From: mulyadi.santosa@gmail.com (Mulyadi Santosa)
To: kernelnewbies@lists.kernelnewbies.org
Subject: question regarding down_interruptible
Date: Tue, 5 Apr 2011 13:24:40 +0700 [thread overview]
Message-ID: <BANLkTim0AVejMp=vx4JVfQtY2h5FWrA=Ng@mail.gmail.com> (raw)
In-Reply-To: <BANLkTi=tRUQNugQ4_iacrMWWvD3g_CPDEw@mail.gmail.com>
On Tue, Apr 5, 2011 at 10:37, Vijay Ram Chitrapu
<chitrapu.vijayram@gmail.com> wrote:
> Thanks Dave for that reply.
> While i try out registering handlers for all possible signals, I
> forgot to mention this point in my previous email.
>
> The userspace is waiting on a select call. As per the system design,
> the kernel module interrupts when there is a data intended to the user
> (via poll in kernel). If this could be the cause for the userspace
> getting a signal, then typically what signal is generated to the
> process to invoke select to inform that the I/O is ready. Is it SIGIO?
it's select() right? no async I/O? well,then AFAIK it;s not
signal...the blocking process is scheduled back to run queue and
scheduler kicks in...
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
prev parent reply other threads:[~2011-04-05 6:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-04 4:27 question regarding down_interruptible Vijay Ram Chitrapu
2011-04-04 15:48 ` Dave Hylands
2011-04-05 3:37 ` Vijay Ram Chitrapu
2011-04-05 6:24 ` Mulyadi Santosa [this message]
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