From: Andrew Morton <akpm@linux-foundation.org>
To: Theodore Tso <tytso@mit.edu>
Cc: Jens Axboe <jens.axboe@oracle.com>,
linux-ext4@vger.kernel.org,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH, RFC] Use WRITE_SYNC in __block_write_full_page() if WBC_SYNC_ALL
Date: Mon, 5 Jan 2009 10:47:13 -0800 [thread overview]
Message-ID: <20090105104713.78fdabc9.akpm@linux-foundation.org> (raw)
In-Reply-To: <20090105144740.GA4116@mit.edu>
On Mon, 5 Jan 2009 09:47:40 -0500 Theodore Tso <tytso@mit.edu> wrote:
> there will be times (i.e., when we are doing a checkpoint as
> opposed to a commit, or in a fsync-heavy workload), where we will end
> up getting blocked behind kjournald, so upping the I/O priority really
> does make sense.
Not if it will cause kjournald writes to be prioritised ahead of any
reads, I suspect. Writes are rarely synchronous, but with reads,
there's almost always someone waiting.
next prev parent reply other threads:[~2009-01-05 18:47 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-04 21:52 [PATCH, RFC] Use WRITE_SYNC in __block_write_full_page() if WBC_SYNC_ALL Theodore Ts'o
2009-01-04 22:23 ` Andrew Morton
2009-01-04 22:43 ` Theodore Tso
2009-01-04 23:19 ` Andrew Morton
2009-01-05 0:21 ` Theodore Tso
2009-01-05 8:02 ` Jens Axboe
2009-01-05 14:47 ` Theodore Tso
2009-01-05 15:58 ` Jens Axboe
2009-01-05 18:47 ` Andrew Morton [this message]
2009-01-05 19:35 ` Theodore Tso
2009-01-05 19:38 ` Jens Axboe
2009-01-05 21:16 ` Theodore Tso
2009-01-06 7:34 ` Jens Axboe
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