Messages in this thread | | | Date | Thu, 11 Aug 2016 03:19:09 +0100 | From | Al Viro <> | Subject | Re: [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} still in use (1) [unmount of btrfs vda] |
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On Wed, Aug 10, 2016 at 02:46:27PM -0400, Josef Bacik wrote: > On 08/10/2016 02:25 PM, Linus Torvalds wrote: > > On Wed, Aug 10, 2016 at 11:22 AM, Josef Bacik <jbacik@fb.com> wrote: > > > On 08/10/2016 02:06 PM, Linus Torvalds wrote: > > > > > > > > More information in the original email on lkml. > > > > > > I'm not subscribed to lkml and for some reason I can't find the original > > > email in any of the lkml/linux-nfs archives. Could you forward more of the > > > details? > > > > Done. > > > > So my naive fix would be something like this > > > From: Josef Bacik <jbacik@fb.com> > Date: Wed, 10 Aug 2016 14:43:08 -0400 > Subject: [PATCH] nfsd: fix dentry refcounting problem > > b44061d0b9 introduced a dentry ref counting bug, previously we were grabbing one > ref to dchild in nfsd_create(), but with the creation of nfsd_create_locked() we > have a ref for dchild from the lookup in nfsd_create(), and then another ref in > nfsd_create_locked(). The ref from the lookup in nfsd_create() is never dropped > and results in dentries still in use at unmount. > > Signed-off-by: Josef Bacik <jbacik@fb.com>
[sorry, had been off-line since yesterday]
Patch looks sane; feel free to slap Acked-by: Al Viro <viro@zeniv.linux.org.uk> on it. I think it should go through nfsd tree.
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