Re: [Bug #14016] mm/ipw2200 regression

[Cc netdev]

On Wed, Aug 26, 2009 at 09:09:44AM +0300, Pekka Enberg wrote:

On Tue, Aug 25, 2009 at 11:34 PM, Rafael J. Wysocki[off-list ref] wrote:

quoted

This message has been generated automatically as a part of a report
of recent regressions.

The following bug entry is on the current list of known regressions
from 2.6.30.  Please verify if it still should be listed and let me know
(either way).

Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=14016
Subject         : mm/ipw2200 regression
Submitter       : Bartlomiej Zolnierkiewicz [off-list ref]
Date            : 2009-08-15 16:56 (11 days old)
References      : http://marc.info/?l=linux-kernel&m=125036437221408&w=4

If am reading the page allocator dump correctly, there's plenty of
pages left but we're unable to satisfy an order 6 allocation. There's
no slab allocator involved so the page allocator changes that went
into 2.6.31 seem likely. Mel, ideas?

It's an atomic order-6 allocation, the chances for this to succeed
after some uptime become infinitesimal.  The chunks > order-2 are
pretty much exhausted on this dump.

64 pages, presumably 256k, for fw->boot_size while current ipw
firmware images have ~188k.  I don't know jack squat about this
driver, but given the field name and the struct:

	struct ipw_fw {
		__le32 ver;
		__le32 boot_size;
		__le32 ucode_size;
		__le32 fw_size;
		u8 data[0];
	};

fw->boot_size alone being that big sounds a bit fishy to me.

	Hannes