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xc_dom_alloc_segment() zero-filling its output
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 20 Sep 2021 11:45:19 +0200
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- Cc: Ian Jackson <iwj@xxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Mon, 20 Sep 2021 09:45:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hello,
originally I was puzzled to find that libxenguest's setting up of
struct hvm_start_info didn't have any explicit clearing of reserved
fields. Turns out the memory gets zeroed right after allocation.
Isn't this a waste of bandwidth particularly when considering the
kernel, initrd, or P2M segments, which may be large and which are
going to get filled with actual (non-zero) data anyway?
Thanks, Jan
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