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    SubjectRe: 2.6.21 known regressions (v2) (for -stable team)
    Michal Piotrowski schrieb:
    > Subject : Bad interaction between dynticks and amarok?
    > References : http://lkml.org/lkml/2007/4/26/307
    > Submitter : Thomas Meyer <thomas.mey@web.de>
    > Status : Unknow
    >
    >
    Please remove this from the regression list. This seems to be an
    userspace only problem and is not related to any kernel driver:
    amarok and/or audacious seems to repeatedly read/write to the X socket:

    tail of the strace of audacious:
    gettimeofday({1177782978, 24491}, NULL) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 581502867}) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 581614815}) = 0
    select(4, [3], [3], NULL, NULL) = 1 (out [3])
    writev(3,
    [{"\221\3\n\0\3\0\200\2#\0\200\2\0\6@\0\240\4\20\0L\0\20\0"..., 40}], 1)
    = 40
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 25286}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 33242}, NULL) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 33475}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 1) = 0
    gettimeofday({1177782978, 36548}, NULL) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 593554129}) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 36921}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 46572}, NULL) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 603578038}) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 603689148}) = 0
    select(4, [3], [3], NULL, NULL) = 1 (out [3])
    writev(3, [{"\221\3\n\0\3\0\200\2#\0\200\2\0\6@\0\0\4 \0L\0\20\0\23"...,
    40}], 1) = 40
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 47341}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 56566}, NULL) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 56799}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 0) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 613921380}) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 57282}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 67696}, NULL) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 624704202}) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 624817966}) = 0
    select(4, [3], [3], NULL, NULL) = 1 (out [3])
    writev(3, [{"\221\3\n\0\3\0\200\2#\0\200\2\0\6@\0P\4
    \0L\0\20\0\23\0"..., 40}], 1) = 40
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 68476}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 76564}, NULL) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 76796}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 0) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 633919963}) = 0
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 77280}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN}], 2, 9) = 0
    gettimeofday({1177782978, 86898}, NULL) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 643911329}) = 0
    clock_gettime(CLOCK_MONOTONIC, {224, 644025581}) = 0
    select(4, [3], [3], NULL, NULL) = 1 (out [3])
    writev(3, [{"\221\3\n\0\3\0\200\2#\0\200\2\0\6@\0\240\4
    \0L\0\20\0\23"..., 40}], 1) = 40
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 87702}, NULL) = 0
    poll([{fd=4, events=POLLIN}, {fd=3, events=POLLIN, revents=POLLIN}], 2,
    9) = 1
    read(3, "\n\3P\v\4\0\200\2\0\0\0\0\210v\274\277r\300\10\10x\35!"...,
    4096) = 96
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    read(3, 0x80da6c8, 4096) = -1 EAGAIN (Resource
    temporarily unavailable)
    gettimeofday({1177782978, 90108}, NULL) = 0
    gettimeofday({1177782978, 90163}, NULL) = 0

    But i didn't have a look at what is going on here. But running amarok
    and/or audacious (without playing a song!) adds 50-70 more interrupts to
    the timer interrupt.

    with kind regards
    thomas

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