https://github.com/torvalds/linux
Revision 3de463c7d9d58f8cf3395268230cb20a4c15bffa authored by Oleg Nesterov on 24 October 2005, 10:34:03 UTC, committed by Linus Torvalds on 24 October 2005, 15:12:35 UTC
do_exit() clears ->it_##clock##_expires, but nothing prevents
another cpu to attach the timer to exiting process after that.
After exit_notify() does 'write_unlock_irq(&tasklist_lock)' and
before do_exit() calls 'schedule() local timer interrupt can find
tsk->exit_state != 0. If that state was EXIT_DEAD (or another cpu
does sys_wait4) interrupted task has ->signal == NULL.
At this moment exiting task has no pending cpu timers, they were cleaned
up in __exit_signal()->posix_cpu_timers_exit{,_group}(), so we can just
return from irq.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent 108150e
Tip revision: 3de463c7d9d58f8cf3395268230cb20a4c15bffa authored by Oleg Nesterov on 24 October 2005, 10:34:03 UTC
[PATCH] posix-timers: remove false BUG_ON() from run_posix_cpu_timers()
[PATCH] posix-timers: remove false BUG_ON() from run_posix_cpu_timers()
Tip revision: 3de463c
| File | Mode | Size |
|---|---|---|
| DocBook | ||
| RCU | ||
| aoe | ||
| arm | ||
| block | ||
| cdrom | ||
| connector | ||
| cpu-freq | ||
| cris | ||
| crypto | ||
| device-mapper | ||
| driver-model | ||
| dvb | ||
| early-userspace | ||
| fb | ||
| filesystems | ||
| firmware_class | ||
| fujitsu | ||
| hwmon | ||
| i2c | ||
| i2o | ||
| i386 | ||
| ia64 | ||
| infiniband | ||
| input | ||
| ioctl | ||
| isdn | ||
| kbuild | ||
| kdump | ||
| m68k | ||
| mips | ||
| networking | ||
| parisc | ||
| pcmcia | ||
| power | ||
| powerpc | ||
| s390 | ||
| scsi | ||
| serial | ||
| sh | ||
| sound | ||
| sparc | ||
| sysctl | ||
| telephony | ||
| uml | ||
| usb | ||
| video4linux | ||
| vm | ||
| w1 | ||
| watchdog | ||
| x86_64 | ||
| 00-INDEX | -rw-r--r-- | 10.1 KB |
| BUG-HUNTING | -rw-r--r-- | 3.6 KB |
| Changes | -rw-r--r-- | 12.9 KB |
| CodingStyle | -rw-r--r-- | 15.9 KB |
| DMA-API.txt | -rw-r--r-- | 19.9 KB |
| DMA-ISA-LPC.txt | -rw-r--r-- | 5.2 KB |
| DMA-mapping.txt | -rw-r--r-- | 31.2 KB |
| IO-mapping.txt | -rw-r--r-- | 7.8 KB |
| IPMI.txt | -rw-r--r-- | 24.6 KB |
| IRQ-affinity.txt | -rw-r--r-- | 1.3 KB |
| MSI-HOWTO.txt | -rw-r--r-- | 22.5 KB |
| ManagementStyle | -rw-r--r-- | 12.9 KB |
| PCIEBUS-HOWTO.txt | -rw-r--r-- | 8.6 KB |
| README.DAC960 | -rw-r--r-- | 33.9 KB |
| README.cycladesZ | -rw-r--r-- | 293 bytes |
| SAK.txt | -rw-r--r-- | 2.9 KB |
| SecurityBugs | -rw-r--r-- | 1.8 KB |
| SubmittingDrivers | -rw-r--r-- | 5.4 KB |
| SubmittingPatches | -rw-r--r-- | 16.3 KB |
| VGA-softcursor.txt | -rw-r--r-- | 2.0 KB |
| acpi-hotkey.txt | -rw-r--r-- | 1.3 KB |
| applying-patches.txt | -rw-r--r-- | 18.7 KB |
| atomic_ops.txt | -rw-r--r-- | 14.8 KB |
| basic_profiling.txt | -rw-r--r-- | 1.7 KB |
| binfmt_misc.txt | -rw-r--r-- | 6.0 KB |
| cachetlb.txt | -rw-r--r-- | 16.0 KB |
| cciss.txt | -rw-r--r-- | 4.8 KB |
| cli-sti-removal.txt | -rw-r--r-- | 3.9 KB |
| computone.txt | -rw-r--r-- | 20.3 KB |
| cpqarray.txt | -rw-r--r-- | 2.2 KB |
| cpusets.txt | -rw-r--r-- | 17.9 KB |
| dcdbas.txt | -rw-r--r-- | 3.6 KB |
| debugging-modules.txt | -rw-r--r-- | 759 bytes |
| dell_rbu.txt | -rw-r--r-- | 4.9 KB |
| devices.txt | -rw-r--r-- | 111.5 KB |
| digiepca.txt | -rw-r--r-- | 3.7 KB |
| dnotify.txt | -rw-r--r-- | 3.5 KB |
| dontdiff | -rw-r--r-- | 1.3 KB |
