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    SubjectRe: BUG in check_monotonic_clock()
    Daniel Walker wrote:
    >
    > This is off a dual P3 during boot with 2.6.15-rt6. I'll send the .config
    > privately . I had a fair amount of debugging on.

    Has the attached patch been applied? Fixed this for me....

    George
    --
    >
    >
    > check_monotonic_clock: monotonic inconsistency detected!
    > from 1a27e7384 (7021163396) to 19f92d748 (6972168008).
    > udev/238[CPU#1]: BUG in check_monotonic_clock at kernel/time/timeofday.c:160
    > [<c0105b03>] dump_stack+0x23/0x30 (20)
    > [<c0129e43>] __WARN_ON+0x63/0x80 (40)
    > [<c0148584>] check_monotonic_clock+0xd4/0xe0 (52)
    > [<c01489b8>] get_monotonic_clock+0xc8/0x100 (56)
    > [<c014475d>] __hrtimer_start+0xdd/0x100 (40)
    > [<c0400046>] schedule_hrtimer+0x46/0xd0 (48)
    > [<c0144f0f>] hrtimer_nanosleep+0x5f/0x130 (104)
    > [<c0145053>] sys_nanosleep+0x73/0x80 (36)
    > [<c0104b2a>] syscall_call+0x7/0xb (-4020)
    > ---------------------------
    > | preempt count: 00000002 ]
    > | 2-level deep critical section nesting:
    > ----------------------------------------
    > .. [<c014cf1c>] .... add_preempt_count+0x1c/0x20
    > .....[<c0143e2a>] .. ( <= lock_hrtimer_base+0x2a/0x60)
    > .. [<c014cf1c>] .... add_preempt_count+0x1c/0x20
    > .....[<c0129df6>] .. ( <= __WARN_ON+0x16/0x80)
    >
    >
    > -
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    --
    George Anzinger george@wildturkeyranch.net
    HRT (High-res-timers): http://sourceforge.net/projects/high-res-timers/
    kernel/time.c | 13 ++++++++-----
    1 files changed, 8 insertions(+), 5 deletions(-)

    Index: linux-2.6.16-rc/kernel/time.c
    ===================================================================
    --- linux-2.6.16-rc.orig/kernel/time.c
    +++ linux-2.6.16-rc/kernel/time.c
    @@ -702,16 +702,19 @@ void set_normalized_timespec(struct time
    *
    * Returns the timespec representation of the nsec parameter.
    */
    -inline struct timespec ns_to_timespec(const nsec_t nsec)
    +struct timespec ns_to_timespec(const nsec_t nsec)
    {
    struct timespec ts;

    - if (nsec)
    + if (!nsec) return (struct timespec){0, 0};
    +
    + if (nsec < 0) {
    + ts.tv_sec = div_long_long_rem_signed(-nsec, NSEC_PER_SEC,
    + &ts.tv_nsec);
    + set_normalized_timespec(&ts, -ts.tv_sec, -ts.tv_nsec);
    + } else
    ts.tv_sec = div_long_long_rem_signed(nsec, NSEC_PER_SEC,
    &ts.tv_nsec);
    - else
    - ts.tv_sec = ts.tv_nsec = 0;
    -
    return ts;
    }
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