Re: 1352 NUL bytes at the end of a page? (was Re: Assertion `s &&s->tree' failed: The saga continues.)

From: Linus Torvalds
Date: Sat May 15 2004 - 22:48:57 EST

On Sat, 15 May 2004, Linus Torvalds wrote:
> On Sat, 15 May 2004, Steven Cole wrote:
> >
> > In the spirit of 'rounding up the usual suspects', I'll unset CONFIG_PREEMT
> > and try again.
> Or it could be any number of other config options. Do you have anything
> else interesting enabled?

Ahh, looking at an earlier email I see that you have CONFIG_REGPARM=y too.

That could easily be pretty dangerous - there have been both compiler bugs
in this area, and just kernel bugs (missing "asmlinkage" things causing
bad calling conventions and really nasty bugs).

So please try without both PREEMPT and REGPARM. Considering that it's
apparently very repeatable for you, I'd be more inclined to worry about
REGPARM than PREEMPT, but it's best to try with both disabled.

I also worry about that PDC202XX controller, but that 1352 is a strange
number (divisible by 8, but not by a cacheline or 512-byte sector or
something like that), so it doesn't _sound_ like something like DMA
failure or chipset programming, but who the hell knows..

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