Re: [stable] Dirtiable inode bdi default != sb bdi btrfs

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On Fri, Sep 24, 2010 at 08:39:41PM +0200, Jens Axboe wrote:
> On 2010-09-23 22:53, Greg KH wrote:
> > On Thu, Sep 23, 2010 at 09:40:14PM +0200, Jens Axboe wrote:
> >> On 2010-09-23 21:38, Andrew Morton wrote:
> >>>
> >>> (Cc stable@xxxxxxxxxx)
> >>>
> >>> On Wed, 22 Sep 2010 21:54:30 -0300
> >>> Cesar Eduardo Barros <cesarb@xxxxxxxxxx> wrote:
> >>>
> >>>> This started appearing for me on v2.6.36-rc5-49-gc79bd89; it did not 
> >>>> happen on v2.6.36-rc5-33-g1ce1e41, probably because it does not have 
> >>>> commit 692ebd17c2905313fff3c504c249c6a0faad16ec which introduces the 
> >>>> warning.
> >>>>
> >>>> [...]
> >>>> device fsid 44d595920ddedfa-3ece6b56e80f689e devid 1 transid 22342 
> >>>> /dev/mapper/vg_cesarbinspiro-lv_home
> >>>> SELinux: initialized (dev dm-3, type btrfs), uses xattr
> >>>> ------------[ cut here ]------------
> >>>> WARNING: at fs/fs-writeback.c:87 inode_to_bdi+0x62/0x6d()
> >>>> Hardware name: Inspiron N4010
> >>>> Dirtiable inode bdi default != sb bdi btrfs
> >>>> Modules linked in: ipv6 kvm_intel kvm uinput arc4 ecb 
> >>>> snd_hda_codec_intelhdmi snd_hda_codec_realtek iwlagn snd_hda_intel 
> >>>> iwlcore snd_hda_codec uvcvideo snd_hwdep mac80211 videodev snd_seq 
> >>>> snd_seq_device v4l1_compat snd_pcm atl1c v4l2_compat_ioctl32 btusb 
> >>>> cfg80211 snd_timer i2c_i801 bluetooth iTCO_wdt dell_wmi dell_laptop snd 
> >>>> pcspkr wmi dcdbas shpchp iTCO_vendor_support soundcore snd_page_alloc 
> >>>> rfkill joydev microcode btrfs zlib_deflate libcrc32c cryptd aes_x86_64 
> >>>> aes_generic xts gf128mul dm_crypt usb_storage i915 drm_kms_helper drm 
> >>>> i2c_algo_bit i2c_core video output [last unloaded: scsi_wait_scan]
> >>>> Pid: 1073, comm: find Not tainted 2.6.36-rc5+ #8
> >>>> Call Trace:
> >>>>   [<ffffffff8104d0e4>] warn_slowpath_common+0x85/0x9d
> >>>>   [<ffffffff8104d19f>] warn_slowpath_fmt+0x46/0x48
> >>>>   [<ffffffff811308b7>] inode_to_bdi+0x62/0x6d
> >>>>   [<ffffffff81131b48>] __mark_inode_dirty+0xd0/0x177
> >>>>   [<ffffffff81127168>] touch_atime+0x107/0x12a
> >>>>   [<ffffffff81122384>] ? filldir+0x0/0xd0
> >>>>   [<ffffffff8112259b>] vfs_readdir+0x8d/0xb4
> >>>>   [<ffffffff8112270b>] sys_getdents+0x81/0xd1
> >>>>   [<ffffffff81009c72>] system_call_fastpath+0x16/0x1b
> >>>
> >>> Thanks.  692ebd17c2905313fff3c504c249c6a0faad16ec had a cc:stable in
> >>> the changelog.  I'd suggest it not be merged into -stable until this
> >>> regression is sorted out!
> >>
> >> It was just added, I'm discussing this with Chris on irc as I type this.
> >> But yes, lets not replace a regression with a new regression :-). So
> >> Greg, please hold off on these for a little while.
> > 
> > Ok, so which ones should I take out of the -stable tree?  Just this one:
> > 	692ebd17c2905313fff3c504c249c6a0faad16ec
> > or it and something else?
> 
> You can keep 1/2, just hold off on the one labeled:
> 
> bdi: Fix warnings in __mark_inode_dirty for /dev/zero and friends
> 
> for now. I'm off to Japan in the morning, perhaps Jan can comment
> if he's available.

Ok, now dropped, thanks.

greg k-h
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