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    SubjectRe: ksoftirqd using mysteriously high amounts of CPU time
    Andrew Morton wrote:
    > Brad Laue <brad@brad-x.com> wrote:
    >
    >> Brad Laue wrote:
    >> > Hopefully the attached shows some irregularity. If not, I'll have to
    >> > reply back in a few weeks when the problem recurs over the course of time.
    >>
    >> And without further ado, the attachment. It's been a long day. :)
    >
    >
    > It beats me. Something must be waking up ksoftirqd all the time.
    >
    > If you have time, could you please apply the below, then wait for ksoftirqd
    > to go bad again and then run:
    >
    >
    > dmesg -c
    > echo 1 > /proc/sys/debug/0 ; sleep 1; echo 0 > /proc/sys/debug/0
    > dmesg -s 1000000 > /tmp/foo
    >
    > and then send foo?
    >

    Okay, it looks like the 'pppoe' process is definitely causing all the
    soft interrupts. Puzzling, because on other systems with similar
    hardware this doesn't happen. Ran the machine without iptables running
    (eek!!!) just to make sure, and the same result occurred, so it doesn't
    seem to be the fact that packets are going through an elaborate ruleset
    that's causing it. Kernel mode PPPoE doesn't seem to change things much.

    Hard to figure out from a kernel perspective why this many soft
    interrupts are being used, but I'm just getting a grasp on what their
    purpose is to begin with.

    Hope this offers some insight.

    Brad
    ction+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c02978b3>] net_tx_action+0x83/0xd0
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c02978b3>] net_tx_action+0x83/0xd0
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb

    pppoe wakes ksoftirqd
    Call Trace:
    [<c0121e6c>] __tasklet_schedule+0x7c/0x80
    [<d084656c>] ppp_asynctty_receive+0xbc/0xd0 [ppp_async]
    [<c024a342>] pty_write+0x142/0x1d0
    [<c0249333>] write_chan+0x1f3/0x220
    [<c011a910>] default_wake_function+0x0/0x20
    [<c011a910>] default_wake_function+0x0/0x20
    [<c0243d38>] tty_write+0x1e8/0x290
    [<c0249140>] write_chan+0x0/0x220
    [<c0243b50>] tty_write+0x0/0x290
    [<c0151fa8>] vfs_write+0xb8/0x130
    [<c01520d2>] sys_write+0x42/0x70
    [<c0109387>] syscall_call+0x7/0xb


    c013df00 kmem_cache_alloc 2 0.0312
    c013df90 __kmalloc 2 0.0156
    c01d8900 xfs_ilock 2 0.0114
    c0204390 linvfs_write 2 0.0069
    c02475f0 n_tty_write_wakeup 2 0.0312
    c0247630 n_tty_receive_buf 2 0.0005
    c024a200 pty_write 2 0.0043
    c0121cc0 local_bh_enable 3 0.0208
    c016d180 dnotify_parent 3 0.0156
    c0215eb0 fast_clear_page 3 0.0312
    c0109354 system_call 4 0.0909
    c0138300 generic_file_aio_write_nolock 4 0.0015
    c0151e30 do_sync_write 4 0.0208
    c0151ef0 vfs_write 4 0.0132
    c0155e10 generic_commit_write 4 0.0227
    c0164ce0 sys_select 4 0.0032
    c016bde0 inode_update_time 4 0.0192
    c0243a00 tty_read 4 0.0119
    c0243b50 tty_write 4 0.0061
    c0126040 run_timer_softirq 5 0.0116
    c013a580 free_hot_cold_page 5 0.0195
    c0164900 max_select_fd 5 0.0223
    c0215974 csum_partial 5 0.0174
    c02488e0 read_chan 5 0.0023
    c0152ee0 fget 6 0.0938
    c01551f0 __block_prepare_write 6 0.0059
    c01649e0 do_select 6 0.0083
    c0213930 radix_tree_lookup 6 0.0750
    c011a990 __wake_up 8 0.0833
    c013e060 kfree 9 0.0804
    c01b0ed0 xfs_bmapi 9 0.0018
    c01862a0 write_profile 10 0.1562
    c0208de0 xfs_write 10 0.0047
    c0216440 __copy_from_user_ll 17 0.1328
    c011a340 schedule 18 0.0128
    c010ad50 handle_IRQ_event 21 0.1875
    c02163d0 __copy_to_user_ll 27 0.2411
    c0121c00 do_softirq 144 0.7500
    c0107030 default_idle 8696 181.1667
    00000000 total 9144 0.0060

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      Last update: 2005-03-22 14:01    [W:0.056 / U:1.476 seconds]
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