lkml.org 
[lkml]   [2007]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [BUG] Strange 1-second pauses during Resume-from-RAM

    * Jörn Engel <joern@logfs.org> wrote:

    > On Sun, 2 December 2007 09:56:08 +0100, Ingo Molnar wrote:
    > > * Jörn Engel <joern@logfs.org> wrote:
    > >
    > > > > ah. You should mark pit_read() function as notrace. PIT clocksource
    > > > > is rare. (add the 'notrace' word to the function prototype)
    > > >
    > > > Hardly a change at all. Apart from some offsets, this dump is
    > > > identical.
    > > >
    > > > stopped custom tracer.
    > > > BUG: spinlock recursion on CPU#0, sh/954
    > > > lock: c030f280, .magic: dead4ead, .owner: sh/954, .owner_cpu: 0
    > > > Pid: 954, comm: sh Not tainted 2.6.24-rc3-ge1cca7e8-dirty #3
    > > > [<c0103a04>] show_trace_log_lvl+0x35/0x54
    > > > [<c010450a>] show_trace+0x2c/0x2e
    > > > [<c0104e6d>] dump_stack+0x84/0x8a
    > > > [<c01ded7c>] spin_bug+0xa7/0xae
    > > > [<c01def14>] _raw_spin_lock+0x45/0xfa
    > > > [<c02a02b1>] _spin_lock_irqsave+0x68/0x7a
    > > > [<c01087e2>] pit_read+0xf/0x91
    > > > [<c0130ee1>] get_monotonic_cycles+0xf/0x2d
    > > > [<c013c0e7>] now+0x2a/0x7c
    > > > [<c013c333>] ____trace+0x4d/0x1e8
    > > > [<c013dbeb>] __mcount+0x95/0xa6
    > > > [<c010d354>] mcount+0x14/0x18
    > > > [<c0135a3c>] lock_acquired+0xe/0x1d7
    > > > [<c02a02b9>] _spin_lock_irqsave+0x70/0x7a
    > > > [<c01087e2>] pit_read+0xf/0x91
    > >
    > > hm, it seems lock_acquired() [in kernel/lockdep.c] needs to be marked
    > > 'notrace' too - otherwise we recurse back into pit_read().
    >
    > This time not even the offsets have changed. Dump is identical.

    hm, do you have CONFIG_FRAME_POINTERS=y, i.e. are the dumps reliable?

    Ingo
    --
    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/

    \
     
     \ /
      Last update: 2007-12-02 15:01    [W:3.094 / U:0.016 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site