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Re: xfsdump stuck in io_schedule - st driver pinning

To: Andi Kleen <ak@xxxxxxx>
Subject: Re: xfsdump stuck in io_schedule - st driver pinning
From: Zlatko Calusic <zlatko.calusic@xxxxxxxx>
Date: Sat, 16 Nov 2002 11:45:12 +0100
Cc: Steve Lord <lord@xxxxxxx>, Andrew Morton <akpm@xxxxxxxxx>, linux-xfs@xxxxxxxxxxx
In-reply-to: <20021115235546.A10107@xxxxxxxxxxxxx> (Andi Kleen's message of "Fri, 15 Nov 2002 23:55:46 +0100")
References: <dnfzu3yw8u.fsf@xxxxxxxxxxxxxxxxx> <20021115135233.A13882@xxxxxxxxxxxxxxxx> <dnlm3v9ebk.fsf@xxxxxxxxxxxxxxxxx> <20021115140635.A31836@xxxxxxxxxxxxx> <dnr8dmj1i1.fsf@xxxxxxxxxxxxxxxxx> <3DD57602.857AD62D@xxxxxxxxx> <1037400155.24118.231.camel@xxxxxxxxxxxxxxxxxxxx> <20021115235546.A10107@xxxxxxxxxxxxx>
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Andi Kleen <ak@xxxxxxx> writes:

> Another comment: 
>
> wasn't the ST driver recently changed in 2.5 to do direct IO from user space?
> That could disturb VM somewhat too because it will pin a lot of pages.

If by ST driver you mean SCSI Tape driver, then it is not the reason
here because I'm dumping to a file on a different disk. So, it is not
involved (I don't even have it compiled in the kernel). Also, I forgot
to mention, disks are both IDE (on both machines I have tested).
-- 
Zlatko


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