From: Nicolas Boullis <nicolas.boullis@ecp.fr>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: [uml-devel] I/O Performance
Date: Wed, 22 Oct 2008 16:44:54 +0200 [thread overview]
Message-ID: <48FF3C66.20509@ecp.fr> (raw)
Hi,
Sorry for insisting, but I think it would be nice if things could be
improved before linux 2.6.28.
When COW is not used, the performance is very bad because multiples I/O
are performed when one would be enough. Steve VanDeBogart's "ubd does
multiple io's when one will suffice" patch look clean and solves the
problem.
Performing parallel I/O also much improves the performance (at least
with ubd=sync), but my patch is certainly not clean enough for
inclusion. Jeff, you told me you had such a patch; would you like me tou
give it a try?
Cheers,
Nicolas Boullis
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reply other threads:[~2008-10-22 14:45 UTC|newest]
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