linux-kernel - Re: Poor interactive performance with I/O loads with fsync()ing

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Message-ID: <87y6hcyu85.fsf@basil.nowhere.org>
Date:	Mon, 29 Mar 2010 00:08:58 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Ben Gamari <bgamari.foss@...il.com>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, tytso@....edu, npiggin@...e.de,
	mingo@...e.hu, Ruald Andreae <ruald.a@...il.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Olly Betts <olly@...vex.com>,
	martin f krafft <madduck@...duck.net>
Subject: Re: Poor interactive performance with I/O loads with fsync()ing

Ben Gamari <bgamari.foss@...il.com> writes:

You don't say which file system you use, but ext3 and the file systems
with similar journal design (like reiserfs) all have known fsync starvation
issues. The problem is that any fsync has to wait for all transactions
to commit, and this might take a long time depending on how busy
the disk is.

ext4/XFS/JFS/btrfs should be better in this regard

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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