From: Andi Kleen <ak@suse.de>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>,
linux-kernel@vger.kernel.org, gregkh@suse.de, muli@il.ibm.com,
asit.k.mallick@intel.com, suresh.b.siddha@intel.com,
arjan@linux.intel.com, ashok.raj@intel.com, shaohua.li@intel.com,
davem@davemloft.net
Subject: Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling
Date: Sat, 9 Jun 2007 00:31:04 +0200 [thread overview]
Message-ID: <200706090031.05531.ak@suse.de> (raw)
In-Reply-To: <20070608135555.e580ada3.akpm@linux-foundation.org>
On Friday 08 June 2007 22:55, Andrew Morton wrote:
> On Fri, 8 Jun 2007 22:43:10 +0200 (CEST)
>
> Andreas Kleen <ak@suse.de> wrote:
> > > That's what kmem_cache_alloc() is for?!?!
> >
> > Tradtionally that was not allowed in block layer path. Not sure
> > it is fully obsolete with the recent dirty tracking work, probably not.
> >
> > Besides it would need to be GFP_ATOMIC and the default
> > atomic pools are not that big.
>
> That in itself is a problem. What do we have to do to be able
> to make these allocations use the *much* stronger GFP_NOIO?
That still sleeps.
Allow networking and block drivers (and other device drivers) to
map SGs without holding spinlocks.
Would be major work. I've been asking for it for years
because it would also avoid other nasty problem, like the panic-on-overflow
issues with swiotlb/AMD GART iommu -- it could just block for free
space instead.
-Andi
next prev parent reply other threads:[~2007-06-08 22:32 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-06 18:56 [Intel-IOMMU 00/10] Intel IOMMU Support anil.s.keshavamurthy
2007-06-06 18:56 ` [Intel-IOMMU 01/10] DMAR detection and parsing logic anil.s.keshavamurthy
2007-06-06 18:57 ` [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling anil.s.keshavamurthy
2007-06-07 23:27 ` Andrew Morton
2007-06-08 18:21 ` Keshavamurthy, Anil S
2007-06-08 19:01 ` Andrew Morton
2007-06-08 20:12 ` Keshavamurthy, Anil S
2007-06-08 20:40 ` Siddha, Suresh B
2007-06-08 20:44 ` Andrew Morton
2007-06-08 22:33 ` Christoph Lameter
2007-06-08 22:49 ` Keshavamurthy, Anil S
2007-06-08 20:43 ` Andreas Kleen
2007-06-08 20:55 ` Andrew Morton
2007-06-08 22:31 ` Andi Kleen [this message]
2007-06-08 21:20 ` Keshavamurthy, Anil S
2007-06-08 21:42 ` Andrew Morton
2007-06-08 22:17 ` Arjan van de Ven
2007-06-08 22:18 ` Siddha, Suresh B
2007-06-08 22:38 ` Christoph Lameter
2007-06-08 22:36 ` Christoph Lameter
2007-06-08 22:56 ` Andi Kleen
2007-06-08 22:59 ` Christoph Lameter
2007-06-09 9:47 ` Andi Kleen
2007-06-11 20:44 ` Keshavamurthy, Anil S
2007-06-11 21:14 ` Andrew Morton
2007-06-11 9:46 ` Ashok Raj
2007-06-11 22:16 ` Andi Kleen
2007-06-11 23:28 ` Christoph Lameter
2007-06-11 23:52 ` Keshavamurthy, Anil S
2007-06-12 0:30 ` Andrew Morton
2007-06-12 1:10 ` Arjan van de Ven
2007-06-12 1:30 ` Christoph Lameter
2007-06-12 1:35 ` Andrew Morton
2007-06-12 1:55 ` Arjan van de Ven
2007-06-12 2:08 ` Siddha, Suresh B
2007-06-13 18:40 ` Matt Mackall
2007-06-13 19:04 ` Andi Kleen
2007-06-12 0:38 ` Christoph Lameter
2007-06-11 21:29 ` Christoph Lameter
2007-06-11 21:40 ` Keshavamurthy, Anil S
2007-06-11 22:25 ` Andi Kleen
2007-06-11 11:29 ` Ashok Raj
2007-06-11 23:15 ` Keshavamurthy, Anil S
2007-06-08 22:32 ` Christoph Lameter
2007-06-08 22:45 ` Keshavamurthy, Anil S
2007-06-08 22:55 ` Christoph Lameter
2007-06-10 16:38 ` Arjan van de Ven
2007-06-11 16:10 ` Christoph Lameter
2007-06-06 18:57 ` [Intel-IOMMU 03/10] PCI generic helper function anil.s.keshavamurthy
2007-06-06 18:57 ` [Intel-IOMMU 04/10] clflush_cache_range now takes size param anil.s.keshavamurthy
2007-06-06 18:57 ` [Intel-IOMMU 05/10] IOVA allocation and management routines anil.s.keshavamurthy
2007-06-07 23:34 ` Andrew Morton
2007-06-08 18:25 ` Keshavamurthy, Anil S
2007-06-06 18:57 ` [Intel-IOMMU 06/10] Intel IOMMU driver anil.s.keshavamurthy
2007-06-07 23:57 ` Andrew Morton
2007-06-08 22:30 ` Christoph Lameter
2007-06-13 20:20 ` Keshavamurthy, Anil S
2007-06-06 18:57 ` [Intel-IOMMU 07/10] Intel iommu cmdline option - forcedac anil.s.keshavamurthy
2007-06-07 23:58 ` Andrew Morton
2007-06-06 18:57 ` [Intel-IOMMU 08/10] DMAR fault handling support anil.s.keshavamurthy
2007-06-06 18:57 ` [Intel-IOMMU 09/10] Iommu Gfx workaround anil.s.keshavamurthy
2007-06-08 0:01 ` Andrew Morton
2007-06-06 18:57 ` [Intel-IOMMU 10/10] Iommu floppy workaround anil.s.keshavamurthy
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