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Re: kern/48411: repeatable SMP crashes in amd64-current

The following reply was made to PR kern/48411; it has been noted by GNATS.

From: "J. Hannken-Illjes" <>
Subject: Re: kern/48411: repeatable SMP crashes in amd64-current
Date: Thu, 28 Nov 2013 21:40:12 +0100

 On Nov 28, 2013, at 6:55 PM, David Holland 
<> =
 > On Thu, Nov 28, 2013 at 05:05:01PM +0000, J. Hannken-Illjes wrote:
 >>>> Entering layer_node_find() with a locked vnode has to go -- =
 >>>> this means VOP_LOOKUP() has to return an unlocked vnode.
 >>> That isn't unfortunate; it just takes some work to get organized.
 >> So to make the list complete: lookup, create, mknod, mkdir, symlink =
 >> bmap return locked vnodes and would need changing.
 > Except for bmap the rest of those should not cause any (extra)
 > problems. bmap I'm not sure about; it's a mess pertaining to device
 > vnodes.
 As bmap returns the device we are mounted on and this device usually
 gets used only by strategy I would not expect big problems here.
 J. Hannken-Illjes - - TU Braunschweig 

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