Messages in this thread | | | Date | Fri, 30 Nov 2018 05:14:41 -0500 | From | Sasha Levin <> | Subject | Re: [PATCH AUTOSEL 4.14 25/35] iomap: sub-block dio needs to zeroout beyond EOF |
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On Fri, Nov 30, 2018 at 09:22:03AM +0100, Greg KH wrote: >On Fri, Nov 30, 2018 at 09:40:19AM +1100, Dave Chinner wrote: >> I stopped my tests at 5 billion ops yesterday (i.e. 20 billion ops >> aggregate) to focus on testing the copy_file_range() changes, but >> Darrick's tests are still ongoing and have passed 40 billion ops in >> aggregate over the past few days. >> >> The reason we are running these so long is that we've seen fsx data >> corruption failures after 12+ hours of runtime and hundreds of >> millions of ops. Hence the testing for backported fixes will need to >> replicate these test runs across multiple configurations for >> multiple days before we have any confidence that we've actually >> fixed the data corruptions and not introduced any new ones. >> >> If you pull only a small subset of the fixes, the fsx will still >> fail and we have no real way of actually verifying that there have >> been no regression introduced by the backport. IOWs, there's a >> /massive/ amount of QA needed for ensuring that these backports work >> correctly. >> >> Right now the XFS developers don't have the time or resources >> available to validate stable backports are correct and regression >> fre because we are focussed on ensuring the upstream fixes we've >> already made (and are still writing) are solid and reliable. > >Ok, that's fine, so users of XFS should wait until the 4.20 release >before relying on it? :)
It's getting to the point that with the amount of known issues with XFS on LTS kernels it makes sense to mark it as CONFIG_BROKEN.
>I understand your reluctance to want to backport anything, but it really >feels like you are not even allowing for fixes that are "obviously >right" to be backported either, even after they pass testing. Which >isn't ok for your users.
Do the XFS maintainers expect users to always use the latest upstream kernel?
-- Thanks, Sasha
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