From: Ryan Arnold <rsa@us.ibm.com>
To: Michael Ellerman <michael@ellerman.id.au>
Cc: linuxppc-dev@ozlabs.org, cbe-oss-dev@ozlabs.org
Subject: question on why hvc_console calls hvc_poll() in hvc_handle_interrupt().
Date: Thu, 20 Apr 2006 15:25:52 -0500 [thread overview]
Message-ID: <1145564752.29313.185.camel@localhost.localdomain> (raw)
In-Reply-To: <1145563391.29313.174.camel@localhost.localdomain>
While on the topic of hvc_console; I think I saw a patch go through a
while ago that added hvc_poll() to hvc_handle_interrupt(). I can't say
I'm too pleased with that addition. I did my best to keep locking
outside of the interrupt handler.
I wonder if that change was tested on a power5 lpar system with several
secondary VSerial Server adapters (hvc1-hvcn) being hammered with data.
I'm pretty paranoid about deadlock, hence the reason for keeping locking
out of the int. handler.
--
Ryan S. Arnold <rsa@us.ibm.com>
IBM Linux Technology Center
Linux on Power Toolchain
next prev parent reply other threads:[~2006-04-20 20:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-18 18:55 [PATCH] powerpc: Make rtas console _much_ faster Michael Ellerman
2006-04-18 19:30 ` Olof Johansson
2006-04-20 20:03 ` Ryan Arnold
2006-04-20 20:25 ` Ryan Arnold [this message]
2006-05-03 7:42 ` question on why hvc_console calls hvc_poll() in hvc_handle_interrupt() Michael Ellerman
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