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pr=C From: Jason Andryuk To: CC: Jason Andryuk , Anthony PERARD Subject: [PATCH v2 1/2] xl: Keep monitoring suspended domain Date: Tue, 26 Nov 2024 12:19:40 -0500 Message-ID: <20241126171941.170897-2-jason.andryuk@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241126171941.170897-1-jason.andryuk@amd.com> References: <20241126171941.170897-1-jason.andryuk@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B06B:EE_|MW6PR12MB8900:EE_ X-MS-Office365-Filtering-Correlation-Id: 147dd5bd-b82b-443a-eaae-08dd0e3e8b76 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Nov 2024 17:19:54.6441 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 147dd5bd-b82b-443a-eaae-08dd0e3e8b76 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B06B.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8900 When a VM transitioned to LIBXL_SHUTDOWN_REASON_SUSPEND, the xl daemon was exiting as 0 = DOMAIN_RESTART_NONE "No domain restart". Later, when the VM actually shutdown, the missing xl daemon meant the domain wasn't cleaned up properly. Add a new DOMAIN_RESTART_SUSPENDED to handle the case. The xl daemon keeps running to react to future shutdown events. The domain death event needs to be re-enabled to catch subsequent events. The libxl_evgen_domain_death is moved from death_list to death_reported, and then it isn't found on subsequent iterations through death_list. We enable the new event before disabling the old event, to keep the xenstore watch active. If it is unregistered and re-registered, it'll fire immediately for our suspended domain which will end up continuously re-triggering. Signed-off-by: Jason Andryuk --- tools/xl/xl.h | 1 + tools/xl/xl_vmcontrol.c | 18 +++++++++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/tools/xl/xl.h b/tools/xl/xl.h index 9c86bb1d98..967d034cfe 100644 --- a/tools/xl/xl.h +++ b/tools/xl/xl.h @@ -301,6 +301,7 @@ typedef enum { DOMAIN_RESTART_NORMAL, /* Domain should be restarted */ DOMAIN_RESTART_RENAME, /* Domain should be renamed and restarted */ DOMAIN_RESTART_SOFT_RESET, /* Soft reset should be performed */ + DOMAIN_RESTART_SUSPENDED, /* Domain suspended - keep looping */ } domain_restart_type; extern void printf_info_sexp(int domid, libxl_domain_config *d_config, FILE *fh); diff --git a/tools/xl/xl_vmcontrol.c b/tools/xl/xl_vmcontrol.c index fa1a4420e3..c45d497c28 100644 --- a/tools/xl/xl_vmcontrol.c +++ b/tools/xl/xl_vmcontrol.c @@ -417,7 +417,7 @@ static domain_restart_type handle_domain_death(uint32_t *r_domid, break; case LIBXL_SHUTDOWN_REASON_SUSPEND: LOG("Domain has suspended."); - return 0; + return DOMAIN_RESTART_SUSPENDED; case LIBXL_SHUTDOWN_REASON_CRASH: action = d_config->on_crash; break; @@ -1030,6 +1030,7 @@ start: } } while (1) { + libxl_evgen_domain_death *deathw2 = NULL; libxl_event *event; ret = domain_wait_event(domid, &event); if (ret) goto out; @@ -1100,9 +1101,24 @@ start: ret = 0; goto out; + case