Re: 2.4.0-test8-pre1 is quite bad / how about integrating Rik's VMnow?

[Rik van Riel]

On Sat, 2 Sep 2000, Linus Torvalds wrote:
> On Sat, 2 Sep 2000, Rik van Riel wrote:

> > 1) the innd data corruption bug
> 
> This, I think, was due to a bug in ext2 truncate. If so, it
> should be fixed in test8-pre2.

Cool...

> > 2) system hangs with 0 free low memory and some free
> >    high memory
> > 
> > The lru_cache_add() BUG() seems to be defanged for now and
> > isn't very high priority to me...
> 
> I'd like to know what it was. Last I heard, it was still the
> case of "pages just off the freelist had some bits set that they
> shouldn't have". That makes me nervous.

Nope, that was what you /thought/ it was.

My debugging code has shown it to be something else,
lru_cache_add() is called for pages which are already
on the LRU list...

I know this because:
1) the boobytraps in rmqueue() and page_reclaim() never
   trigger
2) the ->next->prev pointer is /consistent/ (this wouldn't
   be the case after a list_del and being hauled through
   rmqueue, etc...)

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
       -- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/               http://www.surriel.com/

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