Messages in this thread |  | | Date | Wed, 5 Jun 1996 08:51:45 +0300 (EET DST) | From | Linus Torvalds <> | Subject | Re: Kernel panic with Matsushita CD-ROM in 1.99.11 |
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On Tue, 4 Jun 1996, emoenke wrote: > > Hi Steffen Zahn, > > >Jun 4 18:21:04 zahn linux: Kernel panic: Matsushita CD-ROM controller #1: block not locked > > I suppose it is a compiler bug. I saw it sporadically with gcc-2.7.0, > and it seems gone under gcc-2.7.2. > Under 2.7.0, I could eliminate it by just putting additional, but "neutral" > statements around that "decision spot" in ll_rw_blk.c.
No, it might well be a real kernel bug. The low-level brw_page() stuff got changed to take care of _another_ potential bug in 1.99.11, and that made this older bug re-surface again. I think I nailed them both correctly in 1.99.12 (knock wood). I haven't actually ever seen any of the behaviour that some people report, but source code debugging certainly indicates that there could have been a real problem there..
In short, could you take a look at 2.0pre12, and see if the problem is gone? It should have happened _only_ under very heavy load (although a slow device like a CD-ROM or a floppy might have made it happen a lot more easily).
Linus
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