins
2011-02-08 10:30 ` Miklos Szeredi
2011-02-08 11:52 ` Gurudas Pai
2011-02-08 11:59 ` Miklos Szeredi
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