From 11852c7bb070a18c3708b4c001772a23e7d4fc27 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Thu, 24 Sep 2020 16:36:48 +0200 Subject: [PATCH] tools/xenstore: set maximum number of grants needed When running as a stubdom Xenstore should set the maximum number of grants needed via a call of xengnttab_set_max_grants(), as otherwise the number of domains which can be supported will be 128 only (the default number of grants supported by Mini-OS). We use one grant per domain so the theoretical maximum number is DOMID_FIRST_RESERVED. Signed-off-by: Juergen Gross Acked-by: Wei Liu --- tools/xenstore/xenstored_domain.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/xenstore/xenstored_domain.c b/tools/xenstore/xenstored_domain.c index 06359503f0..0d5495745b 100644 --- a/tools/xenstore/xenstored_domain.c +++ b/tools/xenstore/xenstored_domain.c @@ -631,6 +631,12 @@ void domain_init(void) if (*xgt_handle == NULL) barf_perror("Failed to open connection to gnttab"); + /* + * Allow max number of domains for mappings. We allow one grant per + * domain so the theoretical maximum is DOMID_FIRST_RESERVED. + */ + xengnttab_set_max_grants(*xgt_handle, DOMID_FIRST_RESERVED); + talloc_set_destructor(xgt_handle, close_xgt_handle); xce_handle = xenevtchn_open(NULL, 0); -- 2.30.2