From: Linus Torvalds Subject: Re: 2.6.26-rc: nfsd hangs for a few sec Date: Sat, 21 Jun 2008 16:54:47 -0700 (PDT) Message-ID: References: <20080621224135.GD4692@csn.ul.ie> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: Mel Gorman , Alexander Beregalov , kernel-testers@vger.kernel.org, kernel list , linux-mm@kvack.org, Lee Schermerhorn , KAMEZAWA Hiroyuki , Hugh Dickins , Nick Piggin , Andrew Morton , bfields@fieldses.org, neilb@suse.de, linux-nfs@vger.kernel.org To: Christoph Lameter Return-path: In-Reply-To: Sender: kernel-testers-owner@vger.kernel.org List-ID: On Sat, 21 Jun 2008, Christoph Lameter wrote: > > Not a direct explanation for the problem but the memory wastage could > certainly can heretofore undiscovered locking dependencies to be > exposed. Well, not for these traces, no. The trace contains __slab_alloc() in the call chain, which definitely fingers SLUB, not slab, despite the name (slab calls its allocation routines "cache_alloc", while slub calls them "slab_alloc" ;) So the patch looks fine, and I applied it, but as Mel already mentioned, it looks like it won't be making any difference for Alexander. Linus