Date: Sat, 19 May 2001 21:56:26 -0400 From: Alfred Perlstein <bright@rush.net> To: Szilveszter Adam <sziszi@petra.hos.u-szeged.hu> Cc: current@FreeBSD.ORG Subject: Re: panic: mutex vm not owned... Message-ID: <20010519215626.W7118@superconductor.rush.net> In-Reply-To: <20010519225319.A10701@petra.hos.u-szeged.hu>; from sziszi@petra.hos.u-szeged.hu on Sat, May 19, 2001 at 10:53:19PM %2B0200 References: <20010519225319.A10701@petra.hos.u-szeged.hu>
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* Szilveszter Adam <sziszi@petra.hos.u-szeged.hu> [010519 16:53] wrote:
> Hello everybody,
>
> I guess I was just being too happy so it had to get me this time:-) I was
> building Mozilla when it struck. Today's -CURRENT, kernel & world in sync,
> no softupdates.
>
> panic: mutex vm not owned at ../../vm/vm_page.h:328
> Debugger("panic")
>
> Stopped at Debugger
>
> trace:
> Debugger
> panic
> _mtx_assert
> swp_pager_async_iodone
> _iodone
> bufdone
> bufdonebio
> ad_interrupt
> ata_intr
> fork_exit
> fork_trampoline
>
> Unfortunately, dumping still doesn't work, I get the old and familiar:
> dump ata0: resetting devices... panic: witness_restore: lock (sleep mutex)
> Giant not locked.
>
> So there is no crash dump.
Thanks for the traceback, can you apply this patch then try
to get your machine to swap?
Index: swap_pager.c
===================================================================
RCS file: /home/ncvs/src/sys/vm/swap_pager.c,v
retrieving revision 1.155
diff -u -r1.155 swap_pager.c
--- swap_pager.c 2001/05/19 01:28:08 1.155
+++ swap_pager.c 2001/05/20 01:58:06
@@ -1474,8 +1474,8 @@
*/
mtx_unlock(&Giant);
- mtx_lock(&vm_mtx);
swp_pager_async_iodone(bp);
+ mtx_lock(&vm_mtx);
splx(s);
}
@@ -1554,7 +1554,7 @@
/*
* remove the mapping for kernel virtual
*/
-
+ mtx_lock(&vm_mtx);
pmap_qremove((vm_offset_t)bp->b_data, bp->b_npages);
/*
@@ -1689,6 +1689,7 @@
if (object)
vm_object_pip_wakeupn(object, bp->b_npages);
+ mtx_unlock(&vm_mtx);
/*
* release the physical I/O buffer
*/
--
-Alfred Perlstein [alfred@freebsd.org]
Instead of asking why a piece of software is using "1970s technology,"
start asking why software is ignoring 30 years of accumulated wisdom.
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