| eisa.txt | -rw-r--r-- | 7.1 KB |
| exception.txt | -rw-r--r-- | 12.1 KB |
| feature-removal-schedule.txt | -rw-r--r-- | 3.9 KB |
| floppy.txt | -rw-r--r-- | 8.3 KB |
| ftape.txt | -rw-r--r-- | 10.7 KB |
| hayes-esp.txt | -rw-r--r-- | 6.5 KB |
| highuid.txt | -rw-r--r-- | 2.5 KB |
| hpet.txt | -rw-r--r-- | 6.4 KB |
| hw_random.txt | -rw-r--r-- | 2.6 KB |
| ibm-acpi.txt | -rw-r--r-- | 26.0 KB |
| ide.txt | -rw-r--r-- | 15.4 KB |
| initrd.txt | -rw-r--r-- | 13.1 KB |
| io_ordering.txt | -rw-r--r-- | 1.9 KB |
| ioctl-number.txt | -rw-r--r-- | 7.0 KB |
| iostats.txt | -rw-r--r-- | 7.1 KB |
| isapnp.txt | -rw-r--r-- | 433 bytes |
| java.txt | -rw-r--r-- | 10.7 KB |
| kernel-doc-nano-HOWTO.txt | -rw-r--r-- | 4.3 KB |
| kernel-docs.txt | -rw-r--r-- | 35.7 KB |
| kernel-parameters.txt | -rw-r--r-- | 44.1 KB |
| keys-request-key.txt | -rw-r--r-- | 6.1 KB |
| keys.txt | -rw-r--r-- | 37.5 KB |
| kobject.txt | -rw-r--r-- | 11.3 KB |
| kprobes.txt | -rw-r--r-- | 21.2 KB |
| kref.txt | -rw-r--r-- | 6.1 KB |
| laptop-mode.txt | -rw-r--r-- | 30.7 KB |
| ldm.txt | -rw-r--r-- | 3.6 KB |
| locks.txt | -rw-r--r-- | 3.4 KB |
| logo.gif | -rw-r--r-- | 16.0 KB |
| logo.txt | -rw-r--r-- | 563 bytes |
| magic-number.txt | -rw-r--r-- | 9.9 KB |
| mandatory.txt | -rw-r--r-- | 7.1 KB |
| mca.txt | -rw-r--r-- | 11.5 KB |
| md.txt | -rw-r--r-- | 4.0 KB |
| memory.txt | -rw-r--r-- | 2.1 KB |
| mono.txt | -rw-r--r-- | 2.5 KB |
| moxa-smartio | -rw-r--r-- | 16.3 KB |
| mtrr.txt | -rw-r--r-- | 9.6 KB |
| nbd.txt | -rw-r--r-- | 1.9 KB |
| nfsroot.txt | -rw-r--r-- | 7.8 KB |
| nmi_watchdog.txt | -rw-r--r-- | 4.2 KB |
| nommu-mmap.txt | -rw-r--r-- | 8.7 KB |
| numastat.txt | -rw-r--r-- | 861 bytes |
| oops-tracing.txt | -rw-r--r-- | 11.0 KB |
| paride.txt | -rw-r--r-- | 16.7 KB |
| parport-lowlevel.txt | -rw-r--r-- | 32.5 KB |
| parport.txt | -rw-r--r-- | 8.8 KB |
| pci.txt | -rw-r--r-- | 11.8 KB |
| pm.txt | -rw-r--r-- | 9.7 KB |
| pnp.txt | -rw-r--r-- | 6.6 KB |
| preempt-locking.txt | -rw-r--r-- | 5.2 KB |
| prio_tree.txt | -rw-r--r-- | 5.2 KB |
| ramdisk.txt | -rw-r--r-- | 6.3 KB |
| riscom8.txt | -rw-r--r-- | 1.3 KB |
| rocket.txt | -rw-r--r-- | 7.6 KB |
| rpc-cache.txt | -rw-r--r-- | 7.1 KB |
| rtc.txt | -rw-r--r-- | 8.1 KB |
| sched-coding.txt | -rw-r--r-- | 4.0 KB |
| sched-design.txt | -rw-r--r-- | 7.7 KB |
| sched-domains.txt | -rw-r--r-- | 3.6 KB |
| sched-stats.txt | -rw-r--r-- | 7.0 KB |
| seclvl.txt | -rw-r--r-- | 3.0 KB |
| serial-console.txt | -rw-r--r-- | 3.8 KB |
| sgi-ioc4.txt | -rw-r--r-- | 2.0 KB |
| sgi-visws.txt | -rw-r--r-- | 678 bytes |
| smart-config.txt | -rw-r--r-- | 3.1 KB |
| smp.txt | -rw-r--r-- | 844 bytes |
| sonypi.txt | -rw-r--r-- | 6.2 KB |
| sparse.txt | -rw-r--r-- | 2.3 KB |
| specialix.txt | -rw-r--r-- | 14.8 KB |
| spinlocks.txt | -rw-r--r-- | 8.4 KB |
| stable_api_nonsense.txt | -rw-r--r-- | 9.3 KB |
| stable_kernel_rules.txt | -rw-r--r-- | 2.5 KB |
| stallion.txt | -rw-r--r-- | 17.6 KB |
| svga.txt | -rw-r--r-- | 14.1 KB |
| sx.txt | -rw-r--r-- | 11.3 KB |
| sysrq.txt | -rw-r--r-- | 10.2 KB |
| time_interpolators.txt | -rw-r--r-- | 1.4 KB |
| tipar.txt | -rw-r--r-- | 2.8 KB |
| tty.txt | -rw-r--r-- | 7.3 KB |
| unicode.txt | -rw-r--r-- | 6.5 KB |
| voyager.txt | -rw-r--r-- | 3.4 KB |
| xterm-linux.xpm | -rw-r--r-- | 3.5 KB |
| zorro.txt | -rw-r--r-- | 2.8 KB |
Computing file changes ...
