linux-kernel - Re: Reading /proc/slabinfo causes stalls

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.DEB.2.00.1210161147410.2910@chino.kir.corp.google.com>
Date:	Tue, 16 Oct 2012 11:47:58 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Christoph Lameter <cl@...ux.com>
cc:	Pekka Enberg <penberg@...nel.org>, Avleen Vig <avleen@...il.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Reading /proc/slabinfo causes stalls

On Tue, 16 Oct 2012, Christoph Lameter wrote:

> If the allocator is SLAB then I would think that this is a stall of
> slabinfo mutex vs. slab clean operations (gets more frequent the more
> processors are in the box).
> 
> If this is the case then using the SLUB allocator will fix the issue since
> SLUB does not need to perform cache cleaning.
> 

Or convert slab_mutex to be a rwlock?
--
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/