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dkim=none X-RZG-AUTH: ":P2EQZWCpfu+qG7CngxMFH1J+3q8wa/QLpd5ylWvMDX3y/OuD5rXVisEsVR6GbU3svGYLiH9zFD0wpO7hNb2D/K88Gfjs" X-RZG-CLASS-ID: mo00 Date: Wed, 28 Apr 2021 13:03:46 +0200 From: Olaf Hering To: Jan Beulich Cc: xen-devel@lists.xenproject.org Subject: Re: obtain a list of granttable PFNs from toolstack Message-ID: <20210428130346.2477ffda.olaf@aepfle.de> In-Reply-To: References: <20210428095049.14a8272b.olaf@aepfle.de> <8427397f-0953-94df-04f6-8dfe2a4ceee8@suse.com> <20210428121701.3272b369.olaf@aepfle.de> X-Mailer: Claws Mail 2021.04.23 (GTK+ 2.24.32; x86_64-suse-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/sqePbG.ExxylZ16qgiB28K="; protocol="application/pgp-signature"; micalg=pgp-sha256 --Sig_/sqePbG.ExxylZ16qgiB28K= Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Am Wed, 28 Apr 2021 12:42:54 +0200 schrieb Jan Beulich : > It might help if you would outline what you're actually after by > knowing a domain's active grants. There is REC_TYPE_VERIFY, which will re-transmit all memory of a paused dom= U and compare what was previously transferred. Last time I used it a large = number of pages are different. I did not spent time to dig further into it,= what pfns are affected, how the pages differ. I suspect the backends do st= ill write into the granted pages, hence the question. I think the domU may undo all grants during its suspend anyway, that is som= ething to explore as well. 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