From: Yasunori Goto <y-goto@jp.fujitsu.com>
Date: Sat, 28 Oct 2006 17:38:32 +0000 (-0700)
Subject: [PATCH] memory hotplug: __GFP_NOWARN is better for __kmalloc_section_memmap()
X-Git-Tag: v2.6.19-rc4~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f2d0aa5bf8d4f7ae4cb1a7feebf5b1afddd0b9b0;p=pandora-kernel.git

[PATCH] memory hotplug: __GFP_NOWARN is better for __kmalloc_section_memmap()

Add __GFP_NOWARN flag to calling of __alloc_pages() in
__kmalloc_section_memmap().  It can reduce noisy failure message.

In ia64, section size is 1 GB, this means that order 8 pages are necessary
for each section's memmap.  It is often very hard requirement under heavy
memory pressure as you know.  So, __alloc_pages() gives up allocation and
shows many noisy stack traces which means no page for each sections.
(Current my environment shows 32 times of stack trace....)

But, __kmalloc_section_memmap() calls vmalloc() after failure of it, and it
can succeed allocation of memmap.  So, its stack trace warning becomes just
noisy.  I suppose it shouldn't be shown.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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