Control: tag -1 +pending
On Fri, Mar 20, 2015 at 04:13:20PM +, Steve McIntyre wrote:
Package: src:linux
Version: 3.16.7-ckt7-1
Severity: grave
Tags: upstream
Hi folks,
We've upgraded a couple of our Marvell Armada XP based (armel/armhf)
buildd machines to Jessie, and they've almost immediately fallen over
with symptoms of really bad data corruption. On further investigation
and discussion with some of the upstream maintainers for this
hardware, this is a known issue with I/O coherency and there are
patches available for testing:
* 8f1e8ee28660018a935c7576b9af8ffe1feab54c is a patch to disable
coherency for now, and
* http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/330104.html
is a second patch needed too (do not register custom DMA operations
when coherency is disabled)
I'm just doing a local build right now with these patches applied so I
can test. More news ASAP.
Summarising discussion from IRC:
Patch #1 above was already applied to the jessie kernel, but patch #2
was not. The bpo kernel we have previously been using had neither, and
that worked OK.
My testing over the weekend with a locally-built kernel including
patch #2 as well was 100% successful, so r22457 looks like it will fix
this bug. A prompt upload would be appreciated to get this into Jessie
for our buildds! :-)
Cheers guys, and thanks very much for the quick replies.
--
Steve McIntyre, Cambridge, UK.st...@einval.com
You can't barbecue lettuce! -- Ellie Crane
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