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    SubjectRe: unwanted disk access by the kernel?
    Dan Maas wrote:
    >
    > I've been trying to set up my laptop for mobile use. I'm having a
    > problem with unwanted disk activity - even when the system is
    > completely idle, there is still an occasional trickle of disk writes
    > (which prevents the poor hard drive from ever spinning down).
    >
    > Yes, I thought this was a user-space issue too - but even booting into
    > a bare-bones root environment does not stop the occasional disk
    > access! Here is everything that's left:

    Are all filesystems mounted with the `noatime' mount option?

    > PID USER VSZ RSS TIME STAT COMMAND WCHAN
    > 7 root 0 0 00:00:00 SW [kupdated] kupdate
    > 6 root 0 0 00:00:00 SW [bdflush] bdflush
    > 5 root 0 0 00:00:00 SW [kswapd] kswapd
    > 4 root 0 0 00:00:00 SWN [ksoftirqd_CPU0] ksoftirqd
    > 1 root 1316 524 00:00:05 S init [S] select
    > 2 root 0 0 00:00:00 SW [keventd] context_thread
    > 3 root 0 0 00:00:00 SW [kapmd] apm_mainloop
    > 8 root 0 0 00:00:00 Z [khubd <defunct> exit

    eww. Does khubd always do that? Does this patch make it behave?




    --- linux-2.4.19-pre3/drivers/usb/hub.c Mon Mar 11 14:53:21 2002
    +++ linux-akpm/drivers/usb/hub.c Thu Mar 14 22:59:17 2002
    @@ -908,6 +908,7 @@ static int usb_hub_thread(void *__hub)
    */

    daemonize();
    + reparent_to_init();

    /* Setup a nice name */
    strcpy(current->comm, "khubd");
    -
    -
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