Messages in this thread | | | Date | Thu, 5 Feb 2004 09:13:20 +0530 | From | Suparna Bhattacharya <> | Subject | Re: [PATCH 2.6.2-rc3-mm1] DIO read race fix |
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On Wed, Feb 04, 2004 at 07:19:21PM -0800, Andrew Morton wrote: > Janet Morgan <janetmor@us.ibm.com> wrote: > > > > >Daniel McNeil <daniel@osdl.org> wrote: > > > > > > > > >>I have found (finally) the problem causing DIO reads racing with > > >>buffered writes to see uninitialized data on ext3 file systems > > >>(which is what I have been testing on). > > >> > > >> > > > > > >What kernel? If -mm, is this the only remaining buffered-vs-direct > > >problem? > > > > > > > > > > > I think there was consensus on two other patches along the way: > > > > http://marc.theaimsgroup.com/?l=linux-kernel&m=107286971311559&w=2 > > http://marc.theaimsgroup.com/?l=linux-aio&m=107291089712224&w=2 > > Yes, I think those are needed but this thing has been dragging on for so > long it has become a little unclear. This was the main reason why I backed > off the fs-aio patches. > > Daniel, could you please work out whether we actually need those patches > and if so, prep them for us? Presumably if ext2 passes all testing without > those patches, we do not need them.
I think we agreed from a logical standpoint that those patches are correct and needed, didn't we ?
Whether or not we encounter those races in our testing is to a certain extent a matter of chance. I wouldn't use passing of all tests for ext2 as a proof that they aren't needed. It just tells us that they may be less likely.
Regards Suparna
-- Suparna Bhattacharya (suparna@in.ibm.com) Linux Technology Center IBM Software Lab, India
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