From: Michael Clark <michael@metaparadigm.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.9 page allocation failure. order:0, mode:0x20
Date: Thu, 28 Oct 2004 22:47:04 +0800 [thread overview]
Message-ID: <41810668.1050800@metaparadigm.com> (raw)
In-Reply-To: <4180FE0A.2020000@metaparadigm.com>
On 10/28/04 22:11, Michael Clark wrote:
> On 10/28/04 17:40, Andrew Morton wrote:
>>
>> I'm confused. 2.6.9 uses __GFP_NOWARN in add_to_swap() so the messages
>> should be suppressed. Are you sure you're using 2.6.9?
>
>
> Ya is 2.6.9, has uml-skas patch also but that doesn't touch swap_state.c
>
> Ah, I see I think, radix_tree_node_alloc first calls kmem_cache_alloc
> with root->gfp_mask and only if this fails dips into the preloaded
> percpu node stash. Perhaps root->gfp_mask has !__GFP_NOWARN
>
> Shouldn't it use the preloaded nodes that have been reserved anyway.
From my other traces - looks like as_get_io_context also needs to use
__GFP_NOWARN in get_io_context as a NULL return appears to be handled.
This is the only other noise i'm getting in my tests.
~mc
next prev parent reply other threads:[~2004-10-28 14:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-28 5:31 2.6.9 page allocation failure. order:0, mode:0x20 Michael Clark
2004-10-28 5:56 ` Michael Clark
2004-10-28 6:02 ` Michael Clark
2004-10-28 7:18 ` Daniel Phillips
2004-10-28 8:29 ` Denis Vlasenko
2004-10-28 15:26 ` Michael Clark
2004-10-28 9:40 ` Andrew Morton
2004-10-28 14:11 ` Michael Clark
2004-10-28 14:47 ` Michael Clark [this message]
2004-10-28 19:51 ` Andrew Morton
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