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From: Randolph Chung <tausq@debian.org>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: carlos@baldric.uwo.ca, parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] Re: Trap handler
Date: Sun, 8 Dec 2002 22:19:13 -0800	[thread overview]
Message-ID: <20021209061913.GM21187@tausq.org> (raw)
In-Reply-To: <20021209051214.GK21187@tausq.org>

> > Here it is.
> 
> well, something is just very broken, even this simple code triggers the
> bug:

and with Grant's help, it's fixed in 2.4.20-pa12 :)

question for willy/jsm, etc though:
the fix has to do with where we should return to after handling an
interruption. in pre-2.4.20 code we used to return to intr_return. Grant
thinks that is incorrect and changed it to intr_restore (basically just
doing the rfi). the -pa12 patch changes it back so it will handle
pending signals. The items that remain not handled are restoring I-bit,
softirqs (and irqstats) and rescheduling. We are not sure if those bits
are needed for interruptions....  can you guys shed some light on this?

thanks,
randolph

  reply	other threads:[~2002-12-09  6:15 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20021208232601.GH21187@tausq.org>
2002-12-08 23:55 ` [parisc-linux] Re: Trap handler John David Anglin
2002-12-09  5:12   ` Randolph Chung
2002-12-09  6:19     ` Randolph Chung [this message]
2002-12-09 12:54       ` Matthew Wilcox
2002-12-09 18:03         ` Grant Grundler
2002-12-09 18:20           ` Matthew Wilcox
2002-12-09 18:41             ` Grant Grundler
2002-12-09 18:55               ` Matthew Wilcox
2002-12-09 16:18       ` John David Anglin
2002-12-09 16:31         ` John David Anglin

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