Messages in this thread | | | Date | Mon, 25 Oct 2004 16:03:30 +0200 | From | Florian Schmidt <> | Subject | Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0 |
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On Mon, 25 Oct 2004 15:26:05 +0200 Ingo Molnar <mingo@elte.hu> wrote:
> does the patch below fix this?
looks like it. they didn't show on first boot of the new kernel with patch applied.
Btw: i still experience some "pauses". They are different now though. It seems i can trigger them by reloading a page in mozilla (not always). This BUG definetly looks related. Dunno, when exactly it happened (related to what i did at that moment), but it's the only one in dmesg output on this bootup. Each of the pauses is accompanied by a high cpu usage of ksoftirqd. I cannot retrigger the BUG though.
mozilla-bin/763: BUG in futex_wait at kernel/futex.c:542 [<c0132962>] futex_wait+0x192/0x1a0 (12) [<c0131c55>] sub_preempt_count+0x65/0xd0 (64) [<c01ef17b>] __up_write+0x13b/0x320 (8) [<c0131788>] check_preempt_timing+0x58/0x290 (8) [<c0131c55>] sub_preempt_count+0x65/0xd0 (4) [<c01ef17b>] __up_write+0x13b/0x320 (4) [<c02b94d3>] down_read+0xd3/0x2b0 (8) [<c0131c55>] sub_preempt_count+0x65/0xd0 (4) [<c01eef11>] up_read+0x111/0x240 (8) [<c0131788>] check_preempt_timing+0x58/0x290 (8) [<c0131c55>] sub_preempt_count+0x65/0xd0 (4) [<c01eef11>] up_read+0x111/0x240 (4) [<c0115f60>] default_wake_function+0x0/0x20 (104) [<c0115f60>] default_wake_function+0x0/0x20 (32) [<c0132c17>] do_futex+0x47/0xa0 (40) [<c0132d60>] sys_futex+0xf0/0x100 (40) [<c010617b>] syscall_call+0x7/0xb (68) preempt count: 00000001 . 1-level deep critical section nesting: .. entry 1: print_traces+0x17/0x90 [<c0131fc7>] / (dump_stack+0x23/0x30 [<c0106733>])
Here's the syslog entry:
Oct 25 15:56:31 mango kernel: mozilla-bin/763: BUG in futex_wait at kernel/futex.c:542 Oct 25 15:56:31 mango kernel: [futex_requeue+162/608] futex_wait+0x192/0x1a0 (12) Oct 25 15:56:31 mango kernel: [print_name_offset+149/160] sub_preempt_count+0x65/0xd0 (64) Oct 25 15:56:31 mango kernel: [zlib_inflateReset+43/128] __up_write+0x13b/0x320 (8) Oct 25 15:56:31 mango kernel: [kfifo_alloc+216/240] check_preempt_timing+0x58/0x290 (8) Oct 25 15:56:31 mango kernel: [print_name_offset+149/160] sub_preempt_count+0x65/0xd0 (4) Oct 25 15:56:31 mango kernel: [zlib_inflateReset+43/128] __up_write+0x13b/0x320 (4) Oct 25 15:56:31 mango kernel: [__func__.0+318/987] down_read+0xd3/0x2b0 (8) Oct 25 15:56:31 mango kernel: [print_name_offset+149/160] sub_preempt_count+0x65/0xd0 (4) Oct 25 15:56:31 mango kernel: [zlib_inflate_fast+465/1024] up_read+0x111/0x240 (8) Oct 25 15:56:31 mango kernel: [kfifo_alloc+216/240] check_preempt_timing+0x58/0x290 (8) Oct 25 15:56:31 mango kernel: [print_name_offset+149/160] sub_preempt_count+0x65/0xd0 (4) Oct 25 15:56:31 mango kernel: [zlib_inflate_fast+465/1024] up_read+0x111/0x240 (4) Oct 25 15:56:31 mango kernel: [wake_up_process+32/48] default_wake_function+0x0/0x20 (104) Oct 25 15:56:31 mango kernel: [wake_up_process+32/48] default_wake_function+0x0/0x20 (32) Oct 25 15:56:31 mango kernel: [unqueue_me+103/256] do_futex+0x47/0xa0 (40) Oct 25 15:56:31 mango kernel: [futex_wait+176/400] sys_futex+0xf0/0x100 (40) Oct 25 15:56:31 mango kernel: [irq_entries_start+107/128] syscall_call+0x7/0xb (68) Oct 25 15:56:31 mango kernel: preempt count: 00000001 Oct 25 15:56:31 mango kernel: . 1-level deep critical section nesting: Oct 25 15:56:31 mango kernel: .. entry 1: print_traces+0x17/0x90 [update_max_trace+23/160] / (dump_stack+0x23/0x30 [show_registers+131/464]) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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