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    SubjectRe: Finding what is stuck...
    On Mon, 1 Sep 2008 17:08:12 -0700, Arjan van de Ven <> wrote:

    > On Tue, 2 Sep 2008 02:04:47 +0200
    > "J.A. Magallón" <> wrote:
    > > Hi all...
    > >
    > > I'm running 2.6.27-rc5-git2 on an Aspire One.
    > > The system is in general pretty responsive, but sometimes it just gets
    > > totally stuck. Even the mouse stops.
    > >
    > > It looks related to disk (SSD) access, but I'm not totally sure.
    > > Is there any way to find what is getting stuck ? I know that SSDs can
    > > be slow on write, I don't mind if the system is faster or slower
    > > (it's small :))), but if the speed is constant. That occasional
    > > pauses are strange, like if SSD flushing gets stuck on BKL
    > > (I know, no idea about what I talk...).
    > >
    > > I'm using ext3 fs, noop iosched. But as I say, I'm not sure that the
    > > disk writes are the culprit.
    > >
    > > Any idea about how to find this ?
    > Have you tried to run "latencytop"?
    > (you need to enable this in the kernel config as well)
    > it tends to (for me at least) point out very well where stalls happen,
    > or at least, what the system is doing when they happen.
    > (hint: make sure you do "make install" before running it)

    Thanks, I'm a bit limited to distro kernels 'cause I don't want to build
    my own kernel on the One, but I have just looked and Mandriva kernel is
    built with LATENCYTOP=y. I will try that and report...

    J.A. Magallon \ Software is like sex:
    \ It's better when it's free
    Mandriva Linux release 2008.1 (Cooker) for i586
    Linux kernel 2.6.23-jam01, gcc version 4.2.2 20070909
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