From: Alex Elder <aelder@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH] xfs: force background CIL push under sustained load
Date: Thu, 23 Sep 2010 13:58:32 -0500 [thread overview]
Message-ID: <1285268312.1973.114.camel@doink> (raw)
In-Reply-To: <1285208863-31489-1-git-send-email-david@fromorbit.com>
On Thu, 2010-09-23 at 12:27 +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@redhat.com>
>
> I have been seeing relatively frequent pauses in transaction throughput up to
> 30s long under heavy parallel workloads. The only thing that seemed strange
> about them was that the xfsaild was active during the pauses, but making no
> progress. It was running exactly 20 times a second (on the 50ms no-progress
> backoff), and the number of pushbuf events was constant across this time as
> well. IOWs, the xfsaild appeared to be stuck on buffers that it could not push
> out.
. . .
If you like I can take this patch directly (i.e., not wait for you to
send a separate pull request). It fixes a real bug but since delayed
logging still an experimental feature I am not inclined to send it to
Linus at this point in the cycle. Let me know if you disagree.
-Alex
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next prev parent reply other threads:[~2010-09-23 18:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 2:27 [PATCH] xfs: force background CIL push under sustained load Dave Chinner
2010-09-23 10:43 ` Christoph Hellwig
2010-09-23 18:53 ` Alex Elder
2010-09-24 1:18 ` Dave Chinner
2010-09-24 14:02 ` Alex Elder
2010-09-23 18:58 ` Alex Elder [this message]
2010-09-24 2:15 ` Dave Chinner
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