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freebsd-skq/sys/kern
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Konstantin Belousov 57d07ca9f0 When callout_reset_on() cannot immediately migrate a callout since it 
is running on other cpu, the CALLOUT_PENDING flag is temporarily
cleared. Then, callout_stop() on this, in fact active, callout fails
because CALLOUT_PENDING is not set, and callout_stop() returns 0.

Now, in sleepq_check_timeout(), the failed callout_stop() causes the
sleepq code to execute mi_switch() without even setting the wmesg,
since the switch-out is supposed to be transient. In fact, the thread
is put off the CPU for full timeout interval, instead of being put on
runq immediately.  Until timeout fires, the process is unkillable for
obvious reasons.

Fix this by marking the migrating callouts with CALLOUT_DFRMIGRATION
flag. The flag is cleared by callout_stop_safe() when the function
detects a migration, besides returning the success. The softclock()
rechecks the flag for migrating callout and cancels its execution if
the flag was cleared meantime.

PR:	 misc/166340
Reported, debugging traces provided and tested by:
	Christian Esken <christian.esken trivago com>
Reviewed by:	 avg, jhb
MFC after:	 1 week
2012-05-03 10:38:02 +00:00
..
bus_if.m Add a new bus method, BUS_ADJUST_RESOURCE() that is intended to be a 2011-04-29 21:36:45 +00:00
capabilities.conf Add experimental support for process descriptors 2011-08-18 22:51:30 +00:00
clock_if.m
cpufreq_if.m
device_if.m Update comments for DEVICE_PROBE() to reflect that BUS_PROBE_DEFAULT is 2011-05-24 13:22:40 +00:00
genassym.sh
imgact_aout.c Do not trash the argv[0] pointer for an a.out process on amd64. 2011-06-16 22:00:59 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c ELF image can have several PT_NOTE program headers. Look for the ELF 2012-03-11 19:38:49 +00:00
imgact_gzip.c Fix misuse of the kernel map in miscellaneous image activators. 2012-02-17 23:47:16 +00:00
imgact_shell.c The execution of the shebang script requires putting interpreter path, 2011-03-06 22:59:30 +00:00
inflate.c
init_main.c TDF_* flags should be used with td_flags field and TDP_* flags should be used 2012-01-22 11:01:36 +00:00
init_sysent.c - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
kern_acct.c - Don't log messages saying that accounting is being disabled and enabled 2012-05-02 14:25:39 +00:00
kern_alq.c
kern_clock.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_clocksource.c Add kern.eventtimer.activetick tunable/sysctl, specifying whether each 2012-03-13 10:21:08 +00:00
kern_condvar.c Include the associated wait channel message for context switch ktrace 2012-04-20 15:32:36 +00:00
kern_conf.c Remove unneeded newline. It fits in 80 columns now. 2012-02-10 14:55:47 +00:00
kern_cons.c belatedly transfer copyrights from libkern/gets.c to kern_cons.c 2011-12-17 15:50:45 +00:00
kern_context.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_cpu.c Revert r175376 and tune cpufreq(4) frequency comparison logic instead. 2012-03-10 18:56:16 +00:00
kern_cpuset.c Add a missing curly bracket 2011-12-05 10:34:52 +00:00
kern_ctf.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
kern_descrip.c Return EBADF instead of EMFILE from dup2 when the second argument is 2012-04-11 14:08:09 +00:00
kern_dtrace.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_environment.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_et.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
kern_event.c - Add knlist_init_rw_reader() function to kqueue(9). 2012-03-26 09:34:17 +00:00
kern_exec.c Add a new sched_clear_name() method to the scheduler interface to clear 2012-03-08 19:41:05 +00:00
kern_exit.c When process exists, not only the children shall be reparented to 2012-04-02 19:35:36 +00:00
kern_fail.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_ffclock.c Revise the sysctl handling code and restructure the hierarchy of sysctls 2011-12-01 07:19:13 +00:00
kern_fork.c Currently, the debugger attached to the process executing vfork() does 2012-02-27 21:10:10 +00:00
