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Re: vmap allocation for size 1048576 failed

To: xfs@xxxxxxxxxxx
Subject: Re: vmap allocation for size 1048576 failed
From: Michael Weissenbacher <mw@xxxxxxxxxxxx>
Date: Thu, 18 Nov 2010 11:50:25 +0100
In-reply-to: <20101110123052.GW2715@dastard>
References: <4CD924A6.6040200@xxxxxxxxxxxx> <20101109120701.GN2715@dastard> <4CDA54E3.308@xxxxxxxxxxxx> <20101110123052.GW2715@dastard>
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6
Hi Dave!
> 
> Ok, thanks for the info. I'm struggling to work out what is actually
> consuming vmap space given what you are doing and the storage
> config. None of the operations you are doing should be triggering
> mapping of multipage metadata buffers given the filesystem
> configuration....
> 
I've set vmalloc=768M and haven't seen the problem since. Maybe the
vmalloc/vmap problem has to do with the fact that i'm running
iscsi_target on the same machine? As long as the problem doesn't occur
again i'm ok with setting the vmalloc parameter.

Thanks for your help,
Michael

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