Re: PF_MEMALLOC in 2.6
From: Stephen C. Tweedie (sct_at_redhat.com)
Date: 08/19/04
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To: Pete Zaitcev <zaitcev@redhat.com> Date: 19 Aug 2004 09:46:18 +0100
Hi,
On Thu, 2004-08-19 at 07:55, Pete Zaitcev wrote:
> The PF_MEMALLOC is required on usb-storage threads in 2.4, because ext3
> will deadlock and otherwise misbehave when it's trying to write out
> dirty pages under memory pressure.
> I received a bug report today from an FC3T1 user with same symptoms
> as 2.4. But I'm entirely clueless in the way VM operates. Comments?
> @@ -285,7 +285,7 @@ static int usb_stor_control_thread(void
> - current->flags |= PF_NOFREEZE;
> + current->flags |= PF_NOFREEZE|PF_MEMALLOC;
Looks entirely reasonable to me.
--Stephen
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