lkml.org 
[lkml]   [1996]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Kernel panic with Matsushita CD-ROM in 1.99.11


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


\
 
 \ /
  Last update: 2005-03-22 13:37    [W:0.127 / U:0.552 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site