From: Erich Focht <focht@ess.nec.de>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] Help with Ingo scheduler on IA64
Date: Mon, 21 Jan 2002 18:24:08 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590698805899@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590698805816@msgid-missing>
Please ignore my previous email. The interrupt can of course come from
within the context_switch() part in schedule(), where psr.i is set.
Unfortunately the context switch in Ingo's scheduler happens with the
runqueue lock held, which can lead to a deadlock eg. if the timer
interrupt is called inside and sched_tick spinlocks on the runqueue lock
held by schedule(). On IA64 (HZ\x1024) this probably happens much more
frequently than on IA32 (HZ\x100).
Regards,
Erich
On Sat, 19 Jan 2002, David Mosberger wrote:
> psr.i *does* disable all interrupts, including NMI. Device interrupts
> are generally referred to as "external interrupts" in the ia64
> manuals. If you read the manual, you'll find there is no ambiguity
> about this at all. For example, see Table 5-8: External Interrupt
> Control Registers; it lists ITV...
>
> --david
next prev parent reply other threads:[~2002-01-21 18:24 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-12 2:23 [Linux-ia64] Help with Ingo scheduler on IA64 Nick Pollitt
2002-01-12 3:13 ` David Mosberger
2002-01-14 18:23 ` Erich Focht
2002-01-15 1:07 ` Nick Pollitt
2002-01-15 9:28 ` Erich Focht
2002-01-15 17:53 ` Erich Focht
2002-01-15 17:58 ` Erich Focht
2002-01-15 18:59 ` Erich Focht
2002-01-15 19:52 ` Ingo Molnar
2002-01-15 19:57 ` Ingo Molnar
2002-01-15 20:12 ` Ingo Molnar
2002-01-16 5:30 ` Nick Pollitt
2002-01-16 21:04 ` Erich Focht
2002-01-17 1:42 ` David Mosberger
2002-01-17 5:39 ` Nick Pollitt
2002-01-17 8:06 ` David Mosberger
2002-01-17 9:43 ` Ingo Molnar
2002-01-17 9:45 ` Ingo Molnar
2002-01-17 18:25 ` Erich Focht
2002-01-17 21:17 ` Ingo Molnar
2002-01-19 17:17 ` Erich Focht
2002-01-19 20:10 ` David Mosberger
2002-01-21 16:23 ` Erich Focht
2002-01-21 18:24 ` Erich Focht [this message]
2002-01-21 18:45 ` Erich Focht
2002-01-21 20:10 ` David Mosberger
2002-01-21 20:23 ` David Mosberger
2002-01-21 20:32 ` Ingo Molnar
2002-01-21 20:41 ` David Mosberger
2002-01-21 21:11 ` Ingo Molnar
2002-01-21 22:11 ` Ingo Molnar
2002-01-21 22:27 ` Ingo Molnar
2002-01-21 22:30 ` Ingo Molnar
2002-01-21 22:41 ` Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=marc-linux-ia64-105590698805899@msgid-missing \
--to=focht@ess.nec.de \
--cc=linux-ia64@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox