From: Sasha Levin <levinsasha928@gmail.com>
To: Hugh Dickins <hughd@google.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Minchan Kim <minchan@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm: raise MemFree by reverting percpu_pagelist_fraction to 0
Date: Fri, 11 May 2012 10:30:56 +0200 [thread overview]
Message-ID: <CA+1xoqcChazS=TRt6-7GjJAzQNFLFXmO623rWwjRkdD5x3k=iw@mail.gmail.com> (raw)
In-Reply-To: <alpine.LSU.2.00.1205110054520.2801@eggly.anvils>
On Fri, May 11, 2012 at 10:00 AM, Hugh Dickins <hughd@google.com> wrote:
> Commit 93278814d359 "mm: fix division by 0 in percpu_pagelist_fraction()"
> mistakenly initialized percpu_pagelist_fraction to the sysctl's minimum 8,
> which leaves 1/8th of memory on percpu lists (on each cpu??); but most of
> us expect it to be left unset at 0 (and it's not then used as a divisor).
I'm a bit confused about this, does it mean that once you set
percpu_pagelist_fraction to a value above the minimum, you can no
longer set it back to being 0?
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next prev parent reply other threads:[~2012-05-11 8:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-11 8:00 Hugh Dickins
2012-05-11 8:30 ` Sasha Levin [this message]
2012-05-11 8:38 ` Minchan Kim
2012-05-11 9:01 ` Minchan Kim
2012-05-11 16:27 ` Linus Torvalds
2012-05-11 16:35 ` Sasha Levin
2012-05-11 16:54 ` Linus Torvalds
2012-05-14 8:51 ` Cong Wang
2012-05-11 14:10 ` Hugh Dickins
2012-05-14 1:51 ` Minchan Kim
2012-05-11 16:26 ` Linus Torvalds
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