lkml.org 
[lkml]   [2001]   [Jun]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Strange behaviour of swap under 2.4.5-ac15


    On Mon, 18 Jun 2001, German Gomez Garcia wrote:

    > On Mon, 18 Jun 2001, Andrea Arcangeli wrote:
    >
    > > On Mon, Jun 18, 2001 at 12:14:01PM +0200, German Gomez Garcia wrote:
    > > > Hello,
    > > >
    > > > I've running 2.4.5-ac15 for almost a day (22 hours) and I found
    > > > some strange behaviour of the kswap, at least it was not present in
    > > > 2.4.5-ac9. The swap memory increase with time as the cache dedicated
    > > > memory also increase, that is swapping process at a very fast rate, even
    > > > when no program is getting more memory. Is that the expected behaviour?
    > > > An example, with no process running (just the usual daemons and
    > > > none of them getting extra memory) the command:
    > > >
    > > > free ; sleep 60; free
    > > >
    > > > total used free shared buffers cached
    > > > Mem: 513416 393184 120232 364 63276 254576
    > > > -/+ buffers/cache: 75332 438084
    > > > Swap: 530104 14228 515876
    > > >
    > > > total used free shared buffers cached
    > > > Mem: 513416 393192 120224 364 63276 258412
    > > > -/+ buffers/cache: 71504 441912
    > > > Swap: 530104 18064 512040
    > > >
    > > > Any idea?
    > >
    > > either apply this patch to 2.4.5ac15:
    > >
    > > ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.5aa3/00_fix-unusable-vm-on-alpha-1
    > >
    > > (note it is not an alpha specific bug, it's just that I was triggering
    > > all the time on alpha so I called the patch that way)
    >
    > It doesn't fix it, swapped memory and cache memory increase at a
    > rate of about 40K/s, swapping process very fast, even the "agetty"
    > processes get 64 out of 68 K swapped one or two minutes after booting.
    > This rate gets lower as nothing but the essential (4K of "agetty", etc) is
    > left in the physical memory.
    >
    I was having similar problems with a sun 3500 with 4 GB of RAM
    running 2.4.5 (no problems of this kind with 2.4.4), and this
    patch fixed my problems under eavy stress.

    I was having the most of memory free and a lot of swap allocated,
    and system swapping to dead.

    Now it works, with other problems, but when i have time and
    permission to try to debug them..... :).

    Maybe there could be some HW related reason because of which it fixed for
    my sun and not for you...

    Luigi


    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 12:55    [W:0.023 / U:31.588 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site