kern_gzio.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
kern_hhook.c Staticize malloc types. 2011-04-13 11:28:46 +00:00
kern_idle.c On multi-core, multi-threaded PPC systems, it is important that the threads 2011-05-31 15:11:43 +00:00
kern_intr.c Export intrcnt correctly when running under 32-bit compatibility. 2012-03-09 22:30:54 +00:00
kern_jail.c Make racct and rctl correctly handle jail renaming. Previously 2012-03-06 11:05:50 +00:00
kern_khelp.c Use the full and proper company name for Swinburne University of Technology 2011-04-12 08:13:18 +00:00
kern_kthread.c Add a new sched_clear_name() method to the scheduler interface to clear 2012-03-08 19:41:05 +00:00
kern_ktr.c Use strchr() and strrchr(). 2012-01-02 12:12:10 +00:00
kern_ktrace.c Include the associated wait channel message for context switch ktrace 2012-04-20 15:32:36 +00:00
kern_linker.c If a linker file contains at least one module, but all of the modules 2012-04-12 14:49:25 +00:00
kern_lock.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_lockf.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_lockstat.c
kern_loginclass.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_malloc.c - Change contigmalloc() to use the vm_paddr_t type instead of an unsigned 2012-03-01 19:58:34 +00:00
kern_mbuf.c
kern_mib.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
kern_module.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_mtxpool.c
kern_mutex.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_ntptime.c Introduce the sysclock_getsnapshot() and sysclock_snap2bintime() KPIs. The 2011-12-24 01:32:01 +00:00
kern_osd.c
kern_physio.c Account i/o done on cdevs. 2010-11-25 20:05:11 +00:00
kern_pmc.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_poll.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
kern_priv.c
kern_proc.c Allow for the process information sysctls to accept a thread id in addition 2012-04-23 20:56:05 +00:00
kern_prot.c Fix a typo. (s/nessesary/necessary/) 2012-01-08 18:48:36 +00:00
kern_racct.c Stop treating system processes as special. This fixes panics 2012-04-17 14:31:02 +00:00
kern_rctl.c Stop treating system processes as special. This fixes panics 2012-04-17 14:31:02 +00:00
kern_resource.c Change kern.proc.rlimit sysctl to: 2012-01-22 20:25:00 +00:00
kern_rmlock.c panic: add a switch and infrastructure for stopping other CPUs in SMP case 2011-12-11 21:02:01 +00:00
kern_rwlock.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_sdt.c Instead of only iterating over the set of known SDT probes when sdt.ko is 2012-03-27 15:07:43 +00:00
kern_sema.c
kern_shutdown.c Avoid to check the same cache line/variable from all the locking 2012-01-28 14:00:21 +00:00
kern_sig.c Add thread-private flag to indicate that error value is already placed 2012-04-12 10:48:43 +00:00
kern_switch.c critical_exit: ignore td_owepreempt if kdb_active is set 2011-12-04 21:27:41 +00:00
kern_sx.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_synch.c Include the associated wait channel message for context switch ktrace 2012-04-20 15:32:36 +00:00
kern_syscalls.c Call chainevh callback when we are invoked with neither MOD_LOAD nor 2010-10-21 20:31:50 +00:00
kern_sysctl.c Handle spurious page faults that may occur in no-fault sections of the 2012-03-22 04:52:51 +00:00
kern_tc.c o) Add COMPAT_FREEBSD32 support for MIPS kernels using the n64 ABI with userlands 2012-03-03 08:19:18 +00:00
kern_thr.c Fix panic, triggered like this: "int main() { thr_exit(); }" 2012-04-17 13:44:40 +00:00
kern_thread.c Some small fixes to CPU accounting for threads: 2012-01-03 21:03:28 +00:00
kern_time.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_timeout.c When callout_reset_on() cannot immediately migrate a callout since it 2012-05-03 10:38:02 +00:00
kern_umtx.c Fix some style bugs introduced in a previous commit (r233045) 2012-04-14 23:53:31 +00:00
kern_uuid.c Convert all users of IF_ADDR_LOCK to use new locking macros that specify 2012-01-05 19:00:36 +00:00
kern_xxx.c
ksched.c Use p4prio_to_tsprio to calculate TS priority instead of using 2011-06-07 02:50:14 +00:00
