From: Christoph Lameter <clameter@sgi.com>
To: David Miller <davem@davemloft.net>
Cc: arjan@infradead.org, akpm@linux-foundation.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org, ak@suse.de,
travis@sgi.com
Subject: Re: [14/18] Configure stack size
Date: Thu, 4 Oct 2007 12:34:07 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0710041231590.12221@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20071003.214306.41634525.davem@davemloft.net>
On Wed, 3 Oct 2007, David Miller wrote:
> > there is still code that does DMA from and to the stack....
> > how would this work with virtual allocated stack?
>
> That's a bug and must be fixed.
>
> There honestly shouldn't be that many examples around.
>
> FWIW, there are platforms using a virtually allocated kernel stack
> already.
There would be a way to address this by checking in the DMA layer for a
virtually mapped page and then segmenting I/O at the page boundaries to
the individual pages. We may need that anyways for large block sizes.
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next prev parent reply other threads:[~2007-10-04 19:34 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-04 3:59 [00/18] Virtual Compound Page Support V2 Christoph Lameter
2007-10-04 3:59 ` [01/18] vmalloc: clean up page array indexing Christoph Lameter
2007-10-04 3:59 ` [02/18] vunmap: return page array passed on vmap() Christoph Lameter
2007-10-04 3:59 ` [03/18] vmalloc_address(): Determine vmalloc address from page struct Christoph Lameter
2007-10-04 3:59 ` [04/18] Vcompound: Smart up virt_to_head_page() Christoph Lameter
2007-10-04 3:59 ` [05/18] Page flags: Add PageVcompound() Christoph Lameter
2007-10-04 3:59 ` [06/18] Vcompound: Update page address determination Christoph Lameter
2007-10-04 3:59 ` [07/18] Vcompound: Add compound_nth_page() to determine nth base page Christoph Lameter
2007-10-04 3:59 ` [08/18] GFP_VFALLBACK: Allow fallback of compound pages to virtual mappings Christoph Lameter
2007-10-04 3:59 ` [09/18] Vcompound: GFP_VFALLBACK debugging aid Christoph Lameter
2007-10-04 3:59 ` [10/18] Sparsemem: Use fallback for the memmap Christoph Lameter
2007-10-04 3:59 ` [11/18] Page allocator: Use a higher order allocation for the zone wait table Christoph Lameter
2007-10-04 3:59 ` [12/18] Wait: Allow bit_waitqueue to wait on a bit in a virtual compound page Christoph Lameter
2007-10-04 3:59 ` [13/18] x86_64: Allow fallback for the stack Christoph Lameter
2007-10-04 11:56 ` Andi Kleen
2007-10-04 12:08 ` Peter Zijlstra
2007-10-04 12:25 ` Andi Kleen
2007-10-04 12:30 ` Peter Zijlstra
2007-10-04 17:40 ` Christoph Lameter
2007-10-04 19:20 ` Christoph Lameter
2007-10-04 19:39 ` Rik van Riel
2007-10-04 21:20 ` Christoph Lameter
2007-10-07 7:35 ` Nick Piggin
2007-10-08 17:36 ` Christoph Lameter
2007-10-08 12:55 ` Nick Piggin
2007-10-09 18:39 ` Christoph Lameter
2007-10-09 8:46 ` Nick Piggin
2007-10-10 1:26 ` Christoph Lameter
2007-10-09 9:56 ` Nick Piggin
2007-10-10 3:36 ` where to get ZONE_MOVABLE pathces? Jacky(GuangXiang Lee)
2007-10-10 10:32 ` Mel Gorman
2007-10-06 18:53 ` [13/18] x86_64: Allow fallback for the stack Bill Davidsen
2007-10-04 3:59 ` [14/18] Configure stack size Christoph Lameter
2007-10-04 4:36 ` Arjan van de Ven
2007-10-04 4:43 ` David Miller, Arjan van de Ven
2007-10-04 19:34 ` Christoph Lameter [this message]
2007-10-04 9:11 ` Andi Kleen
2007-10-04 19:26 ` Christoph Lameter
2007-10-04 3:59 ` [15/18] Fallback for temporary order 2 allocation Christoph Lameter
2007-10-04 3:59 ` [16/18] Virtual Compound page allocation from interrupt context Christoph Lameter
2007-10-04 3:59 ` [17/18] Virtual compound page freeing in " Christoph Lameter
2007-10-04 3:59 ` [18/18] SLUB: Use fallback for table of callers/freers of a slab cache Christoph Lameter
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