linux-kernel - Re: Small System Paging Problem

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Message-Id: <200711271029.04034.oliver@neukum.org>
Date:	Tue, 27 Nov 2007 10:29:03 +0100
From:	Oliver Neukum <oliver@...kum.org>
To:	"ming lei" <tom.leiming@...il.com>
Cc:	"Josh Goldsmith" <joshin@...mail.com>, linux-kernel@...r.kernel.org
Subject: Re: Small System Paging Problem - OOM-killer goes nuts

Am Dienstag 27 November 2007 schrieb ming lei:
> It seems  oom happenes when VM(page frame reclaim) try to reclaim much
> more memory by writing back dirty pages, but  there is not enough ram
> for usb disk  related driver to finish the writeback operation. (usb
> disk related driver: scsi_mod, usb mass storage, usbcore and uhci or
> ehci )

As far as I can tell, the problem arises because usb-storage's kernel
thread does not run with PF_MEMALLOC and cannot dip into the reserves.

	Regards
		Oliver

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