Date: Thu, 12 Sep 2002 20:09:26 +0300 From: Maxim Sobolev <sobomax@FreeBSD.org> To: Maxime Henrion <mux@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: Panic during reboot in vflush() Message-ID: <3D80CA46.1AF0CA4A@FreeBSD.org> References: <3D8045D3.35A3DECE@FreeBSD.org> <20020912080531.GQ86074@elvis.mu.org>
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Maxime Henrion wrote: > > Maxim Sobolev wrote: > > Any ideas? > > Looks like some other processes was modifying the mountlist while > vfs_unmountall() was running. Is this an SMP box ? No, it's UP. > It would be nice if > you could check in gdb which other process was holding the mountlist_mtx > mutex if any. Sure, if you will provide me with instruction on how to do in. > 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. No, I don't. It's the first time I've encountered this particular problem. -Maxim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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