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Re: vmalloc, xfs_buf_get: failed to map pages

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: vmalloc, xfs_buf_get: failed to map pages
From: Mario Bachmann <grafgrimm77@xxxxxx>
Date: Thu, 1 Jul 2010 13:45:30 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20100621072118.GA1361@xxxxxxxxxxxxx>
References: <20100619150119.3ce64102@xxxxxxxxxxx> <20100621072118.GA1361@xxxxxxxxxxxxx>
Hi again, 

what is a good value for vmalloc= ? 
The machine has 1 GB of RAM. 

Greetings
Mario

Am Mon, 21 Jun 2010 03:21:18 -0400
schrieb Christoph Hellwig <hch@xxxxxxxxxxxxx>:

> On Sat, Jun 19, 2010 at 03:01:19PM +0200, Mario Bachmann wrote:
> > Hello, 
> > 
> > on a 32bit machine, I have big problems with Linux 2.6.34. 
> > With Linux 2.6.33.4 everything runs fine. 
> > 
> > I do not know where to search for known bugs in xfs.
> > 
> > /var/log/messages shows a lot of lines:
> > 
> > Jun 19 11:43:15 amd2000 kernel: vmap allocation for size 4194304 failed: 
> > use vmalloc=<size> to increase size.
> > Jun 19 11:43:15 amd2000 kernel: xfs_buf_get: failed to map pages
> > 
> > What to to?
> 
> Strange.  There have been no fixes to the vmap allocator nor to the
> XFS using this.  What other modules are you ising?  Maybe they increased
> their amount of used vmalloc space.  For now the only thing you can do
> is using the vmalloc= kernel paramter to increase the vmalloc space.

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