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Open Source and information security mailing list archives
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Date: Sat, 17 Sep 2011 21:17:51 +0100 From: Chris Boot <bootc@...tc.net> To: adam radford <aradford@...il.com> CC: "Woodhouse, David" <david.woodhouse@...el.com>, lkml <linux-kernel@...r.kernel.org>, Adam Radford <linuxraid@....com>, "James E.J. Bottomley" <JBottomley@...allels.com>, linux-scsi@...r.kernel.org Subject: Re: iommu_iova leak [inside 3w-9xxx] On 17/09/2011 20:22, adam radford wrote: > On Sat, Sep 17, 2011 at 7:29 AM, Chris Boot<bootc@...tc.net> wrote: >> On 17 Sep 2011, at 12:57, Chris Boot wrote: >>> On 17 Sep 2011, at 11:45, Woodhouse, David wrote: >>>> I suppose it's vaguely possible that we're leaking them in such a way >>>> that they remain on the rbtree, perhaps if the deferred unmap is never >>>> actually happening... but I think it's a whole lot more likely that the >>>> PCI driver is just never bothering to unmap the pages it maps. > If you think 3w-9xxx is not unmapping pages it maps, please re-run with > CONFIG_PCI_DMA_DEBUG=y I can't find a CONFIG_PCI_DMA_DEBUG to enable in 3.1-rc6. Did you mean CONFIG_DMA_API_DEBUG? And as David Woodhouse mentions, the 3ware card houses my root filesystem - is there a way I can debug without unloading the module? If not I guess I can try to work around it but it would be difficult. Cheers, Chris -- Chris Boot bootc@...tc.net -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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