From: Jun Sun <jsun@mvista.com>
To: "Sirotkin, Alexander" <demiurg@ti.com>
Cc: linux-mips@linux-mips.org, jsun@mvista.com
Subject: Re: tasklet latency and system calls on mips
Date: Mon, 18 Aug 2003 10:08:31 -0700 [thread overview]
Message-ID: <20030818100831.A16027@mvista.com> (raw)
In-Reply-To: <3F40F0F0.1080106@ti.com>; from demiurg@ti.com on Mon, Aug 18, 2003 at 06:29:52PM +0300
On Mon, Aug 18, 2003 at 06:29:52PM +0300, Sirotkin, Alexander wrote:
>
>
>
> The tasklet should be executed at the return of interrupt handling.
>
> If not, there is a bug.
>
>
>
> I have a feeling that we are going in circles. Tasklets are executed at
> the return of interrupt handler.
> However, I suspect that this is not enough.
If you follow this, plus "tasklet_schedule() is indeed called in an interrupt
handler", you will should see "executing tasklet at the return of interrupt
handler" is _obviously_ enough.
> On mips (contrary to x86),
> system call is NOT an interrupt.
> It's a different exception with different handler. Therefore I suspect
> that tasklets are NOT called at
> the end of system call exception handler (which is a different handler,
> not do_IRQ).
>
... which is fine, if you can follow the above logic.
Jun
prev parent reply other threads:[~2003-08-18 17:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-13 13:46 tasklet latency and system calls on mips Sirotkin, Alexander
2003-08-13 16:54 ` Jun Sun
2003-08-14 9:17 ` Sirotkin, Alexander
2003-08-14 16:45 ` Jun Sun
2003-08-18 15:29 ` Sirotkin, Alexander
2003-08-18 17:08 ` Jun Sun [this message]
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