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Date: Thu, 24 Oct 2002 18:16:51 +0530
From: Maneesh Soni <maneesh@in.ibm.com>
To: Ed Tomlinson <tomlins@cam.org>
Cc: Dipankar Sarma <dipankar@in.ibm.com>, linux-kernel@vger.kernel.org,
       akpm@digeo.com
Subject: Re: [long]2.5.44-mm3 UP went into unexpected trashing
Message-ID: <20021024181651.E5311@in.ibm.com>
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On Thu, Oct 24, 2002 at 07:47:39AM -0400, Ed Tomlinson wrote:
> Maneesh Soni wrote:
> 
> > On Thu, Oct 24, 2002 at 08:22:07AM +0000, Andrew Morton wrote:
> >> Andrew Morton wrote:
> >> > 
> >> > Hopefully the rcu fix in -mm4 will cure this.
> >> 
> >> Oh.  It was in -mm3 too.  But something went wrong with the
> >> dcache shrinking there.
> > 
> > Backing out larger-cpu-masks.patch fixes this in -mm3 so, -mm4 should not
> > give this problem. Basically callbacks are not getting processed due to
> > incorrect rcu_cpu_mask.
> 
> Would this affect UP systems?  Had the dentry leak on a UP box with 512m 
> memory.  About 400m ended up in unfreeable dentries...

Actually problem does not appear for SMP (with default NRCPUS) kernel as it getsproper rcu_cpu_mask and for UP it is not correct.

Maneesh


-- 
Maneesh Soni
IBM Linux Technology Center, 
IBM India Software Lab, Bangalore.
Phone: +91-80-5044999 email: maneesh@in.ibm.com
http://lse.sourceforge.net/
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