From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: rohitseth@google.com, Mike Stroyan <mike.stroyan@hp.com>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hugh@veritas.com>,
"Luck, Tony" <tony.luck@intel.com>,
linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Fw: [PATCH] ia64: race flushing icache in do_no_page path
Date: Sat, 28 Apr 2007 03:04:40 +0000 [thread overview]
Message-ID: <4632B9C8.40400@yahoo.com.au> (raw)
In-Reply-To: <4632AAB4.6030303@yahoo.com.au>
Nick Piggin wrote:
> What if you were to say remove all the PG_arch_1 code, and do something
> really simple like flush icache in flush_dcache_page? Would performance
> suffer horribly?
OIC, you need a virtual address to evict the icache, so you can't
flush at flush_dcache time? Or does ia64 have an instruction to
flush the whole icache? (it would be worth testing, to see how much
performance suffers).
--
SUSE Labs, Novell Inc.
WARNING: multiple messages have this Message-ID (diff)
From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: rohitseth@google.com, Mike Stroyan <mike.stroyan@hp.com>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hugh@veritas.com>,
"Luck, Tony" <tony.luck@intel.com>,
linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Fw: [PATCH] ia64: race flushing icache in do_no_page path
Date: Sat, 28 Apr 2007 13:04:40 +1000 [thread overview]
Message-ID: <4632B9C8.40400@yahoo.com.au> (raw)
In-Reply-To: <4632AAB4.6030303@yahoo.com.au>
Nick Piggin wrote:
> What if you were to say remove all the PG_arch_1 code, and do something
> really simple like flush icache in flush_dcache_page? Would performance
> suffer horribly?
OIC, you need a virtual address to evict the icache, so you can't
flush at flush_dcache time? Or does ia64 have an instruction to
flush the whole icache? (it would be worth testing, to see how much
performance suffers).
--
SUSE Labs, Novell Inc.
next prev parent reply other threads:[~2007-04-28 3:04 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070425205548.fd51b301.akpm@linux-foundation.org>
2007-04-26 7:53 ` Fw: [PATCH] ia64: race flushing icache in do_no_page path Nick Piggin
2007-04-26 7:53 ` Nick Piggin
2007-04-26 17:35 ` Mike Stroyan
2007-04-26 17:35 ` Mike Stroyan
2007-04-27 11:55 ` Nick Piggin
2007-04-27 11:55 ` Nick Piggin
2007-04-27 14:18 ` Hugh Dickins
2007-04-27 14:18 ` Hugh Dickins
2007-04-27 17:02 ` David Mosberger-Tang
2007-04-27 17:02 ` David Mosberger-Tang
2007-04-28 1:31 ` Rohit Seth
2007-04-28 1:31 ` Rohit Seth
2007-04-28 5:34 ` Hugh Dickins
2007-04-28 5:34 ` Hugh Dickins
2007-04-28 2:16 ` Nick Piggin
2007-04-28 2:16 ` Nick Piggin
2007-04-28 1:24 ` Rohit Seth
2007-04-28 1:24 ` Rohit Seth
2007-04-28 2:00 ` Nick Piggin
2007-04-28 2:00 ` Nick Piggin
2007-04-26 0:16 ` Mike Stroyan
2007-04-26 0:16 ` Mike Stroyan
2007-04-28 17:57 ` Fw: " Rohit Seth
2007-04-28 17:57 ` Rohit Seth
2007-05-01 11:39 ` Nick Piggin
2007-05-01 11:39 ` Nick Piggin
2007-05-02 0:36 ` Rohit Seth
2007-05-02 0:36 ` Rohit Seth
2007-05-02 1:57 ` Nick Piggin
2007-05-02 1:57 ` Nick Piggin
2007-04-28 18:05 ` Rohit Seth
2007-04-28 18:05 ` Rohit Seth
2007-05-01 11:43 ` Nick Piggin
2007-05-01 11:43 ` Nick Piggin
2007-05-04 21:32 ` Mike Stroyan
2007-05-04 21:32 ` Mike Stroyan
2007-04-28 18:17 ` Rohit Seth
2007-04-28 18:17 ` Rohit Seth
2007-05-01 11:52 ` Nick Piggin
2007-05-01 11:52 ` Nick Piggin
2007-05-02 0:36 ` Rohit Seth
2007-05-02 0:36 ` Rohit Seth
2007-05-02 2:05 ` Nick Piggin
2007-05-02 2:05 ` Nick Piggin
2007-04-28 18:30 ` Rohit Seth
2007-04-28 18:30 ` Rohit Seth
2007-05-01 11:47 ` Nick Piggin
2007-05-01 11:47 ` Nick Piggin
2007-05-02 0:36 ` Rohit Seth
2007-05-02 0:36 ` Rohit Seth
2007-07-04 14:24 ` Zoltan Menyhart
2007-07-04 14:24 ` Zoltan Menyhart
2007-07-04 16:58 ` KAMEZAWA Hiroyuki
2007-07-04 16:58 ` KAMEZAWA Hiroyuki
2007-07-05 8:57 ` Zoltan Menyhart
2007-07-05 8:57 ` Zoltan Menyhart
2007-07-05 17:36 ` Mike Stroyan
2007-07-05 17:36 ` Mike Stroyan
2007-04-28 3:04 ` Nick Piggin [this message]
2007-04-28 3:04 ` Nick Piggin
2007-04-28 5:20 ` Hugh Dickins
2007-04-28 5:20 ` Hugh Dickins
2007-04-28 6:03 ` Nick Piggin
2007-04-28 6:03 ` Nick Piggin
2007-04-28 4:11 ` Nick Piggin
2007-04-28 4:11 ` Nick Piggin
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