From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [stable] [PATCH] ARCH 2.6.25.y: Fix 32-bit x86 MSI-X allocation leakage Date: Mon, 28 Apr 2008 10:38:02 -0700 Message-ID: <20080428173801.GA933@kroah.com> References: <20080426010025.7212.3940.stgit@scrappy.jf.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: stable@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: PJ Waskiewicz Return-path: Received: from pentafluge.infradead.org ([213.146.154.40]:56164 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763515AbYD1RiU (ORCPT ); Mon, 28 Apr 2008 13:38:20 -0400 Content-Disposition: inline In-Reply-To: <20080426010025.7212.3940.stgit@scrappy.jf.intel.com> Sender: netdev-owner@vger.kernel.org List-ID: On Fri, Apr 25, 2008 at 06:00:26PM -0700, PJ Waskiewicz wrote: > This bug was introduced in the 2.6.24 i386/x86_64 tree merge, where > MSI-X vector allocation will eventually fail. The cause is the new > bit array tracking used vectors is not getting cleared properly on > IRQ destruction on the 32-bit APIC code. > > This can be seen easily using the ixgbe 10 GbE driver on multi-core > systems by simply loading and unloading the driver a few times. > Depending on the number of available vectors on the host system, the > MSI-X allocation will eventually fail, and the driver will only be > able to use legacy interrupts. > > Signed-off-by: Peter P Waskiewicz Jr > --- When sending patches to -stable, please add "CC: stable to the patch itself in the signed-off-by area, that way we get notified automatically when it goes into Linus's tree so that we can then know to apply it to the tree. Otherwise it's a tough job to try to track all of these knowing when to watch out for them to be committed. Can you please resend them to stable@kernel.org when they do go into Linus's tree? thanks, greg k-h