From: Jeff Moyer <jmoyer@redhat.com>
To: Jagdish Motwani <jagdish.motwani@elitecore.com>
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f )
Date: Fri, 21 Sep 2012 10:17:37 -0400 [thread overview]
Message-ID: <x49r4pvlata.fsf@segfault.boston.devel.redhat.com> (raw)
In-Reply-To: <505C700C.3010403@elitecore.com> (Jagdish Motwani's message of "Fri, 21 Sep 2012 19:17:56 +0530")
Jagdish Motwani <jagdish.motwani@elitecore.com> writes:
> Recently i upgraded my kernel from 2.6.29.6 to 2.6.35.14.
>
> After upgrading i got very poor performance on my postgre database.
[...]
> Using git bisect, i got commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f
>
> Is it a behavior change or am i missing something? Are there any
> workarounds for this?
commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f
Author: Christoph Hellwig <hch@lst.de>
Date: Thu Oct 29 14:14:04 2009 +0100
blkdev: flush disk cache on ->fsync
This is a data integrity fix, and you really don't want to work around
it.
Cheers,
Jeff
next prev parent reply other threads:[~2012-09-21 14:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 13:47 performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f ) Jagdish Motwani
2012-09-21 14:17 ` Jeff Moyer [this message]
2012-09-21 14:25 ` performance degradation on kernel upgrade (due to commit ab0a9735e06914ce4d2a94ffa41497dbc142fe7f) Andres Freund
2012-09-24 5:45 ` Jagdish Motwani
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