Date: Thu, 12 Sep 2002 01:05:31 -0700 From: Maxime Henrion <mux@freebsd.org> To: Maxim Sobolev <sobomax@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: Panic during reboot in vflush() Message-ID: <20020912080531.GQ86074@elvis.mu.org> In-Reply-To: <3D8045D3.35A3DECE@FreeBSD.org> References: <3D8045D3.35A3DECE@FreeBSD.org>
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Maxim Sobolev wrote: > Any ideas? Looks like some other processes was modifying the mountlist while vfs_unmountall() was running. Is this an SMP box ? It would be nice if you could check in gdb which other process was holding the mountlist_mtx mutex if any. The vfs_unmountall() function doesn't acquire the mounstlist_mtx and states this is OK in a comment because this functions is ran upon reboot, but I suspect this is incorrect and we still need to do the locking. I'll write a patch tonight to add locking into vfs_unmountall(), but it may be hard to test unless you know of a way to reproduce this panic easily. Cheers, Maxime To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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