Il Sun, Oct 08, 2006 at 08:33:37PM +0200, Stefan Seyfried ha scritto:
> Could it be that the pm_ops->finish(SUSPEND_MEM) is somehow running
> asynchronously? And that something in the hardware forbids accessing certain
> memory regions while the AML code is still executed? Just wild guessing :-)
>
> Or asked the other way round:
> "What exactly is forbidden while all processes but the suspend program are
> frozen?"
> If we know what is forbidden, we might find out what we are doing wrong.
>
> Or: "What conditions can cause the kernel to kill a process with signal 11"?
Since it's somewhat related to memory pressure: maybe (part of) the text
segment of either s2ram or glibc is evicted from memory or not yet
faulted in. Upon resume but before unfreeze() s2ram takes a page fault
but since no I/O can be started it just die. Make sense?
Can you try this patch:
Index: s2ram.c
===================================================================
RCS file: /cvsroot/suspend/suspend/s2ram.c,v
retrieving revision 1.45
diff -u -r1.45 s2ram.c
--- s2ram.c 20 Sep 2006 16:23:51 -0000 1.45
+++ s2ram.c 8 Oct 2006 22:04:21 -0000
@@ -10,6 +10,7 @@
#include <getopt.h>
#include <errno.h>
#include <string.h>
+#include <sys/mman.h>
#define S2RAM
#include "vbetool/vbetool.h"
@@ -326,6 +327,8 @@
usage();
}
+ mlockall(MCL_CURRENT | MCL_FUTURE);
+
if (!force) {
dmi_scan();
id = machine_match();
It makes sense to pin s2ram in memory, it will also help when e.g. the
disk doesn't come back to life after suspension.
Luca
--
"La teoria e` quando sappiamo come funzionano le cose ma non funzionano.
La pratica e` quando le cose funzionano ma non sappiamo perche`.
Abbiamo unito la teoria e la pratica: le cose non funzionano piu` e non
sappiamo il perche`." -- A. Einstein
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