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    SubjectRe: linux-next: Tree for September 4
    On Fri, 5 Sep 2008 12:56:35 +0200 "Rafael J. Wysocki" <rjw@sisk.pl> wrote:

    > On Friday, 5 of September 2008, Andrew Morton wrote:
    > > On Thu, 4 Sep 2008 19:36:06 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
    > >
    > > > I have created today's linux-next tree at
    > > > git://git.kernel.org/pub/scm/linux/kernel/git/sfr/linux-next.git
    > >
    > > The infamous Vaio hasn't finished catching up with you guys yet.
    > > Something in linux-next broke suspend-to-RAM.
    > >
    > > An `echo mem > /sys/power/state' causes "Freezing of tasks failed after
    > > 20.00 seconds (1 tasks refusing to freeze):"
    > >
    > > dmesg: http://userweb.kernel.org/~akpm/dmesg-sony-suspend.txt
    > > config: http://userweb.kernel.org/~akpm/config-sony.txt
    > >
    > > This only happens after the X server has been started.
    > >
    > > Mainline is OK.
    >
    > According to your dmesg the process that refused to freeze was
    >
    > hald-addon-stor
    >
    > which got stuck in ... getnstimeofday (???) (can you check what
    > source code corresponds to getnstimeofday+0x37/0xbc pls?):
    >
    > hald-addon-st D 00000046 0 2322 2282
    > f4de5b74 00000046 f4de5b54 00000046 f4de5b5c c0135f56 f6b96e44 f4deaf40
    > f4deb0bc f5580948 f4de5bb0 f4de5b6c c013336e f6aa77c8 f6aa77c8 f6aa77a0
    > f4de5bb0 f4de5b7c c0331f09 f4de5bd0 c01f4205 00000000 00000000 00000000
    > Call Trace:
    > [<c0135f56>] ? getnstimeofday+0x37/0xbc
    > [<c013336e>] ? ktime_get_ts+0x40/0x44
    > [<c0331f09>] io_schedule+0x39/0x6c
    > [<c01f4205>] get_request_wait+0x80/0xcd
    > ...

    (gdb) x/60i getnstimeofday
    0xc0135d63 <getnstimeofday>: push %ebp
    0xc0135d64 <getnstimeofday+1>: mov %esp,%ebp
    0xc0135d66 <getnstimeofday+3>: push %edi
    0xc0135d67 <getnstimeofday+4>: push %esi
    0xc0135d68 <getnstimeofday+5>: push %ebx
    0xc0135d69 <getnstimeofday+6>: sub $0x8,%esp
    0xc0135d6c <getnstimeofday+9>: mov %eax,0xffffffec(%ebp)
    0xc0135d6f <getnstimeofday+12>: mov 0xc045a2c0,%eax
    0xc0135d74 <getnstimeofday+17>: mov %eax,0xfffffff0(%ebp)
    0xc0135d77 <getnstimeofday+20>: test $0x1,%al
    0xc0135d79 <getnstimeofday+22>: je 0xc0135d7f <getnstimeofday+28>
    0xc0135d7b <getnstimeofday+24>: pause
    0xc0135d7d <getnstimeofday+26>: jmp 0xc0135d6f <getnstimeofday+12>
    0xc0135d7f <getnstimeofday+28>: mov 0xffffffec(%ebp),%ecx
    0xc0135d82 <getnstimeofday+31>: mov 0xc05db920,%eax
    0xc0135d87 <getnstimeofday+36>: mov 0xc05db924,%edx
    0xc0135d8d <getnstimeofday+42>: mov %eax,(%ecx)
    0xc0135d8f <getnstimeofday+44>: mov %edx,0x4(%ecx)
    0xc0135d92 <getnstimeofday+47>: mov 0xc05db938,%eax
    0xc0135d97 <getnstimeofday+52>: call *0x10(%eax)
    0xc0135d9a <getnstimeofday+55>: mov 0xc05db938,%esi
    0xc0135da0 <getnstimeofday+61>: mov 0x1c(%esi),%ecx
    0xc0135da3 <getnstimeofday+64>: sub 0x48(%esi),%eax
    0xc0135da6 <getnstimeofday+67>: sbb 0x4c(%esi),%edx
    0xc0135da9 <getnstimeofday+70>: and 0x14(%esi),%eax
    0xc0135dac <getnstimeofday+73>: and 0x18(%esi),%edx
    0xc0135daf <getnstimeofday+76>: mov %edx,%edi
    0xc0135db1 <getnstimeofday+78>: imul %ecx,%edi
    0xc0135db4 <getnstimeofday+81>: mul %ecx
    0xc0135db6 <getnstimeofday+83>: mov 0x24(%esi),%ecx
    0xc0135db9 <getnstimeofday+86>: lea (%edi,%edx,1),%edx
    0xc0135dbc <getnstimeofday+89>: mov %eax,%ebx
    0xc0135dbe <getnstimeofday+91>: mov %edx,%esi
    0xc0135dc0 <getnstimeofday+93>: xor %edi,%edi
    0xc0135dc2 <getnstimeofday+95>: shrd %cl,%edx,%ebx
    0xc0135dc5 <getnstimeofday+98>: shr %cl,%esi
    0xc0135dc7 <getnstimeofday+100>: test $0x20,%cl
    0xc0135dca <getnstimeofday+103>: cmovne %esi,%ebx
    0xc0135dcd <getnstimeofday+106>: cmovne %edi,%esi
    0xc0135dd0 <getnstimeofday+109>: mov %ebx,%edx

    (gdb) l *0xc0135d9a
    0xc0135d9a is in getnstimeofday (kernel/time/timekeeping.c:104).
    99
    100 /* read clocksource: */
    101 cycle_now = clocksource_read(clock);
    102
    103 /* calculate the delta since the last update_wall_time: */
    104 cycle_delta = (cycle_now - clock->cycle_last) & clock->mask;
    105
    106 /* convert to nanoseconds: */
    107 nsecs = cyc2ns(clock, cycle_delta);
    108

    Which implies that someone mucked up xtime_lock.

    But I don't think any of that is correct. The getnstimeofday is just
    stack gunk. hald is in D state and is asleep in get_request_wait().


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