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    SubjectRe: 2.6.18-rc5-mm1 + all hotfixes -- INFO: possible recursive locking detected
    On 9/5/06, Stefan Richter <stefanr@s5r6.in-berlin.de> wrote:
    > Miles Lane wrote:
    > > On 9/5/06, Andrew Morton <akpm@osdl.org> wrote:
    > >> On Tue, 5 Sep 2006 10:37:51 -0700
    > >> "Miles Lane" <miles.lane@gmail.com> wrote:
    > >>
    > >>> ieee1394: Node changed: 0-01:1023 -> 0-00:1023
    > >>> ieee1394: Node changed: 0-02:1023 -> 0-01:1023
    > >>> ieee1394: Node suspended: ID:BUS[0-00:1023] GUID[0080880002103eae]
    > >>>
    > >>> =============================================
    > >>> [ INFO: possible recursive locking detected ]
    > >>> 2.6.18-rc5-mm1 #2
    > >>> ---------------------------------------------
    > >>> knodemgrd_0/2321 is trying to acquire lock:
    > >>> (&s->rwsem){----}, at: [<f8958897>] nodemgr_probe_ne+0x311/0x38d [ieee1394]
    > >>>
    > >>> but task is already holding lock:
    > >>> (&s->rwsem){----}, at: [<f8959078>] nodemgr_host_thread+0x717/0x883 [ieee1394]
    >
    > How often does this happen?

    It seems to happen each time I plug in my JVC MiniDV camera (model GR-DVL9800U).

    > >> That's a 1394 glitch, possibly introduced by git-ieee1394.patch.
    > >
    > > Would you like me to verify that removing the patch fixes it, or
    > > should I wait for the 2.6.18-rc6-mm1 tree?
    >
    > My patches
    > "ieee1394: nodemgr: switch to kthread api, replace reset semaphore" and
    > "ieee1394: nodemgr: convert nodemgr_serialize semaphore to mutex"
    > may be relevant. They are included in git-ieee1394.patch.
    >
    > Could you revert them individually and test? It should be possible to
    > just "patch -p1 -R < ...." the following patchfiles:
    > http://me.in-berlin.de/~s5r6/linux1394/updates/2.6.18-rc5/patches/119-ieee1394-nodemgr-convert-nodemgr_serialize-semaphore-to-mutex.patch
    > If the problem persists, also revert
    > http://me.in-berlin.de/~s5r6/linux1394/updates/2.6.18-rc5/patches/118-ieee1394-nodemgr-switch-to-kthread-api--replace-reset-semaphore.patch
    >
    > If that does not help, install them again and unapply all ieee1394
    > patches from -mm. If you have the time.

    I am setting up to test with the first patch removed. The patch
    doesn't apply cleanly, but I suspect this is no big deal.

    patch -p1 -R < /home/miles/119-ieee1394-nodemgr-convert-nodemgr_serialize-semaphore-to-mutex.patch
    patching file drivers/ieee1394/nodemgr.c
    Hunk #2 succeeded at 1630 (offset 9 lines).
    Hunk #3 succeeded at 1659 (offset 9 lines).
    Hunk #4 succeeded at 1677 (offset 9 lines).
    -
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