linux-kernel - Re: CFQ is worse than other IO schedulers in some cases

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Message-ID: <x491vtu8n3p.fsf@segfault.boston.devel.redhat.com>
Date:	Thu, 19 Feb 2009 10:26:02 -0500
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Shan Wei <shanwei@...fujitsu.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org
Subject: Re: CFQ is worse than other IO schedulers in some cases

Shan Wei <shanwei@...fujitsu.com> writes:

> To Jeff:
>
>  The patch can be used on Fedora10. But, on fedora8, the CLONE_IO is not 
> included in the sched.h. So compile fail.
>
> #make
> /usr/local/etc/dumpdates\" -D_DUMP_VERSION=\"0.4b41\"     tape.c -o tape.o
> tape.c: In function ‘fork_clone_io’:
> tape.c:797: error: ‘CLONE_IO’ undeclared (first use in this function)
> tape.c:797: error: (Each undeclared identifier is reported only once
> tape.c:797: error: for each function it appears in.)
> make[1]: *** [tape.o] Error 1

Great, thanks for testing!  I'll fix that up.

Cheers,
Jeff
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