From: David Miller <davem@davemloft.net>
From: Christoph Lameter <clameter@sgi.com>
To: clameter@sgi.com
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86
Date: Fri, 21 Mar 2008 14:57:12 -0700 (PDT) [thread overview]
Date: Fri, 21 Mar 2008 10:40:18 -0700 (PDT) [thread overview]
Message-ID: <20080321.145712.198736315.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0803211037140.18671@schroedinger.engr.sgi.com>
> On Fri, 21 Mar 2008, David Miller wrote:
>
> > I would be very careful with this especially on IA64.
> >
> > If the TLB miss or other low-level trap handler depends upon being
> > able to dereference thread info, task struct, or kernel stack stuff
> > without causing a fault outside of the linear PAGE_OFFSET area, this
> > patch will cause problems.
>
> Hmmm. Does not sound good for arches that cannot handle TLB misses in
> hardware. I wonder how arch specific this is? Last time around I was told
> that some arches already virtually map their stacks.
I'm not saying there is a problem, I'm saying "tread lightly"
because there might be one.
The thing to do is to first validate the way that IA64
handles recursive TLB misses occuring during an initial
TLB miss, and if there are any limitations therein.
That's the kind of thing I'm talking about.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-03-21 21:57 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-21 6:17 [00/14] Virtual Compound Page Support V3 Christoph Lameter
2008-03-21 6:17 ` [01/14] vcompound: Return page array on vunmap Christoph Lameter
2008-03-21 6:17 ` [02/14] vcompound: pageflags: Add PageVcompound() Christoph Lameter
2008-03-21 6:17 ` [03/14] vmallocinfo: Support display of vcompound for a virtual compound page Christoph Lameter
2008-03-21 7:55 ` Eric Dumazet
2008-03-21 17:32 ` Christoph Lameter
2008-03-21 6:17 ` [04/14] vcompound: Core piece Christoph Lameter
2008-03-22 12:10 ` KOSAKI Motohiro
2008-03-24 18:28 ` Christoph Lameter
2008-03-21 6:17 ` [05/14] vcompound: Debugging aid Christoph Lameter
2008-03-21 6:17 ` [06/14] vcompound: Virtual fallback for sparsemem Christoph Lameter
2008-03-21 6:17 ` [07/14] vcompound: bit waitqueue support Christoph Lameter
2008-03-21 6:17 ` [08/14] vcompound: Fallback for zone wait table Christoph Lameter
2008-03-21 6:17 ` [09/14] vcompound: crypto: Fallback for temporary order 2 allocation Christoph Lameter
2008-03-21 6:17 ` [10/14] vcompound: slub: Use for buffer to correlate allocation addresses Christoph Lameter
2008-03-21 6:17 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 Christoph Lameter
2008-03-21 7:25 ` David Miller, Christoph Lameter
2008-03-21 8:39 ` Ingo Molnar
2008-03-21 17:33 ` Christoph Lameter
2008-03-21 19:02 ` Ingo Molnar
2008-03-21 19:04 ` Christoph Lameter
2008-03-21 17:40 ` Christoph Lameter
2008-03-21 21:57 ` David Miller, Christoph Lameter [this message]
2008-03-24 18:27 ` Christoph Lameter
2008-03-24 20:37 ` larger default page sizes David Miller, Christoph Lameter
2008-03-24 21:05 ` Christoph Lameter
2008-03-24 21:43 ` David Miller, Christoph Lameter
2008-03-25 17:48 ` Christoph Lameter
2008-03-25 23:22 ` David Miller, Christoph Lameter
2008-03-25 23:41 ` Peter Chubb
2008-03-25 23:49 ` David Miller, Peter Chubb
2008-03-26 0:25 ` Peter Chubb
2008-03-26 0:31 ` David Miller, Peter Chubb
2008-03-26 0:34 ` David Mosberger-Tang
2008-03-26 0:39 ` David Miller, David Mosberger-Tang
2008-03-26 0:57 ` Peter Chubb
2008-03-26 4:16 ` John Marvin
2008-03-26 4:36 ` David Miller, John Marvin
2008-03-24 21:25 ` Luck, Tony
2008-03-24 21:46 ` David Miller, Luck, Tony
2008-03-25 3:29 ` Paul Mackerras
2008-03-25 4:15 ` David Miller, Paul Mackerras
2008-03-25 11:50 ` Paul Mackerras
2008-03-25 23:32 ` David Miller, Paul Mackerras
2008-03-25 23:49 ` Luck, Tony
2008-03-26 0:16 ` David Miller, Luck, Tony
2008-03-26 15:54 ` Nish Aravamudan
2008-03-26 17:05 ` Luck, Tony
2008-03-26 18:54 ` Mel Gorman
2008-03-25 12:05 ` Andi Kleen
2008-03-25 21:27 ` Paul Mackerras
2008-03-26 5:24 ` Paul Mackerras
2008-03-26 15:59 ` Linus Torvalds
2008-03-27 1:08 ` Paul Mackerras
2008-03-26 17:56 ` Christoph Lameter
2008-03-26 23:21 ` David Miller, Christoph Lameter
2008-03-27 3:00 ` Paul Mackerras
2008-03-25 18:27 ` Dave Hansen
2008-03-24 21:13 ` [11/14] vcompound: Fallbacks for order 1 stack allocations on IA64 and x86 Luck, Tony
2008-03-25 17:42 ` Christoph Lameter
2008-03-25 19:09 ` Luck, Tony
2008-03-25 19:25 ` Christoph Lameter
2008-03-21 22:30 ` Andi Kleen
2008-03-24 19:53 ` Christoph Lameter
2008-03-25 7:51 ` Andi Kleen
2008-03-25 17:55 ` Christoph Lameter
2008-03-25 18:07 ` Andi Kleen
2008-03-21 6:17 ` [12/14] vcompound: Avoid vmalloc in e1000 driver Christoph Lameter
2008-03-21 17:27 ` Kok, Auke
2008-03-21 6:17 ` [13/14] vcompound: Use vcompound for swap_map Christoph Lameter
2008-03-21 21:25 ` Andi Kleen
2008-03-21 21:33 ` Christoph Lameter
2008-03-24 19:54 ` Christoph Lameter
2008-03-25 7:52 ` Andi Kleen
2008-03-25 17:45 ` Christoph Lameter
2008-03-25 17:55 ` Andi Kleen
2008-03-25 17:51 ` Christoph Lameter
2008-03-21 6:17 ` [14/14] vcompound: Avoid vmalloc for ehash_locks Christoph Lameter
2008-03-21 7:02 ` Eric Dumazet
2008-03-21 7:03 ` Christoph Lameter
2008-03-21 7:31 ` David Miller, Christoph Lameter
2008-03-21 7:42 ` Eric Dumazet
2008-03-21 7:31 ` David Miller, Eric Dumazet
2008-03-21 17:31 ` Christoph Lameter
2008-03-22 18:40 ` [00/14] Virtual Compound Page Support V3 Arjan van de Ven
2008-03-24 18:31 ` Christoph Lameter
2008-03-24 19:29 ` Christoph Lameter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080321.145712.198736315.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=clameter@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox