From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: Andrew Morton <akpm@linux-foundation.org>
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 17:32:13 -0400 [thread overview]
Message-ID: <20150917213213.GE20745@oracle.com> (raw)
In-Reply-To: <20150917142644.a7a3c272be10280028c5ad3a@linux-foundation.org>
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().
Do you need me to respin the patch with the above info in the
commit id?
--Sowmini
next prev parent reply other threads:[~2015-09-17 21:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 1:50 [PATCH] iommu-common: Do not try to deref a null iommu->lazy_flush() pointer when n < pool->hint Sowmini Varadhan
2015-09-17 21:26 ` Andrew Morton
2015-09-17 21:32 ` Sowmini Varadhan [this message]
2015-09-17 21:41 ` Andrew Morton
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