On 02/24/2016 09:15 AM, Andrew Cooper wrote:
On 24/02/16 14:12, David Vrabel wrote:
On 22/02/16 22:06, Boris Ostrovsky wrote:
Baremetal kernels clear .bss early in the boot. Since Xen PV guests don't
excecute that early code they should do it too.
(Since we introduce macros for specifying 32- and 64-bit registers we
can get rid of ifdefs in startup_xen())
.bss must have been cleared for PV guests otherwise they would be
horribly broken. What was the method and why is it no longer sufficient?
I couldn't find this being done anywhere, hence this patch.
The domain builder hands out zeroed pages. I don't believe we guarantee
that the guests RAM is clean, but it is in practice.
OK, that's what I suspected but didn't actually look.
I, in fact, wonder whether this should go to stable trees as well.
-boris
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