Date: Tue, 21 Aug 2001 12:09:16 +0100 From: Ian Dowse <iedowse@maths.tcd.ie> To: Doug Barton <DougB@DougBarton.net> Cc: freebsd-current@freebsd.org Subject: Re: Panic on 8/10 -current: sleeping process owns a mutex Message-ID: <200108211209.aa08853@salmon.maths.tcd.ie> In-Reply-To: Your message of "Sun, 12 Aug 2001 12:38:29 PDT." <3B76DB35.DB46C32F@DougBarton.net>
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In message <3B76DB35.DB46C32F@DougBarton.net>, Doug Barton writes:
>Immediately prior to the crash I was getting a lot of these on the console:
>
>Aug 12 01:00:52 <kern.crit> Master /boot/kernel/kernel:
>/usr/local/src/sys/kern/kern_synch.c:377: sleeping with "mountlist" locke
>d from /usr/local/src/sys/kern/vfs_syscalls.c:548
This should be fixed by revision 1.198 of vfs_syscalls.c. It could
only occur during unmount(), which is why it didn't show up more
often:
iedowse 2001/08/20 12:16:31 PDT
Modified files:
sys/kern vfs_syscalls.c
Log:
Avoid sleeping while holding a mutex in dounmount(). This problem
has existed for a long time, but I made it worse a few months ago
by by adding calls to VFS_ROOT() and checkdirs() in revision 1.179.
Also, remove the LK_REENABLE flag in the lockmgr() call; this flag
has been ignored by the lockmgr code for 4 years. This was the only
remaining mention of it apart from its definition.
Reviewed by: jhb
Ian
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