From: Tejun Heo <tj@kernel.org>
To: suresh.b.siddha@intel.com
Cc: "JBeulich@novell.com" <JBeulich@novell.com>,
"andi@firstfloor.org" <andi@firstfloor.org>,
"mingo@elte.hu" <mingo@elte.hu>,
"linux-kernel-owner@vger.kernel.org"
<linux-kernel-owner@vger.kernel.org>,
"hpa@zytor.com" <hpa@zytor.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [GIT PATCH] x86,percpu: fix pageattr handling with remap allocator
Date: Sun, 17 May 2009 00:16:40 +0900 [thread overview]
Message-ID: <4A0ED8D8.2010303@kernel.org> (raw)
In-Reply-To: <1242436626.27006.8623.camel@localhost.localdomain>
Hello, Suresh.
Suresh Siddha wrote:
> Tejun, Can you please educate me why we need to map this first
> percpu chunk (which is pre-allocated during boot and is physically
> contiguous) into vmalloc area?
To make areas for each cpu congruent such that the address offset of a
percpu symbol for CPU N is always the same from the address for CPU 0.
> Perhaps even for the other dynamically allocated secondary chunks?
> (as far as I can see, all the chunk allocations seems to be
> physically contiguous and later mapped into vmalloc area)..
>
> That should simplify these things quite a bit(atleast for first
> percpu chunk). I am missing something obvious I guess.
Hmm... Sorry I don't really follow. Can you please elaborate the
question?
thanks.
--
tejun
next prev parent reply other threads:[~2009-05-16 15:15 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-14 12:49 [GIT PATCH] x86,percpu: fix pageattr handling with remap allocator Tejun Heo
2009-05-14 12:49 ` [PATCH 1/4] x86: prepare setup_pcpu_remap() for pageattr fix Tejun Heo
2009-05-14 12:49 ` [PATCH 2/4] x86: simplify cpa_process_alias() Tejun Heo
2009-05-14 14:16 ` Jan Beulich
2009-05-14 15:37 ` Tejun Heo
2009-05-14 16:20 ` [PATCH UPDATED 2/4] x86: reorganize cpa_process_alias() Tejun Heo
2009-05-14 12:49 ` [PATCH 3/4] x86: fix pageattr handling for remap percpu allocator Tejun Heo
2009-05-14 16:21 ` [PATCH UPDATED " Tejun Heo
2009-05-14 12:49 ` [PATCH 4/4] x86: implement percpu_alloc kernel parameter Tejun Heo
2009-05-14 14:28 ` [GIT PATCH] x86,percpu: fix pageattr handling with remap allocator Jan Beulich
2009-05-14 15:55 ` Tejun Heo
2009-05-15 7:47 ` Jan Beulich
2009-05-15 8:11 ` Tejun Heo
2009-05-15 8:22 ` Jan Beulich
2009-05-15 8:27 ` Tejun Heo
2009-05-14 16:22 ` Tejun Heo
2009-05-15 4:00 ` Tejun Heo
2009-05-15 4:36 ` David Miller
2009-05-15 4:48 ` Tejun Heo
2009-05-16 1:17 ` Suresh Siddha
2009-05-16 15:16 ` Tejun Heo [this message]
2009-05-16 19:09 ` Suresh Siddha
2009-05-17 1:23 ` Tejun Heo
2009-05-18 19:20 ` Suresh Siddha
2009-05-18 19:41 ` H. Peter Anvin
2009-05-18 21:07 ` Suresh Siddha
2009-05-19 1:28 ` Tejun Heo
2009-05-20 23:01 ` Suresh Siddha
2009-05-21 0:08 ` Tejun Heo
2009-05-21 0:36 ` Suresh Siddha
2009-05-21 1:46 ` Tejun Heo
2009-05-21 1:48 ` Tejun Heo
2009-05-21 19:10 ` Suresh Siddha
2009-05-21 23:18 ` Tejun Heo
2009-05-22 0:55 ` Suresh Siddha
2009-05-19 9:44 ` Tejun Heo
2009-05-20 7:54 ` Ingo Molnar
2009-05-20 7:57 ` Tejun Heo
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