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SubjectRe: rt14: strace -> migrate_disable_atomic imbalance
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On Wed, 2011-09-21 at 12:17 +0200, Mike Galbraith wrote:
> [ 144.212272] ------------[ cut here ]------------
> [ 144.212280] WARNING: at kernel/sched.c:6152 migrate_disable+0x1b6/0x200()
> [ 144.212282] Hardware name: MS-7502
> [ 144.212283] Modules linked in: snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd nfsd lockd parport_pc parport nfs_acl auth_rpcgss sunrpc bridge ipv6 stp cpufreq_conservative microcode cpufreq_ondemand cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf nls_iso8859_1 nls_cp437 vfat fat fuse ext3 jbd dm_mod usbmouse usb_storage usbhid snd_hda_codec_realtek usb_libusual uas sr_mod cdrom hid snd_hda_intel e1000e snd_hda_codec kvm_intel snd_hwdep sg snd_pcm kvm i2c_i801 snd_timer snd firewire_ohci firewire_core soundcore snd_page_alloc crc_itu_t button ext4 mbcache jbd2 crc16 uhci_hcd sd_mod ehci_hcd usbcore rtc_cmos ahci libahci libata scsi_mod fan processor thermal
> [ 144.212317] Pid: 6215, comm: strace Not tainted 3.0.4-rt14 #2052
> [ 144.212319] Call Trace:
> [ 144.212323] [<ffffffff8104662f>] warn_slowpath_common+0x7f/0xc0
> [ 144.212326] [<ffffffff8104668a>] warn_slowpath_null+0x1a/0x20
> [ 144.212328] [<ffffffff8103f606>] migrate_disable+0x1b6/0x200
> [ 144.212331] [<ffffffff8105a2a8>] ptrace_stop+0x128/0x240
> [ 144.212334] [<ffffffff81057b9b>] ? recalc_sigpending+0x1b/0x50
> [ 144.212337] [<ffffffff8105b6f1>] get_signal_to_deliver+0x211/0x530
> [ 144.212340] [<ffffffff81001835>] do_signal+0x75/0x7a0
> [ 144.212342] [<ffffffff8105ae68>] ? kill_pid_info+0x58/0x80
> [ 144.212344] [<ffffffff8105c34c>] ? sys_kill+0xac/0x1e0
> [ 144.212347] [<ffffffff81001fe5>] do_notify_resume+0x65/0x80
> [ 144.212350] [<ffffffff8135978b>] int_signal+0x12/0x17
> [ 144.212352] ---[ end trace 0000000000000002 ]---


Right, that's because of
53da1d9456fe7f87a920a78fdbdcf1225d197cb7, I think we simply want a full
revert of that for -rt.




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