From: Andrew Morton <akpm@linux-foundation.org>
To: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Cc: linux-kernel@vger.kernel.org, benh@kernel.crashing.org,
linux@roeck-us.net, davem@davemloft.net
Subject: Re: [PATCH] iommu-common: Do not try to deref a null iommu->lazy_flush() pointer when n < pool->hint
Date: Thu, 17 Sep 2015 14:41:26 -0700 [thread overview]
Message-ID: <20150917144126.4038bbec95040fc27ce3db88@linux-foundation.org> (raw)
In-Reply-To: <20150917213213.GE20745@oracle.com>
On Thu, 17 Sep 2015 17:32:13 -0400 Sowmini Varadhan <sowmini.varadhan@oracle.com> wrote:
> On (09/17/15 14:26), Andrew Morton wrote:
> > Patch looks good.
> >
> > But I don't know which kernel versions need the fix. So, when fixing a
> > bug please always describe the end-user visible effects of that bug.
> > Under what circumstances did your kernel crash?
> >
>
> I had a sparc kernel that was crashing when I was trying to process
> some very large perf.data files- the crash happens when the scsi
> driver calls into dma_4v_map_sg and thus the iommu_tbl_range_alloc().
Cool, thanks.
> Do you need me to respin the patch with the above info in the
> commit id?
No, that's fine. I updated the changelog, added cc:stable and shall
send it upstream next week.
prev parent reply other threads:[~2015-09-17 21:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 1:50 Sowmini Varadhan
2015-09-17 21:26 ` Andrew Morton
2015-09-17 21:32 ` Sowmini Varadhan
2015-09-17 21:41 ` Andrew Morton [this message]
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