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From
SubjectRe: Linux 2.4.5-ac15
On Tue, 19 Jun 2001, Walter Hofmann wrote:
> On Sun, 17 Jun 2001, Walter Hofmann wrote:
>
> > I had already two crashes with ac15. The system was still ping-able, but
> > login over the network didn't work anymore.
> >
> > The first crash happened after I started xosview and noticed that the
> > system almost used up the swap (for no apparent reason). The second
> > crash happened shortly after I started fsck on a crypto-loop device.
>
> FWIW, here is the vmstat output for the second (short) hang. Taken with
> ac14, vmstat 1 was started (long) before the hang and interrupted about
> five seconds after it. The machine has 128MB RAM and 256MB swap.

> procs memory swap io system cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 1 0 0 77000 1464 18444 67324 8 0 152 224 386 1345 26 19 55
> 2 4 2 77084 1524 18396 66904 0 1876 108 2220 2464 66079 1 98 1

Does the following patch help with this problem, or are
you both experiencing something unrelated to this particular
buglet ?

regards,

Rik
--
Executive summary of a recent Microsoft press release:
"we are concerned about the GNU General Public License (GPL)"

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


--- linux/mm/swapfile.c.~1~ Thu May 3 16:34:46 2001
+++ linux/mm/swapfile.c Thu May 3 16:36:07 2001
@@ -67,8 +67,14 @@
}
/* No luck, so now go finegrined as usual. -Andrea */
for (offset = si->lowest_bit; offset <= si->highest_bit ; offset++) {
- if (si->swap_map[offset])
+ if (si->swap_map[offset]) {
+ /* Any full pages we find we should avoid
+ * looking at next time. */
+ if (offset == si->lowest_bit)
+ si->lowest_bit++;
continue;
+ }
+
got_page:
if (offset == si->lowest_bit)
si->lowest_bit++;
@@ -79,6 +85,7 @@
si->cluster_next = offset+1;
return offset;
}
+ si->highest_bit = 0;
return 0;
}

-
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