From: David Vrabel <david.vrabel@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: Linux/x86's _PAGE_SWP_SOFT_DIRTY definition
Date: Wed, 21 Aug 2013 12:47:37 +0100 [thread overview]
Message-ID: <5214A8D9.20509@citrix.com> (raw)
In-Reply-To: <52148B8D02000078000ED3C8@nat28.tlf.novell.com>
On 21/08/13 08:42, Jan Beulich wrote:
> All,
>
> was anyone of you involved in the recent (rc5->rc6) changes here?
> I'm asking because this new definition conflicts with _PAGE_PAT,
> which is unused only for native Linux (and I continue to not really
> understand their motivation to restrict themselves to just the four
> most trivial memory types).
I was not aware of it and that just looks broken -- not just Xen but it
looks like it wouldn't work with (transparent) huge pages either.
The soft dirty tracking was introduced (in 3.11-rc1) by 0f8975ec4 (mm:
soft-dirty bits for user memory changes tracking) and the problematic
patch adding the conflicting PTE bit is 179ef71cb (mm: save soft-dirty
bits on swapped pages).
David
next prev parent reply other threads:[~2013-08-21 11:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-21 7:42 Linux/x86's _PAGE_SWP_SOFT_DIRTY definition Jan Beulich
2013-08-21 10:50 ` Konrad Rzeszutek Wilk
2013-08-21 11:45 ` Jan Beulich
2013-08-21 11:47 ` David Vrabel [this message]
2013-08-21 11:58 ` Konrad Rzeszutek Wilk
2013-08-21 12:38 ` David Vrabel
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