Date: Thu, 14 Jun 2001 20:21:22 -0700 (PDT) From: Simon Shapiro <shimon@simon-shapiro.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/28162: RELENG_4 (4.2, 4.3) Panics when system has 2GB of memory (SWAP) Message-ID: <200106150321.f5F3LM079019@freefall.freebsd.org>
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>Number: 28162
>Category: kern
>Synopsis: RELENG_4 (4.2, 4.3) Panics when system has 2GB of memory (SWAP)
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Jun 14 20:30:02 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Simon Shapiro
>Release: 4.2, 4.3, RELENG_4 (as of today)
>Organization:
>Environment:
FreeBSD nomis.simon-shapiro.org 4.3-20010522-STABLE FreeBSD 4.3-20010522-STABLE #10: Thu Jun 14 22:14:16 EDT 2001 root@:/usr/src/RELENG_4/src/sys/compile/NOMIS-smp i386
>Description:
/usr/src/sys/vm/swap_pager.c, line 310 or thereabout calls zinit.
zinit returns NULL because it calls zinita with too large a number.
I tried to force the value down but that only helps in SMP.
A UP kernel still crashes.
I forced the value down like this:
if ((swap_zone = zinit( "SWAPMETA", sizeof(struct swblock),
n, ZONE_INTERRUPT, 1 )) == NULL) {
int m = 127332; /* This number is from 256MB system */
printf("%s.%s(%d) ERROR: swap_zone is NULL\n"
" Reducing n from %d to %d\n",
__FILE__, __FUNCTION__, __LINE__,
n, m);
if ((swap_zone = zinit( "SWAPMETA", sizeof(struct swblock),
m, ZONE_INTERRUPT, 1 )) == NULL) {
panic("swap_pager_swap_init: swap_zone == NULL");
}
n = m; /* Prevents failure and panic */
}
NOTE: The above snippet is _not_ a fix.
>How-To-Repeat:
Boot on a Pentium III with 2 or 4 GB of RAM.
>Fix:
Not sure. The code needs to be re-written to examine how much
memory is really there. I did not have this problem, in the identical
machine, in RELENG_3.
>Release-Note:
>Audit-Trail:
>Unformatted:
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