From: Pavel Machek <pavel@ucw.cz>
To: Andrew Morton <akpm@osdl.org>
Cc: Peter Osterlund <petero2@telia.com>, linux-kernel@vger.kernel.org
Subject: Re: Software suspend testing in 2.6.0-test1
Date: Fri, 18 Jul 2003 17:22:05 +0200 [thread overview]
Message-ID: <20030718152205.GA407@elf.ucw.cz> (raw)
In-Reply-To: <20030718032433.4b6b9281.akpm@osdl.org>
Hi!
> > If this patch is an acceptable approach to fix the problem,
>
> Seems reasonable.
>
> > the balance_pgdat function should probably be cleaned up.
>
> Well it was rather bolted on the side of the kswapd code. But from an API
> perspective, being able to tell it how many page to free is a bit more
> flexible. Minor point.
>
> However I'm trying to remember why the code exists at all. Why doesn't
> swsusp just allocate lots of pages then free them again?
Because that either
a) does not free enough pages or
b) triggers OOM killer.
It was actually your idea, IIRC ;-).
Ahha, you seem to be addressing that in your code. Peter, perhaps you
want to test that one?
Pavel
> Something like:
>
> LIST_HEAD(list);
> int sleep_count = 0;
>
> while (sleep_count < 10) {
> page = __alloc_pages(0, GFP_ATOMIC);
> if (page) {
> list_add(&page->list, &list);
> } else {
> blk_congestion_wait(WRITE, HZ/20);
> sleep_count++;
> }
> }
> <free all the pages on `list'>
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
next prev parent reply other threads:[~2003-07-18 15:12 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-17 19:46 Software suspend testing in 2.6.0-test1 Peter Osterlund
2003-07-17 20:00 ` Pavel Machek
2003-07-17 20:09 ` Andrew Morton
2003-07-18 9:59 ` Peter Osterlund
2003-07-18 10:24 ` Andrew Morton
2003-07-18 15:22 ` Pavel Machek [this message]
2003-07-18 15:55 ` Peter Osterlund
2003-07-18 16:45 ` Andrew Morton
2003-07-18 17:50 ` Pavel Machek
2003-07-18 18:02 ` Patrick Mochel
2003-07-18 18:04 ` Pavel Machek
2003-07-18 21:05 ` Nigel Cunningham
2003-07-18 19:37 ` Andrew Morton
2003-07-18 19:58 ` Peter Osterlund
2003-07-18 20:15 ` Andrew Morton
2003-07-18 22:13 ` Pavel Machek
2003-07-20 0:22 ` Peter Osterlund
2003-07-20 1:01 ` Andrew Morton
2003-07-20 7:45 ` Peter Osterlund
2003-07-18 21:05 ` Nigel Cunningham
2003-07-21 10:00 ` Peter Osterlund
2003-07-21 12:58 ` Pavel Machek
2003-07-21 14:36 ` Peter Osterlund
2003-07-21 21:28 ` Pavel Machek
2003-07-21 23:46 ` Peter Osterlund
2003-07-22 11:04 ` Pavel Machek
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