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    SubjectRe: [PATCH *] rmap VM 11c
    This looks a little like my problem...

    See http://karlsbakk.net/dev/kernel/vm-fsckup.txt

    On Thu, 17 Jan 2002, Adam Kropelin wrote:

    > Rik van Riel <riel@conectiva.com.br>:
    > > For this release, IO tests are very much welcome ...
    >
    > Results from a run of my large FTP transfer test on this new release are...
    > interesting.
    >
    > Overall time shows an improvement (6:28), though not enough of one to take the
    > lead over 2.4.13-ac7.
    >
    > More interesting, perhaps, is the vmstat output, which shows this at first:
    >
    > procs memory swap io system cpu
    > r b w swpd free buff cache si so bi bo in cs us sy id
    > 0 0 0 0 47816 2992 84236 0 0 10 0 4462 174 1 33 66
    > 1 0 0 0 41704 3004 89320 0 0 10 0 4322 167 0 33 67
    > 0 1 0 0 36004 3012 94064 0 0 9 877 4030 163 1 30 69
    > 0 1 1 0 33536 3016 96112 0 0 4 1616 1724 62 0 18 82
    > 0 1 2 0 31068 3020 98160 0 0 4 2048 1729 52 1 15 83
    > 0 1 1 0 28608 3024 100208 0 0 4 2064 1735 56 1 16 82
    > 0 1 1 0 26144 3028 102256 0 0 4 2048 1735 50 0 16 84
    > 0 1 1 0 23684 3032 104304 0 0 5 2048 1713 45 1 15 84
    > 0 1 1 0 21216 3036 106352 0 0 3 2064 1723 52 1 14 85
    > 1 0 2 0 18728 3040 108420 0 0 5 2048 1750 59 0 17 82
    > 0 1 1 0 16292 3044 110448 0 0 3 2064 1722 60 0 15 84
    > 1 0 1 0 13824 3048 112572 0 0 5 2032 1800 61 0 17 83
    > 1 0 1 0 11696 3052 114548 0 0 4 2528 1658 47 0 14 86
    > 1 0 1 0 9232 3056 116596 0 0 4 2048 1735 51 1 13 86
    > 0 1 2 0 6808 3060 118640 0 0 3 1584 1729 84 0 16 84
    >
    > (i.e., nice steady writeout reminiscent of -ac)
    >
    > ...but after about 20 seconds, behavior degrades again:
    >
    > procs memory swap io system cpu
    > r b w swpd free buff cache si so bi bo in cs us sy id
    > 0 1 1 0 1500 3124 123268 0 0 0 3788 534 20 0 8 92
    > 0 1 1 0 1500 3124 123268 0 0 0 0 107 12 0 0 100
    > 0 1 1 0 1500 3124 123268 0 0 0 0 123 10 0 0 100
    > 0 1 1 0 1500 3124 123268 0 0 0 3666 123 12 0 2 97
    > 0 1 1 0 1500 3124 123268 0 0 1 259 109 12 0 8 92
    > 1 0 0 0 1404 3124 123360 0 0 2 0 1078 28 0 7 92
    > 1 0 0 0 1404 3136 123444 0 0 11 0 4560 178 0 39 61
    > 1 0 0 0 1404 3148 123448 0 0 10 0 4620 175 1 34 64
    > 0 0 0 0 1312 3156 123568 0 0 11 0 4276 181 0 36 64
    > 0 0 0 0 1404 3168 123492 0 0 10 0 4330 185 1 30 68
    > 0 1 1 0 1404 3172 123488 0 0 4 6864 1742 69 0 17 83
    > 0 1 1 0 1408 3172 123488 0 0 0 0 111 12 0 0 99
    > 0 1 1 0 1408 3172 123488 0 0 0 0 126 8 0 0 100
    > 0 1 1 0 1404 3172 123480 0 0 0 7456 518 18 0 10 90
    > 0 1 1 0 1404 3172 123480 0 0 0 0 112 10 0 0 100
    > 0 1 1 0 1404 3172 123480 0 0 0 0 123 9 0 0 100
    > 0 1 1 0 1404 3172 123476 0 0 1 7222 120 16 0 5 95
    > 0 1 1 0 1404 3172 123476 0 0 0 0 106 8 0 0 100
    > 0 1 1 0 1524 3172 123352 0 0 0 3790 519 18 0 8 92
    > 0 1 1 0 1524 3172 123352 0 0 0 0 113 8 0 0 100
    > 0 1 1 0 1524 3172 123352 0 0 0 0 125 8 0 0 100
    >
    > Previous tests showed fluctuating bo values from the start; this is the first
    > time I've seen them steady, so something in the patch definitely is showing
    > through here.
    >
    > I've a couple more tests to run, such as combining -rmap11c with cpqarray and
    > eepro driver updates from -ac. I'll keep you posted.
    >
    > --Adam
    >
    >
    > -
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    --
    Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA

    Computers are like air conditioners.
    They stop working when you open Windows.

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