On Wed, 03 Jun 2015 17:57:43 -0400 Jes Sorensen <Jes.Sorensen@xxxxxxxxxx> wrote: > NeilBrown <neilb@xxxxxxx> writes: > > On Wed, 03 Jun 2015 16:20:21 -0400 Jes Sorensen <Jes.Sorensen@xxxxxxxxxx> > > wrote: > > > >> Neil, > >> > >> I was running testing on the current 4.1-rc6 tree (Linus' top of trunk > >> 8cd9234c64c584432f6992fe944ca9e46ca8ea76) and I am seeing the following > >> OOPS which is reproducible. > >> > >> It shows up when running the mdadm test suite, 07changelevelintr to be > >> specific. > >> > >> Is this something you have seen? > >> > >> Cheers, > >> Jes > >> > >> ------------[ cut here ]------------ > >> kernel BUG at drivers/md/raid5.c:5391! > > > > No, I haven't seen that. And I've been running the test suite quite a bit > > lately. > > > > Can you get it to print out the relevant numbers? Include > > readpos/writepos/safepos too. > > This enough? Let me know if you need more. > > I suspect this started happening with the changes that went in between > 4.1-rc5 and 4.1-rc6. I will try to bisect it tomorrow. > > Cheers, > Jes > > mddev->dev_sectors: 0x9800, reshape_sectors: 0x0200 stripe_addr: fffffffffffffdff, sector_nr 0, readpos 511, writepos -513, safepos 512 Those negative numbers look VERY suspicious. I'm actually on leave this week so I won't be looking at it any more, but I'll see what I can find on Monday. Thanks, NeilBrown
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