linux-kernel - Re: [PATCH 3/11] powerpc: convert to generic helpers for IPI function calls

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Message-ID: <18445.56653.957832.720681@cargo.ozlabs.ibm.com>
Date:	Tue, 22 Apr 2008 22:42:53 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	npiggin@...e.de, torvalds@...ux-foundation.org, anton@...ba.org
Subject: Re: [PATCH 3/11] powerpc: convert to generic helpers for IPI function calls

Jens Axboe writes:

> I touched on both of these points in the initial mail, but perhaps you
> missed it as I didn't CC everyone for the 0/11 part. I'll add the full
> explanation to the 1/11 patch as well.

OK, that would be fine.  I didn't read right to the end of the 0/11
mail in detail, I admit. :)

Now that I have, I don't see anything about smp_send_stop trying to
get the interrupt sent off in a panic situation when some other cpu
might be stuck holding the lock (unless that's the "ipi_lock is a
little muddy" part, but that only talks about cpu onlining).  That bit
looks to be powerpc-specific, added in commit e057d985 in December
2007, so perhaps a mention that that has gone away now in the
description for 3/11 would be good.

Regards,
Paul.
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