From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Andrew Morton <akpm@osdl.org>
Cc: Neil Brown <neilb@suse.de>, David Chinner <dgc@sgi.com>,
linux-kernel@vger.kernel.org
Subject: Re: RFC - how to balance Dirty+Writeback in the face of slow writeback.
Date: Thu, 17 Aug 2006 12:22:59 -0400 [thread overview]
Message-ID: <1155831779.5620.15.camel@localhost> (raw)
In-Reply-To: <20060817081415.f48fbb37.akpm@osdl.org>
On Thu, 2006-08-17 at 08:14 -0700, Andrew Morton wrote:
> Take a look at blk_congestion_wait(). It doesn't know about request
> queues. We'd need a new
>
> void writeback_congestion_end(int rw)
> {
> wake_up(congestion_wqh[rw]);
> }
>
> or similar.
...and how often do you want us to call this? NFS doesn't know much
about request queues either: it writes out pages on a per-RPC call
basis. In the worst case that could mean waking up the VM every time we
write out a single page.
Cheers,
Trond
next prev parent reply other threads:[~2006-08-17 16:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-14 23:40 RFC - how to balance Dirty+Writeback in the face of slow writeback Neil Brown
2006-08-15 8:06 ` Andrew Morton
2006-08-15 23:00 ` David Chinner
2006-08-17 4:08 ` Neil Brown
2006-08-17 6:14 ` Andrew Morton
2006-08-17 12:36 ` Trond Myklebust
2006-08-17 15:14 ` Andrew Morton
2006-08-17 16:22 ` Trond Myklebust [this message]
2006-08-18 5:49 ` Andrew Morton
2006-08-18 10:43 ` Nikita Danilov
2006-08-18 0:11 ` David Chinner
2006-08-18 6:29 ` Andrew Morton
2006-08-18 7:03 ` Jens Axboe
2006-08-18 7:11 ` Andrew Morton
2006-08-18 18:57 ` Andi Kleen
2006-08-21 0:35 ` Neil Brown
2006-08-21 3:15 ` David Chinner
2006-08-21 7:24 ` Neil Brown
2006-08-21 13:51 ` Jens Axboe
2006-08-25 4:36 ` Neil Brown
2006-08-25 6:37 ` Jens Axboe
2006-08-28 1:28 ` David Chinner
2006-08-25 13:16 ` Trond Myklebust
2006-08-27 8:21 ` Neil Brown
2006-08-21 14:28 ` David Chinner
2006-08-25 5:24 ` Neil Brown
2006-08-28 1:55 ` David Chinner
2006-08-21 7:47 ` Andi Kleen
2006-08-18 7:07 ` Neil Brown
2006-08-17 22:17 ` David Chinner
2006-08-17 3:59 ` Neil Brown
2006-08-17 6:22 ` Andrew Morton
2006-08-17 8:36 ` Jens Axboe
2006-08-17 13:21 ` Trond Myklebust
2006-08-17 15:30 ` Andrew Morton
2006-08-17 16:18 ` Trond Myklebust
2006-08-18 5:34 ` Andrew Morton
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