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Re: [Xen-devel] Possible regression: XEN 4.0.0 total_memory decrease

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Possible regression: XEN 4.0.0 total_memory decrease
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Fri, 16 Apr 2010 08:53:26 +0100
Cc: "Xen-devel@xxxxxxxxxxxxxxxxxxx" <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Alex Williams <awilliams@xxxxxxxx>
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>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 15.04.10 20:23 >>>
>I've fixed this regression as xen-unstable:21190 and xen-4.0-testing:21114.
>The fix will appear in Xen 4.0.1.

That seems wrong to me - I specifically changed the accounting so
that pieces not used from the E820 map (which can no longer be cut
off in e820.c, as that code doesn't know *where* to cut off) won't
get reported as available memory. The real question is where (for
the non-cut-off case) the two calculations differ.

Jan


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