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SubjectRe: Linux v2.6.21-rc3

[ Ingo and Thomas added to Cc, because I think this is them.. ]

Ingo, I think this came in during commit 95492e4646, "x86: rewrite SMP TSC
sync code".

(Leaving the original message quoted in full for Ingo and Thomas, sorry
for the waste of bandwidth)

Linus

---
On Wed, 7 Mar 2007, Michal Piotrowski wrote:
> I get this while
> echo shutdown > /sys/power/disk; echo disk > /sys/power/state
>
> BUG: using smp_processor_id() in preemptible [00000001] code: swsusp_shutdown/3359
> caller is check_tsc_sync_source+0x1b/0xef
> [<c010503d>] show_trace_log_lvl+0x1a/0x2f
> [<c0105724>] show_trace+0x12/0x14
> [<c01057d6>] dump_stack+0x16/0x18
> [<c01f835e>] debug_smp_processor_id+0xa2/0xb4
> [<c0113cc5>] check_tsc_sync_source+0x1b/0xef
> [<c011367d>] __cpu_up+0x136/0x158
> [<c0141aec>] _cpu_up+0x74/0xbf
> [<c0141b5d>] cpu_up+0x26/0x38
> [<c0141bbc>] enable_nonboot_cpus+0x4d/0x9a
> [<c0146ae0>] pm_suspend_disk+0x11c/0x210
> [<c014597e>] enter_state+0x50/0x1d0
> [<c0145b84>] state_store+0x86/0x9c
> [<c01a53d0>] subsys_attr_store+0x20/0x25
> [<c01a54ea>] sysfs_write_file+0xc1/0xe9
> [<c017199b>] vfs_write+0xaf/0x138
> [<c0171f65>] sys_write+0x3d/0x61
> [<c0104064>] syscall_call+0x7/0xb
> =======================
>
> l *check_tsc_sync_source+0x1b/0xef
> 0xc0113caa is in check_tsc_sync_source (/mnt/md0/devel/linux-git/arch/i386/kernel/../../x86_64/kernel/tsc_sync.c:99).
> 94 /*
> 95 * Source CPU calls into this - it waits for the freshly booted
> 96 * target CPU to arrive and then starts the measurement:
> 97 */
> 98 void __cpuinit check_tsc_sync_source(int cpu)
> 99 {
> 100 int cpus = 2;
> 101
> 102 /*
> 103 * No need to check if we already know that the TSC is not
>
> echo platform > /sys/power/disk; echo disk > /sys/power/state
> doesn't work (as always).
>
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc3/boot.log
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc3/git-config
>
> Regards,
> Michal
>
> --
> Michal K. K. Piotrowski
> LTG - Linux Testers Group (PL)
> (http://www.stardust.webpages.pl/ltg/)
> LTG - Linux Testers Group (EN)
> (http://www.stardust.webpages.pl/linux_testers_group_en/)
>
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