From: Andrew Morton <akpm@linux-foundation.org>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org
Subject: Re: [PATCH, RFC] percpu_counters: make fbc->count read atomic on 32 bit architecture
Date: Mon, 6 Oct 2008 23:23:22 -0700 [thread overview]
Message-ID: <20081006232322.c383fac5.akpm@linux-foundation.org> (raw)
In-Reply-To: <E1KmetO-00053M-5u@closure.thunk.org>
On Sun, 05 Oct 2008 21:28:10 -0400 "Theodore Ts'o" <tytso@mit.edu> wrote:
> The following patch has been sitting in the ext4 patch queue for about
> six weeks. It was there it was a suspected cause for block allocation
> bug. As I recall, it we found the true root cause since then, but this
> has stuck around since it's a potential problem. Andrew has expressed
> concerns that this patch might have performance impacts.
Performace impacts I guess we'll just have to put up with. iirc I was
thinking that this implementation should be pushed down to a kernel-wide
atomic64_t and then the percpu_counters would just use that type.
next parent reply other threads:[~2008-10-07 6:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1KmetO-00053M-5u@closure.thunk.org>
2008-10-07 6:23 ` Andrew Morton [this message]
2008-10-07 9:55 ` [PATCH, RFC] percpu_counters: make fbc->count read atomic on 32 bit architecture Peter Zijlstra
2008-10-07 17:09 ` richard kennedy
2008-10-07 17:22 ` Peter Zijlstra
2008-10-07 18:04 ` Andrew Morton
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