link_elf_obj.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
link_elf.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
linker_if.m
Make.tags.inc Update tags build script 2011-07-10 00:53:04 +00:00
Makefile Continue to introduce Capsicum Capability Mode support: 2011-03-01 13:28:27 +00:00
makesyscalls.sh - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
md4c.c
md5c.c
p1003_1b.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
posix4_mib.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
sched_4bsd.c Add a new sched_clear_name() method to the scheduler interface to clear 2012-03-08 19:41:05 +00:00
sched_ule.c Microoptimize cpu_search(). 2012-04-09 18:24:58 +00:00
serdev_if.m
stack_protector.c
subr_acl_nfs4.c Fix bug where NFSv4 ACL enforcement code wouldn't unconditionally 2012-04-17 14:54:00 +00:00
subr_acl_posix1e.c Add module load/unload stubs. 2012-03-13 20:27:48 +00:00
subr_autoconf.c Retire PCONFIG and leave the priority of thread0 alone when waiting for 2011-01-06 22:09:37 +00:00
subr_blist.c - Fix typos s/(more|less) then|\1 than/ 2011-12-03 15:41:37 +00:00
subr_bufring.c
subr_bus.c Allow device_busy() and device_unbusy() to be invoked while a device is 2012-04-11 20:57:41 +00:00
subr_clock.c Improve style and wording of comments and sysctl descriptions [1]. 2011-01-09 14:34:56 +00:00
subr_devstat.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_disk.c
subr_eventhandler.c
subr_fattime.c
subr_firmware.c Use strdup() on the name (and free it when it's done) so non-static names 2012-04-13 04:22:42 +00:00
subr_hash.c Convert panic()s to KASSERT()s. This is an optimisation for 2012-01-23 16:31:46 +00:00
subr_hints.c Use strchr() and strrchr(). 2012-01-02 12:12:10 +00:00
subr_kdb.c - Extend the KDB interface to add a per-debugger callback to print a 2012-04-12 17:43:59 +00:00
subr_kobj.c As it turns out, r186347 actually is insufficient to avoid the use of the 2011-11-15 20:11:03 +00:00
subr_lock.c panic: add a switch and infrastructure for stopping other CPUs in SMP case 2011-12-11 21:02:01 +00:00
subr_log.c Add kqueue support to /dev/klog. 2012-02-01 14:34:52 +00:00
subr_mbpool.c
subr_mchain.c - Use uint8_t for the variable x and spell the size of the variable 2012-02-06 06:03:16 +00:00
subr_module.c Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE 2011-02-09 19:08:21 +00:00
subr_msgbuf.c - Clean up timestamps in msgbuf code. The timestamps should now be 2012-03-19 00:36:32 +00:00
subr_param.c Modestly increase the maximum allowed size of the kmem map on i386. 2011-03-23 16:38:29 +00:00
subr_pcpu.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
subr_power.c
subr_prf.c Fix double vision syndrome (read: double output) when in the 2011-10-16 14:16:46 +00:00
subr_prof.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_rman.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_rtc.c Core structure and functions to support a feed-forward clock within the kernel. 2011-11-19 14:10:16 +00:00
subr_sbuf.c r222015 introduced a new assertion that the size of a fixed-length sbuf 2011-08-19 08:29:10 +00:00
subr_scanf.c Xen netback driver rewrite. 2012-01-26 16:35:09 +00:00
subr_sglist.c
subr_sleepqueue.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_smp.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_stack.c Constify stack argument for functions that don't modify it. 2011-11-16 19:06:55 +00:00
subr_syscall.c Add thread-private flag to indicate that error value is already placed 2012-04-12 10:48:43 +00:00
subr_taskqueue.c Ensure that ta_pending doesn't overflow u_short by capping its value at USHRT_MAX. 2011-09-15 08:42:06 +00:00
subr_trap.c Include the associated wait channel message for context switch ktrace 2012-04-20 15:32:36 +00:00
subr_turnstile.c Fix a typo. 2012-04-14 23:59:58 +00:00
subr_uio.c Handle spurious page faults that may occur in no-fault sections of the 2012-03-22 04:52:51 +00:00
subr_unit.c Fix typos - remove duplicate "the". 2011-02-21 09:01:34 +00:00
subr_witness.c - Improve BPF locking model. 2012-04-06 06:53:58 +00:00
