From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Sebastien Dugue <sebastien.dugue@bull.net>
Cc: dwalker@mvista.com, tinytim@us.ibm.com,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org,
rostedt@goodmis.org, jean-pierre.dion@bull.net,
linuxppc-dev@ozlabs.org, paulus@samba.org,
gilles.carry@ext.bull.net, tglx@linutronix.de
Subject: Re: [PATCH 2/2] powerpc - Make the irq reverse mapping radix tree lockless
Date: Wed, 20 Aug 2008 15:23:01 +1000 [thread overview]
Message-ID: <1219209781.21386.25.camel@pasglop> (raw)
In-Reply-To: <1218029429-21114-3-git-send-email-sebastien.dugue@bull.net>
BTW. It would be good to try to turn the GFP_ATOMIC into GFP_KERNEL,
maybe using a semaphore instead of a lock to protect insertion vs.
initialisation. The old scheme was fine because if the atomic allocation
failed, it could fallback to the linear search and try again on the next
interrupt. Not anymore.
Ben.
next prev parent reply other threads:[~2008-08-20 5:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-06 13:30 [PATCH 0/2 V3] powerpc - Make the irq reverse mapping tree lockless Sebastien Dugue
2008-08-06 13:30 ` [PATCH 1/2] powerpc - Separate the irq radix tree insertion and lookup Sebastien Dugue
2008-08-20 5:21 ` Benjamin Herrenschmidt
2008-09-03 13:34 ` Sebastien Dugue
2008-08-06 13:30 ` [PATCH 2/2] powerpc - Make the irq reverse mapping radix tree lockless Sebastien Dugue
2008-08-20 5:22 ` Benjamin Herrenschmidt
2008-09-03 13:34 ` Sebastien Dugue
2008-08-20 5:23 ` Benjamin Herrenschmidt [this message]
2008-09-03 13:41 ` Sebastien Dugue
2008-09-04 2:52 ` Benjamin Herrenschmidt
2008-09-04 7:22 ` Sebastien Dugue
2008-09-04 7:34 ` Benjamin Herrenschmidt
2008-09-04 7:55 ` Sebastien Dugue
2008-09-04 7:58 ` Benjamin Herrenschmidt
2008-09-04 8:04 ` Sebastien Dugue
-- strict thread matches above, loose matches on Subject: below --
2008-09-04 12:37 [PATCH 0/2 V4] powerpc - Make the irq reverse mapping " Sebastien Dugue
2008-09-04 12:37 ` [PATCH 2/2] powerpc - Make the irq reverse mapping radix " Sebastien Dugue
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