Re: Oops in __free_pages_ok (pre7-1) (Long)

[Andrea Arcangeli <andrea@suse.de>]

On 2 May 2000, Juan J. Quintela wrote:

><self package advertising> 
>I can reproduce this BUGs easily with the mmap002 program from the
>memtest-0.0.3 suite (http://carpanta.dc.fi.udc.es/~quintela/memtest/).
>You need to change the #define RAMSIZE to reflect your memory size in
>include file misc_lib.h and you run it in one while(true); do
>./mmap002; done and in the 8th, 9th execution it Oops here also.
></self package advertising>

I'll try this, thanks.

>If you want the patch for get rid of PG_swap_entry, I can do it and send
>it to you.

The PG_swap_entry isn't going to be the problem. However if you fear about
it try out this patch on top of 2.3.99-pre6. If PG_swap_entry is the
problem you'll get your problem fixed.

--- 2.3.99-pre6/mm/swapfile.c	Thu Apr 27 17:56:45 2000
+++ /tmp/swapfile.c	Tue May  2 23:57:24 2000
@@ -207,7 +207,7 @@
 	unsigned long offset, type;
 	swp_entry_t entry;
 
-	if (!PageSwapEntry(page))
+	if (1 || !PageSwapEntry(page))
 		goto new_swap_entry;
 
 	/* We have the old entry in the page offset still */

Just a thought, do you use NFS? If so please give a try without NFS
filesystem mounted. I should have addressed the NFS troubles in my current
tree but it's still under testing.

Andrea

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