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From: Jeff Moyer <jmoyer@redhat.com>
To: Jan Kara <jack@suse.cz>
Cc: "Alex\,Shi" <alex.shi@intel.com>, Corrado Zoccolo <czoccolo@gmail.com>,
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Subject: Re: [performance bug] kernel building regression on 64 LCPUs machine
References: <AANLkTinAeQMy-OoYYpbYeX=EjZ_-uT=67Ktk1PbE=A7_@mail.gmail.com>
	<x49hbbmpqbo.fsf@segfault.boston.devel.redhat.com>
	<20110302094246.GA7496@quack.suse.cz>
	<x491v2p4i0u.fsf@segfault.boston.devel.redhat.com>
	<20110302211748.GF7496@quack.suse.cz>
	<x49lj0x0zve.fsf@segfault.boston.devel.redhat.com>
	<20110304153248.GC2649@quack.suse.cz>
	<x49d3m6j35j.fsf@segfault.boston.devel.redhat.com>
	<x491v2mivv6.fsf@segfault.boston.devel.redhat.com>
	<1300779499.30136.353.camel@debian>
	<20110322161405.GB19716@quack.suse.cz>
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X-PCLoadLetter: What the f**k does that mean?
Date: Tue, 22 Mar 2011 13:46:06 -0400
In-Reply-To: <20110322161405.GB19716@quack.suse.cz> (Jan Kara's message of
	"Tue, 22 Mar 2011 17:14:05 +0100")
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Jan Kara <jack@suse.cz> writes:

> Jeff, I suppose the log files of fs_mark processes are on the same
> device as the test directory, aren't they - that might explain the
> flusher thread doing IO? The patch below

No.  My test environments are sane.  The file system is on a completely
separate disk and it is unmounted and remounted in between each run.
That should take care of any lost flushes.

Did you receive my last couple of private emails commenting on the trace
data?

Cheers,
Jeff