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 <[email protected]> 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 <[email protected]> > 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 <[email protected]> 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 [email protected] >> with a subject of "unsubscribe". Trouble? Contact >> [email protected] >> Archive: >> http://lists.debian.org/[email protected] >> > -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/caa9xbm6y0-512iqsk-cmmqf-wwkxssfcks4qszepkd94cnc...@mail.gmail.com