sys_capability.c Allways call fdrop(). 2012-03-12 11:56:57 +00:00
sys_generic.c Instead of incomplete handling of read(2)/write(2) return values that 2012-03-04 14:55:37 +00:00
sys_pipe.c - Implement pipe2 syscall for Linuxulator. This syscall appeared in 2.6.27 2012-04-16 21:22:02 +00:00
sys_procdesc.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
sys_process.c Allow the parent to gather the exit status of the children reparented 2012-02-23 11:50:23 +00:00
sys_socket.c Add the fo_chown and fo_chmod methods to struct fileops and use them 2011-08-16 20:07:47 +00:00
syscalls.c - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
syscalls.master - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
systrace_args.c - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
sysv_ipc.c
sysv_msg.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
sysv_sem.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
sysv_shm.c Close a race due to dropping of the map lock between creating a map entry 2012-02-19 00:28:49 +00:00
tty_compat.c
tty_info.c Fix whitespace inconsistencies in TTY code. 2012-02-06 18:15:46 +00:00
tty_inq.c Use strchr() and strrchr(). 2012-01-02 12:12:10 +00:00
tty_outq.c Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
tty_pts.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
tty_tty.c Finish r210923, 210926. Mark some devices as eternal. 2011-01-04 10:59:38 +00:00
tty_ttydisc.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
tty.c Also call the low-level driver if ->c_iflag & (IXON|IXOFF|IXANY) changes. 2012-02-26 20:56:49 +00:00
uipc_accf.c
uipc_cow.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
uipc_debug.c
uipc_domain.c Catch up with r195837 (2.5 years ago) which renamed net_add_domain() to domain_add(). 2012-02-23 17:47:19 +00:00
uipc_mbuf2.c
uipc_mbuf.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
uipc_mqueue.c Remove unused thread argument to vrecycle(). 2012-04-23 14:10:34 +00:00
uipc_sem.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
uipc_shm.c Export some more useful info about shared memory objects to userland 2012-04-01 18:22:48 +00:00
uipc_sockbuf.c Document a large number of currently undocumented sysctls. While here 2011-12-13 00:38:50 +00:00
uipc_socket.c - Remove redundant call to pr_ctloutput from code that handles SO_SETFIB. 2012-04-03 18:38:00 +00:00
uipc_syscalls.c Fix bugs which can result in a panic when an non-SCTP socket it 2012-03-15 14:13:38 +00:00
uipc_usrreq.c Introduce VOP_UNP_BIND(), VOP_UNP_CONNECT(), and VOP_UNP_DETACH() 2012-02-29 21:38:31 +00:00
vfs_acl.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
vfs_aio.c Add 32-bit compat code for AIO kevent flags introduced in revision 230857. 2012-02-05 04:49:31 +00:00
vfs_bio.c This change avoids a kernel deadlock on "snaplk" when using 2012-03-01 18:45:25 +00:00
vfs_cache.c Post r230394, the Lookup RPC counts for both NFS clients increased 2012-03-03 01:06:54 +00:00
vfs_cluster.c Unbreak detection of the async mode for clustered writes after r231075. 2012-02-08 15:07:19 +00:00
vfs_default.c Replace the MNT_VNODE_FOREACH interface with MNT_VNODE_FOREACH_ALL. 2012-04-17 16:28:22 +00:00
vfs_export.c
vfs_extattr.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
vfs_hash.c
vfs_init.c Modify vfs_register() to use a hash calculation 2011-09-13 21:01:26 +00:00
vfs_lookup.c Avoid double-unlock or double unreference for ndp->ni_dvp when the vnode dp 2012-01-01 18:45:59 +00:00
vfs_mount.c This change creates a new list of active vnodes associated with 2012-04-20 06:50:44 +00:00
vfs_mountroot.c Fix found places where uio_resid is truncated to int. 2012-02-21 01:05:12 +00:00
vfs_subr.c Remove unused thread argument to vrecycle(). 2012-04-23 14:10:34 +00:00
vfs_syscalls.c The value of flags matching VNOVAL can't be supported. Return EOPNOTSUPP 2012-04-20 10:08:30 +00:00
vfs_vnops.c Add KTR_VFS traces to track modifications to a vnode's writecount. 2012-03-08 20:27:20 +00:00
vnode_if.src Introduce VOP_UNP_BIND(), VOP_UNP_CONNECT(), and VOP_UNP_DETACH() 2012-02-29 21:38:31 +00:00