Re: [bisected] Unstable desktop experience with kernel > 2.6.38
Hi,
Just to let you know that kernel 3.2.16-1 in today's Debian Testing
updates fixed the issue. Don't forget however the initramfs-tools
workaround (http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=638068#42).
Otherwise, you'll be left with an unbootable system.
Regards,
Emeric
2012/4/15 Émeric Maschino <emeric.maschino@gmail.com>:
> Hi,
>
> Patch proposed by Tony Luck in
> https://bugzilla.kernel.org/show_bug.cgi?id=42757 works for me :-)
>
> Bug report updated accordingly.
>
> Emeric
>
>
> Le 11 février 2012 16:54, Émeric Maschino <emeric.maschino@gmail.com> a écrit :
>> Hi,
>>
>> Time to track this issue:
>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=659485.
>>
>> I've also reported it upstream, as it's also present in non-Debian
>> kernel: https://bugzilla.kernel.org/show_bug.cgi?id=42757. Bug #659485
>> forwarded to this one to help tracking.
>>
>> Please add further comments either in upstream bug #42757 (if generic
>> issue) or bug #659485 if Debian-specific.
>>
>> Thanks,
>>
>> Émeric
>>
>>
>> Le 28 janvier 2012 20:21, Patrick Baggett <baggett.patrick@gmail.com> a écrit :
>>> From looking at:
>>>
>>> http://neil.brown.name/git?p=linux-2.6;a=blobdiff;f=arch/ia64/include/asm/futex.h;h=b0728404dad05c9349aea95d4e28b91b1b363a21;hp=c7f0f062239cd541112ecbe10cdd34dc54672eec;hb=37a9d912b24f96a0591773e6e6c3642991ae5a70;hpb=522d7decc0370070448a8c28982c8dfd8970489e
>>>
>>> It doesn't look like the return value (r8) is actually being set beyond
>>> initialized to 0. If there is some ia64 instruction that modifies it, GCC
>>> doesn't know about it from the inline assembly (r8 doesn't appear in the
>>> inputs/outputs list). From looking at the x86 version (agh, inline asm is
>>> hard to parse), it does modify the return value based on whether the
>>> comparison was a success or not, and the return value is certainly used by
>>> the callers.
>>>
>>> Patrick
>>>
>>> On Sat, Jan 28, 2012 at 6:43 AM, Émeric Maschino <emeric.maschino@gmail.com>
>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Just to let you know that I've bisected this issue to commit
>>>> 37a9d912b24f96a0591773e6e6c3642991ae5a70
>>>> (futex: Sanitize cmpxchg_futex_value_locked API).
>>>>
>>>> Émeric
>>>>
>>>>
>>>>
>>>> Le 17 janvier 2012 23:11, Émeric Maschino <emeric.maschino@gmail.com> a
>>>> écrit :
>>>> > Hi,
>>>> >
>>>> > Since there's a workaround allowing us to go kernel > 2.6.38
>>>> > (http://lists.debian.org/debian-ia64/2012/01/msg00013.html), I
>>>> > obviously updated my Testing system to current
>>>> > linux-image-3.1.0-1-mckinley_3.1.8-2_ia64.deb.
>>>> >
>>>> > Well, graphical desktop experience is _unstable_. When I say "desktop
>>>> > experience", I'm talking about basic desktop tasks, not fancy OpenGL
>>>> > rendering. I have at least two reproducible scenari (I'm running Gnome
>>>> > Classic):
>>>> > - random X restart while typing into a GNOME terminal window
>>>> > - Iceweasel killed when I try to click on the Back button or while
>>>> > trying to click on the Edit menu.
>>>> >
>>>> > For the latter one, I managed to get a stack trace with gdb, before
>>>> > gdb itself core dumped (huge core available if interested!) or X is
>>>> > restarted... It seems that something goes wrong with PulseAudio when
>>>> > running kernel 3.1:
>>>> >
>>>> > Program received signal SIGABRT, Aborted.
>>>> > [Switching to Thread 0x7002b5231e0 (LWP 2282)]
>>>> > 0xa000000000040721 in __kernel_syscall_via_break ()
>>>> >
>>>> > Thread 19 (Thread 0x7002b5231e0 (LWP 2282)):
>>>> > #0 0xa000000000040721 in __kernel_syscall_via_break ()
>>>> > No symbol table info available.
>>>> > #1 0x200000000031a900 in raise () from /lib/ia64-linux-gnu/libc.so.6.1
>>>> > No symbol table info available.
>>>> > #2 0x2000000000322eb0 in abort () from /lib/ia64-linux-gnu/libc.so.6.1
>>>> > No symbol table info available.
>>>> > #3 0x000007001612a310 in pa_mutex_unlock ()
>>>> > from /usr/lib/ia64-linux-gnu/libpulsecommon-1.0.so
>>>> > No symbol table info available.
>>>> > #4 0x000007001604f8b0 in poll_func ()
>>>> > from /usr/lib/ia64-linux-gnu/libpulse.so.0
>>>> > No symbol table info available.
>>>> >
>>>> > Rebooting my Testing system with good old kernel 2.6.38-5 brings a
>>>> > stable desktop experience back.
>>>> >
>>>> > I've performed regression testing: the issue is already there with
>>>> > linux-image-2.6.39-rc4-mckinley_2.6.39~rc4-1~experimental.1_ia64.deb,
>>>> > the immediate successor to
>>>> > linux-image-2.6.38-2-mckinley_2.6.38-5_ia64.deb in
>>>> > snapshot.debian.org. Latest available
>>>> > linux-image-3.2.0-rc7-mckinley_3.2~rc7-1~experimental.1_ia64.deb still
>>>> > provides unstable desktop experience.
>>>> >
>>>> > Does this sound familiar to someone? Is this problem already known and
>>>> > reported somewhere or is it worth filing a bug and going the git
>>>> > bisect route?
>>>> >
>>>> > Émeric
>>>>
>>>>
>>>> --
>>>> To UNSUBSCRIBE, email to debian-ia64-REQUEST@lists.debian.org
>>>> with a subject of "unsubscribe". Trouble? Contact
>>>> listmaster@lists.debian.org
>>>> Archive:
>>>> http://lists.debian.org/CAA9xbM5Gw5tZFOvtzykk8E8U6WKDfBEqrhBLM_As9qq7wqQ@mail.gmail.com
>>>>
>>>
Reply to: