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Open Source and information security mailing list archives
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Date: Mon, 19 Jul 2010 10:07:10 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: David Rientjes <rientjes@...gle.com> Cc: Christoph Lameter <cl@...ux-foundation.org>, Pekka Enberg <penberg@...helsinki.fi>, linux-mm@...ck.org, Roland Dreier <rdreier@...co.com>, linux-kernel@...r.kernel.org, Nick Piggin <npiggin@...e.de> Subject: Re: [S+Q2 07/19] slub: Allow removal of slab caches during boot On Wed, 2010-07-14 at 16:48 -0700, David Rientjes wrote: > On Fri, 9 Jul 2010, Christoph Lameter wrote: > > > If a slab cache is removed before we have setup sysfs then simply skip over > > the sysfs handling. > > > > Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org> > > Cc: Roland Dreier <rdreier@...co.com> > > Signed-off-by: Christoph Lameter <cl@...ux-foundation.org> > > Acked-by: David Rientjes <rientjes@...gle.com> > > I missed this case earlier because I didn't consider slab caches being > created and destroyed prior to slab_state == SYSFS, sorry! Ok so I may be a bit sleepy or something but I still fail to see how this whole thing isn't totally racy... AFAIK. By the time we switch the slab state, we -do- have all CPUs up and can race happily between creating slab caches and creating the sysfs files... Ben. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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