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From: Petr Tesarik <ptesarik@suse.cz>
To: "Trapp, Norbert" <norbert.trapp@ts.fujitsu.com>
Cc: "kexec@lists.infradead.org" <kexec@lists.infradead.org>
Subject: Re: [PATCHv3 0/9] Support Xen versions up to xen-4.1
Date: Tue, 28 Aug 2012 12:02:20 +0200	[thread overview]
Message-ID: <201208281202.21176.ptesarik@suse.cz> (raw)
In-Reply-To: <0E9227E8EFCFF54EA493F6C0399C015D39BF96EA84@ABGEX70E.FSC.NET>

Dne Po 27. srpna 2012 18:19:20 Trapp, Norbert napsal(a):
>[...]
> > I could also add the performance improvements, but I'm afraid it would
> > make for an incremental patch, so let's wait until the filtering is
> > finally right.
> 
> Alright to abandon the performance improvements for the time being
> but I would vote for adding the 1GB page recognition. That is:
> ...(pgd_entry & _PAGE_PSE)... in kvto_xen_x86_64. I think you would need
> a huge amount of memory to recognize this problem.

Oh! I missed the part that adds support for 1G pages. This is not merely 
performance improvement, but a bugfix - the routine is not able to translate 
1G mappings without the change.

The thing with 1G pages is that they are not available on all platforms (AFAIK 
only AMD has them).

Anyway, it should be two patches, in fact. Please stay tuned.

Petr Tesarik
SUSE Linux

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  parent reply	other threads:[~2012-08-28 10:02 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-24 15:46 [PATCHv3 0/9] Support Xen versions up to xen-4.1 Petr Tesarik
2012-08-27  7:20 ` Atsushi Kumagai
2012-08-27 16:19 ` Trapp, Norbert
2012-08-27 16:41   ` Petr Tesarik
2012-08-28 10:02   ` Petr Tesarik [this message]
  -- strict thread matches above, loose matches on Subject: below --
2012-08-24 15:41 Petr Tesařík
2012-08-31 15:05 ` Trapp, Norbert
2012-09-03  5:01   ` Atsushi Kumagai
2012-09-12 14:39     ` Trapp, Norbert
2012-09-17 12:38       ` Stefan Bader
2012-09-17 16:52         ` Trapp, Norbert
2012-09-18  6:38           ` Atsushi Kumagai

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