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    SubjectRe: 2.6.39-rc4+: Kernel leaking memory during FS scanning, regression?
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    On Thu, 2011-04-28 at 17:28 +0200, Sedat Dilek wrote:

    > OK, I tried with the patch proposed by Thomas (0003):

    (thanks)

    > patches/0001-Revert-rcu-restrict-TREE_RCU-to-SMP-builds-with-PREE.patch
    > patches/0002-sched-Add-warning-when-RT-throttling-is-activated.patch
    > patches/0003-sched-Remove-skip_clock_update-check.patch
    >
    > >From the very beginning it looked as the system is "stable" due to:
    >
    > .rt_nr_running : 0
    > .rt_throttled : 0
    >
    > This changed when I started a simple tar-job to save my kernel
    > build-dir to an external USB-hdd.
    > From...
    >
    > .rt_nr_running : 1
    > .rt_throttled : 1
    >
    > ...To:
    >
    > .rt_nr_running : 2
    > .rt_throttled : 1
    >
    > Unfortunately, reducing all activities to a minimum load, did not
    > change from last known RT throttling state.
    >
    > Just noticed rt_time exceeds the value of 950 first time here:

    That would happen even if we did forced eviction.

    > ----------------------------------------------------------------------------------------------------------
    > R cat 2652 115108.993460 1 120
    > 115108.993460 1.147986 0.000000 /
    > --
    > rt_rq[0]:
    > .rt_nr_running : 1
    > .rt_throttled : 1
    > .rt_time : 950.005460
    > .rt_runtime : 950.000000
    > ----------------------------------------------------------------------------------------------------------
    > rcuc0 7 0.000000 56869 98
    > 0.000000 981.385605 0.000000 /
    > --
    > rt_rq[0]:
    > .rt_nr_running : 2
    > .rt_throttled : 1
    > .rt_time : 950.005460
    > .rt_runtime : 950.000000

    Still getting stuck. Eliminates the clock update optimization, but that
    seemed unlikely anyway. (I'll build a UP kernel and poke it)

    -Mike



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