From: William Lee Irwin III <wli@holomorphy.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Andrew Morton <akpm@digeo.com>,
kernel list <linux-kernel@vger.kernel.org>
Subject: Re: Hot/cold allocation -- swsusp can not handle hot pages
Date: Sun, 3 Nov 2002 12:14:48 -0800 [thread overview]
Message-ID: <20021103201448.GM23425@holomorphy.com> (raw)
In-Reply-To: <20021103200809.GC27271@elf.ucw.cz>
At some point in the past, Andrew Morton wrote:
>> I'm not really sure what to suggest here. Emptying the per-cpu
>> page pools would be tricky. Maybe a swsusp-special page allocator
>> which goes direct to the buddy lists or something.
On Sun, Nov 03, 2002 at 09:08:09PM +0100, Pavel Machek wrote:
> Well, see the patch above. That seems to do the trick for
> me. It seems that even "cold" allocation can give page from per-cpu
> pool. I thought that was a bug?
Not a bug. The semantics only imply a preference for merging, not
a requirement to do so. A direct dequeue-from-buddy method either
by adjusting watermarks or a specialized interface in combination
with per-cpu list shootdown is required to enforce your invariants.
Bill
next prev parent reply other threads:[~2002-11-03 20:09 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-02 18:19 Hot/cold allocation -- swsusp can not handle hot pages Pavel Machek
2002-11-02 18:46 ` William Lee Irwin III
2002-11-02 20:22 ` Pavel Machek
2002-11-02 21:48 ` Andrew Morton
2002-11-03 20:08 ` Pavel Machek
2002-11-03 20:14 ` William Lee Irwin III [this message]
2002-11-03 20:21 ` Andrew Morton
2002-11-03 20:26 ` Pavel Machek
2002-11-03 20:52 ` William Lee Irwin III
2002-11-03 21:22 ` William Lee Irwin III
2002-11-03 22:53 ` Pavel Machek
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