From: Andrea Arcangeli <andrea@suse.de>
To: Kanoj Sarcar <kanoj@google.engr.sgi.com>
Cc: Linus Torvalds <torvalds@transmeta.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-mm@kvack.org, linux-kernel@vger.rutgers.edu
Subject: Re: [RFC] 2.3.39 zone balancing
Date: Thu, 13 Jan 2000 18:12:45 +0100 (CET) [thread overview]
Message-ID: <Pine.LNX.4.21.0001131806190.1648-100000@alpha.random> (raw)
In-Reply-To: <200001122111.NAA68159@google.engr.sgi.com>
On Wed, 12 Jan 2000, Kanoj Sarcar wrote:
>+There are two reasons to be requesting non __GFP_WAIT allocations:
>+the caller can not sleep (typically intr context), or does not want
>+to incur cost overheads of page stealing and possible swap io.
You may be in a place where you can sleep but you can't do I/O to avoid
deadlocking and so you shouldn't use __GFP_IO and nothing more (it has
nothing to do with __GFP_WAIT).
But if it can sleep and there aren't deadlock conditons going on and it
doesn't use __GFP_WAIT, it means it's buggy and has to be fixed.
I have not read the rest and the patch yet (I'll continue ASAP).
Andrea
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next prev parent reply other threads:[~2000-01-13 17:12 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-01-12 21:11 Kanoj Sarcar
2000-01-13 13:40 ` Rik van Riel
2000-01-13 17:06 ` Andrea Arcangeli
2000-01-13 17:18 ` Alan Cox
2000-01-13 18:37 ` Rik van Riel
2000-01-13 20:13 ` Andrea Arcangeli
2000-01-13 21:12 ` Rik van Riel
2000-01-13 21:40 ` Kanoj Sarcar
2000-01-14 12:25 ` Jamie Lokier
2000-01-14 13:43 ` Andrea Arcangeli
2000-01-13 18:52 ` Kanoj Sarcar
2000-01-13 19:59 ` Andrea Arcangeli
2000-01-13 21:02 ` Kanoj Sarcar
2000-01-13 21:34 ` Benjamin C.R. LaHaise
2000-01-13 21:48 ` Kanoj Sarcar
2000-01-13 21:42 ` Alan Cox
2000-01-13 21:50 ` Kanoj Sarcar
2000-01-13 21:53 ` Alan Cox
2000-01-13 22:01 ` Linus Torvalds
2000-01-13 22:13 ` Kanoj Sarcar
2000-01-13 22:28 ` Rik van Riel
2000-01-13 22:30 ` Linus Torvalds
2000-01-13 23:53 ` Ingo Molnar
2000-01-13 23:29 ` Linus Torvalds
2000-01-14 0:33 ` Andrea Arcangeli
2000-01-14 0:52 ` Linus Torvalds
2000-01-14 1:08 ` Rik van Riel
2000-01-14 2:13 ` Ingo Molnar
2000-01-14 1:17 ` Kanoj Sarcar
2000-01-14 2:36 ` Ingo Molnar
2000-01-14 20:33 ` Peter Rival
2000-01-14 1:13 ` Kanoj Sarcar
2000-01-14 2:27 ` Ingo Molnar
2000-01-14 2:46 ` Ingo Molnar
2000-01-14 6:22 ` Kanoj Sarcar
2000-01-15 2:03 ` Reworked 2.3.39 zone balancing - v1 Kanoj Sarcar
2000-01-14 0:28 ` [RFC] 2.3.39 zone balancing Andrea Arcangeli
2000-01-13 17:12 ` Andrea Arcangeli [this message]
2000-01-13 18:30 ` Kanoj Sarcar
2000-01-13 19:22 ` Andrea Arcangeli
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