From: Christoph Hellwig <hch@infradead.org>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Andrew Morton <akpm@osdl.org>,
theonetruekenny@yahoo.com, linux-kernel@vger.kernel.org
Subject: Re: mmap over nfs leads to excessive system load
Date: Wed, 16 Nov 2005 18:38:09 +0000 [thread overview]
Message-ID: <20051116183808.GA5642@infradead.org> (raw)
In-Reply-To: <1132166062.8811.30.camel@lade.trondhjem.org>
On Wed, Nov 16, 2005 at 01:34:22PM -0500, Trond Myklebust wrote:
> Not really. The pages aren't flushed at this time. We the point is to
> gather several pages and coalesce them into one over-the-wire RPC call.
> That means we cannot really do it from inside ->writepage().
>
> We do start the actual RPC calls in ->writepages(), though.
This is a problem we have in various filesystems. Except for really
bad OOM situations the filesystem should never get a writeout request
for a single file. We should really stop having ->writepage called by
the VM and move this kind of batching code into the VM. I'm runnin into
similar issues for XFS and unwritten/delayed extent conversion once again.
next prev parent reply other threads:[~2005-11-16 18:38 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20051115224645.27832.qmail@web34103.mail.mud.yahoo.com>
2005-11-15 23:47 ` mmap over nfs leads to excessive system load Kenny Simpson
2005-11-16 4:31 ` William Lee Irwin III
2005-11-16 6:05 ` Kenny Simpson
2005-11-16 7:45 ` Andrew Morton
2005-11-16 14:03 ` Trond Myklebust
2005-11-16 15:01 ` Kenny Simpson
2005-11-16 17:44 ` Trond Myklebust
2005-11-16 18:00 ` Andrew Morton
2005-11-16 18:34 ` Trond Myklebust
2005-11-16 18:38 ` Christoph Hellwig [this message]
2005-11-17 13:08 ` Nikita Danilov
2005-11-16 19:09 ` Andrew Morton
2005-11-16 20:05 ` Trond Myklebust
2005-11-16 20:56 ` Kenny Simpson
2005-11-16 21:02 ` Kenny Simpson
2005-11-16 21:09 ` Trond Myklebust
2005-11-16 21:17 ` Kenny Simpson
2005-11-16 21:41 ` Kenny Simpson
2005-11-16 21:57 ` Trond Myklebust
2005-11-16 22:04 ` Kenny Simpson
2005-11-16 22:39 ` Kenny Simpson
2005-11-16 23:06 ` Trond Myklebust
2005-11-17 15:40 ` Chuck Lever
2005-11-17 16:56 ` Kenny Simpson
2005-11-17 16:01 ` Kenny Simpson
2005-11-17 21:04 ` Andrew Morton
2005-11-17 21:15 ` Kenny Simpson
2005-11-18 16:55 ` Kenny Simpson
2005-11-18 17:26 ` Kenny Simpson
2005-11-18 21:57 ` Kenny Simpson
2005-11-21 17:13 ` infinite loop? with mmap, nfs, pwrite, O_DIRECT Kenny Simpson
2005-11-21 17:49 ` Chuck Lever
2005-11-21 18:40 ` Kenny Simpson
2005-11-21 20:39 ` Andrew Morton
2005-11-21 21:39 ` Kenny Simpson
2005-11-21 22:42 ` Trond Myklebust
2005-11-21 23:14 ` Kenny Simpson
2005-11-21 23:34 ` Andrew Morton
2005-11-21 23:58 ` Trond Myklebust
2005-11-22 0:09 ` Andrew Morton
2005-11-22 0:18 ` Trond Myklebust
2005-11-22 0:25 ` Trond Myklebust
2005-11-22 0:28 ` Andrew Morton
2005-11-22 0:49 ` Trond Myklebust
2005-11-30 20:04 ` nfs unhappiness with memory pressure Kenny Simpson
2005-11-30 21:42 ` Keith Mannthey
2005-11-30 22:18 ` Kenny Simpson
2005-12-01 14:49 ` Kenny Simpson
2005-12-05 18:01 ` Kenny Simpson
2005-12-05 19:44 ` Kenny Simpson
2005-12-05 20:14 ` Kenny Simpson
2005-12-05 20:13 ` Trond Myklebust
2005-12-05 20:33 ` Trond Myklebust
2005-12-05 20:52 ` Nick Piggin
2005-12-05 21:18 ` Trond Myklebust
2005-12-05 21:23 ` Trond Myklebust
2005-12-05 23:40 ` Nick Piggin
2005-12-06 0:48 ` Trond Myklebust
2005-12-05 21:51 ` Kenny Simpson
2005-12-05 21:04 ` Kenny Simpson
2005-12-05 22:39 ` Trond Myklebust
2005-12-06 3:36 ` Andrew Morton
2005-12-06 3:36 ` Andrew Morton
2005-12-06 4:40 ` Trond Myklebust
2005-12-06 5:42 ` Nick Piggin
2005-12-06 12:18 ` Trond Myklebust
2005-12-06 19:31 ` Kenny Simpson
2005-12-06 15:51 ` Kenny Simpson
2005-11-21 21:54 ` infinite loop? with mmap, nfs, pwrite, O_DIRECT Kenny Simpson
2005-11-21 20:12 ` Kenny Simpson
2005-11-17 17:02 ` mmap over nfs leads to excessive system load Chuck Lever
2005-11-17 17:07 ` Trond Myklebust
2005-11-18 19:59 ` Kenny Simpson
2005-11-16 21:31 ` Andrew Morton
2005-11-16 21:49 ` Trond Myklebust
2005-11-16 22:10 ` Andrew Morton
2005-11-16 22:23 ` Trond Myklebust
2005-11-16 22:38 ` Trond Myklebust
2005-11-16 22:50 ` Andrew Morton
2005-11-16 22:44 ` Andrew Morton
2005-11-16 23:10 ` Trond Myklebust
2005-11-17 0:06 ` Trond Myklebust
2005-11-17 0:25 ` Andrew Morton
2005-11-17 0:28 ` Trond Myklebust
2005-11-17 0:38 ` Andrew Morton
2005-11-17 0:47 ` Trond Myklebust
2005-11-16 18:48 ` Kenny Simpson
2005-11-16 19:06 ` Kenny Simpson
2005-11-08 19:25 Kenny Simpson
2005-11-08 20:01 ` Trond Myklebust
2005-11-08 20:18 ` Kenny Simpson
2005-11-08 20:57 ` Kenny Simpson
-- strict thread matches above, loose matches on Subject: below --
2005-11-08 18:47 Kenny Simpson
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