Date: Fri, 28 Jun 2002 11:14:14 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Dave Hayes <dave@jetcafe.org> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: panic: vm_object_terminate: freeing busy page 0xc0fbcdc4 Message-ID: <200206281814.g5SIEEqF006106@apollo.backplane.com> References: <200206281753.g5SHro029967@hokkshideh2.jetcafe.org>
next in thread | previous in thread | raw e-mail | index | archive | help
:
:Matthew Dillon <dillon@apollo.backplane.com> writes:
:> I have no idea what 4.5-p4 is. Is it RELENG_4 (stable) or RELENG_4_5
:> (the security branch), and what was the build date?
:
:It's RELENG_4_5 (the security branch) but the 4th patched release of
:that, build date is:
:
:..
:> the best thing to do is probably to upgrade to the latest -stable.
:
:Ahhh, ok. Thanks a bunch, there -is- a fix. =)
:------
:Dave Hayes - Consultant - Altadena CA, USA - dave@jetcafe.org
Hi Dave. I found the original thread. Tor found a bug that he
fixed which I've included below. I believe the vm_object_terminate():
freeing busy page problem may be related.
In anycase, this bug was fixed in 1.147.2.16 in -stable. RELENG_4_5
was forked off at 1.147.2.13.
I don't know if upgrading will fix your problem but there's a chance
that it will. If it doesn't we'll work through getting a kernel dump
and investigating further.
-Matt
: (Original message from Tor)
:Subject: Patch to solve panic when reading from raw devices
:Date: Sun, 17 Feb 2002 23:33:51 GMT
:...
:It is currently possible to crash the system when reading from raw
:devices if the program is using aio or linuxthreads:
:
: vm_page_free: pindex(0), busy(0), PG_BUSY(1), hold(1)
: panic: vm_page_free: freeing busy page
: cpuid = 1; lapic.id = 00000000
: Debugger("panic")
: Stopped at Debugger+0x41: xorl %eax,%eax
:
:This happens if the memory is unmapped before the read has completed,
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200206281814.g5SIEEqF006106>