From: Nathan Lynch <ntl@pobox.com>
To: Paul Mackerras <paulus@samba.org>
Cc: External List <linuxppc-dev@ozlabs.org>, Milton Miller <miltonm@bga.com>
Subject: Re: [PATCH] Add rtas_set_indicator_fast() for RTAS call without extended delay
Date: Sun, 30 Jul 2006 23:38:06 -0500 [thread overview]
Message-ID: <20060731043806.GA9774@localdomain> (raw)
In-Reply-To: <17613.33093.767856.432771@cargo.ozlabs.ibm.com>
Paul Mackerras wrote:
> Haren Myneni writes:
>
> > + WARN_ON(rc == -2 || (rc >= 9900 && rc <= 9905));
>
> This worries me... do we know for sure that RTAS will never return a
> busy code? If it could possibly return a busy code, and we can't
> sleep, then we should spin doing the call again and again until it
> works, I think.
The PAPR marks certain RTAS calls as "fast", meaning they must not
return any kind of busy status. Manipulating the GIQ (set-indicator
with token 9005) is defined as "fast".
prev parent reply other threads:[~2006-07-31 4:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-26 4:52 [PATCH] Add rtas_set_indicator_fast() for RTAS call without extended delay Haren Myneni
2006-07-26 22:04 ` Nathan Lynch
2006-07-27 21:29 ` Haren Myneni
2006-07-31 4:04 ` Paul Mackerras
2006-07-31 4:38 ` Nathan Lynch [this message]
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