netdev - [PATCH 2.6.27.2] datagram handling routines : mapping/unmapping paged data in soft IRQ

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Message-ID: <54466B0E862D654998371DCA86B6FE2F4B6D47@adept-srv2.adept.local>
Date:	Mon, 11 May 2009 15:32:21 +0200
From:	"Luc Goria" <Luc.Goria@...pt-telecom.fr>
To:	<netdev@...r.kernel.org>
Cc:	<linux-kernel@...r.kernel.org>, <alan@...hat.com>
Subject: [PATCH 2.6.27.2] datagram handling routines : mapping/unmapping paged data in soft IRQ

Kernel crashes when a network module tries to copy a datagram to iovec in soft IRQ with paged data.
The problem is that kunmap function can't be called in IRQ.
All calls to kmap/kunmap fonctions are replaced by calls to kmap_skb_frag/kunmap_skb_frag when paged data are involved.

 <<datagram.c.patch>> 
Signed-off-by: Luc GORIA <luc.goria@...pt-telecom.fr>

Download attachment "datagram.c.patch" of type "application/octet-stream" (1623 bytes)