The issue happened somewhere before the process exit. Try the patch
below, the idea is that your overflow count is really big, so the
wrong-doer could cause underflow when acting.
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index 19be4e0..fcdc6af 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -465,6 +465,9 @@ pmap_resident_count_dec(pmap_t pmap, int count)
{
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
+ KASSERT(pmap->pm_stats.resident_count >= count,
+ ("pmap %p resident count underflow %ld %d", pmap,
+ pmap->pm_stats.resident_count, count));
pmap->pm_stats.resident_count -= count;
}
Hi,
the assert doesn't happen (that's resident_count is not bigger than
count). You can find the complete core at:
https://dl.dropboxusercontent.com/u/2094962/core.txt.5
I'm no expert on that, but would this mean that the process, while
freeying mem, causes the kernel to free more maps than the process has?
Any other info during the panic, let me know (I have a second
machine and I can connect to it via serial port).
OTOH, in puzzled because the stack gets corrupted an thus I can't
check which is the offending process (I don't know if that would be of
any use in this situation). It is my understanding that isn't the
process who should be fixed but the kernel side. In this case the stack
corruption isn't that very important (at least this is what I think),
but sometimes it is very handy.
--
Salut i força,
Gustau
---------------------------------------------------------------------------
Prou top-posting : http://ca.wikipedia.org/wiki/Top-posting
Stop top-posting : http://en.wikipedia.org/wiki/Posting_style
O O O Gustau Pérez i Querol
O O O Unitat de Gestió dels departaments
O O O Matemàtica Aplicada IV i Enginyeria Telemàtica
Universitat Politècnica de Catalunya
Edifici C3 - Despatx S101-B
UPC Campus Nord UPC
C/ Jordi Girona, 1-3
08034 - Barcelona
_______________________________________________
[email protected] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to "[email protected]"
