From: Josef Bacik <jbacik@fb.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: kernel test robot <xiaolong.ye@intel.com>,
Al Viro <viro@zeniv.linux.org.uk>, Chris Mason <clm@fb.com>,
David Sterba <dsterba@suse.com>,
"J. Bruce Fields" <bfields@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, LKP <lkp@01.org>,
linux-btrfs <linux-btrfs@vger.kernel.org>,
Linux NFS Mailing List <linux-nfs@vger.kernel.org>
Subject: Re: [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} still in use (1) [unmount of btrfs vda]
Date: Wed, 10 Aug 2016 14:32:47 -0400 [thread overview]
Message-ID: <b7111dc6-a077-0100-1f99-2af09f126f73@fb.com> (raw)
In-Reply-To: <CA+55aFzdTMBc7f5=bQLRUtceu-Kg-MGmzWrAv1r96_ra8yutJA@mail.gmail.com>
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.
>
Looks like an NFS problem. Before in the !resfhp->fh_dentry case we would do a
lookup_one_len() and carry on. Now we do the lookup_one_len(), call into
nfsd_create_locked() and do a dget on resfhp->f_dentry, which from looks of it
is the dentry we just did a lookup_one_len() on, so we have one more ref on the
dentry than we did previously. Thanks,
Josef
WARNING: multiple messages have this Message-ID (diff)
From: Josef Bacik <jbacik@fb.com>
To: lkp@lists.01.org
Subject: Re: [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} still in use (1) [unmount of btrfs vda]
Date: Wed, 10 Aug 2016 14:32:47 -0400 [thread overview]
Message-ID: <b7111dc6-a077-0100-1f99-2af09f126f73@fb.com> (raw)
In-Reply-To: <CA+55aFzdTMBc7f5=bQLRUtceu-Kg-MGmzWrAv1r96_ra8yutJA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 791 bytes --]
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.
>
Looks like an NFS problem. Before in the !resfhp->fh_dentry case we would do a
lookup_one_len() and carry on. Now we do the lookup_one_len(), call into
nfsd_create_locked() and do a dget on resfhp->f_dentry, which from looks of it
is the dentry we just did a lookup_one_len() on, so we have one more ref on the
dentry than we did previously. Thanks,
Josef
next prev parent reply other threads:[~2016-08-10 18:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-10 5:39 [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} still in use (1) [unmount of btrfs vda] kernel test robot
2016-08-10 5:39 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " kernel test robot
2016-08-10 18:06 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Linus Torvalds
2016-08-10 18:06 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Linus Torvalds
2016-08-10 18:22 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Josef Bacik
2016-08-10 18:22 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Josef Bacik
2016-08-10 18:25 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Linus Torvalds
2016-08-10 18:25 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Linus Torvalds
2016-08-10 18:32 ` Josef Bacik [this message]
2016-08-10 18:32 ` Josef Bacik
2016-08-10 18:46 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Josef Bacik
2016-08-10 18:46 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Josef Bacik
2016-08-10 18:56 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Linus Torvalds
2016-08-10 18:56 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Linus Torvalds
2016-08-10 19:09 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " J. Bruce Fields
2016-08-10 19:09 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " J. Bruce Fields
2016-08-10 19:15 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Linus Torvalds
2016-08-10 19:15 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Linus Torvalds
2016-08-10 19:06 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Jeff Layton
2016-08-10 19:06 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Jeff Layton
2016-08-11 2:19 ` [lkp] [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f,n=0a} " Al Viro
2016-08-11 2:19 ` [nfsd] b44061d0b9: BUG: Dentry ffff880027d7c540{i=1846f, n=0a} " Al Viro
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