DOMAIN_RESTART_SUSPENDED: + LOG("Continue waiting for domain %u", domid); + /* + * Enable a new event before disabling the old. This ensures + * the xenstore watch remains active. Otherwise it'll fire + * immediately on re-registration and find our suspended domain. + */ + ret = libxl_evenable_domain_death(ctx, domid, 0, &deathw2); + if (ret) goto out; + libxl_evdisable_domain_death(ctx, deathw); + deathw = deathw2; + deathw2 = NULL; + break; + default: abort(); } + break; case LIBXL_EVENT_TYPE_DOMAIN_DEATH: LOG("Domain %u has been destroyed.", domid); From patchwork Tue Nov 26 17:19:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jason Andryuk X-Patchwork-Id: 13886245 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 10C5CD65531 for ; Tue, 26 Nov 2024 17:20:19 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.843946.1259522 (Exim 4.92) (envelope-from ) id 1tFzEO-0004tA-Iv; 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pr=C From: Jason Andryuk To: CC: =?utf-8?q?zithro_/_Cyril_R=C3=A9bert?= , "Anthony PERARD" , Andrew Cooper , =?utf-8?q?Marek_Marczykowski-G?= =?utf-8?q?=C3=B3recki?= , Jason Andryuk Subject: [PATCH v2 2/2] tools/xl: add suspend and resume subcommands Date: Tue, 26 Nov 2024 12:19:41 -0500 Message-ID: <20241126171941.170897-3-jason.andryuk@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241126171941.170897-1-jason.andryuk@amd.com> References: <20241126171941.170897-1-jason.andryuk@amd.com> MIME-Version: 1.0 Received-SPF: None (SATLEXMB03.amd.com: jason.andryuk@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF00017096:EE_|CY8PR12MB8411:EE_ X-MS-Office365-Filtering-Correlation-Id: 54c6437b-a83c-43a8-6c5c-08dd0e3e8dbb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|376014|82310400026; X-Microsoft-Antispam-Message-Info: =?utf-8?q?DhJC9YUz+q1LuaymHIpJtsnU+N0Acne?= =?utf-8?q?Yho9Ddv3ZD6INgXYtZKooMYbDvJqUkYnSOK5zj6hHbzl4msi3+Kr+7GCJgCnWx8jv?= =?utf-8?q?DiLMDQEBqSS73T9x1azAgf+fVPD2b4+WpEWCt3QGJx4SskHUp3rzD61yjFR04qU3l?= =?utf-8?q?a/A/O2o1mP7eZdlXGj2BfcTSIHCiJvVF8zqjUoOe3AsrVGypIvWWDuO37l114i2Ap?= =?utf-8?q?GQrFRbx4uO/dG4YRLWhd7PcbGQweWKI8X2G9BxTWmxfXElETQD3P1zwY+c2jA9IIn?= =?utf-8?q?mAQhQlOfdRVASQ3hfvfjRa3ggEwo8Y8L0EVltg4gGkb9fkQOToCw1p5e9Joa2yG1S?= =?utf-8?q?TqCgIhEHDm4hT7ndZc48b+39soBMSdSbhVGSWMsf4cKpb3lRlr1ZzbupFSFL18Dsm?= =?utf-8?q?KCLn5k7WMjHhZeOgRAgKT8D4a6vCI7/ChZ1WzdTreaskQCegekqIFv/mh6SZSULQC?= =?utf-8?q?R4FQgdrgrkS4qiFeK2u1Jh6H05rs+BZLorijwVpgsrZxx3GnR2nl5Qy38VpQluaAz?= =?utf-8?q?OLOdp0cF7fSryssA606/M0Rnra7MmkILEnDk2u27Tk+/nyG7oFPrrI02m7JoYybzv?= =?utf-8?q?A7LvMrCQwoEXe7U3j8Dm+xKeU7PjZjWSIqLOMnT2ZRAX/fbmtlCkO9Ke9H4mf5/ln?= =?utf-8?q?ax24dFYJCuFhWwpJcwco/TcSnpJvd0dSBo4szFkPGf3mUEZx4cafCH0tk1+zDso9V?= =?utf-8?q?Dr5DqJJSXGOFlfINOOEKt6mahWdGax/cAE78+/qTmoquep9SOcnLqxwRl+3w8DdXg?= =?utf-8?q?96GYP7XBKGLRe94kP9+0W1zxThz6xAoXuy84HPS94qcbU9MUBI7U5idAayZxF1/3A?= =?utf-8?q?yyfVF7V3suU37qwRUhTmT+cK/AIAiMOLk4LXYTARy/vEDZwUVApbFQeGUFnXbkTAp?= =?utf-8?q?jQzzeQ0KY72cTMqnYHuRXVEoiQW63BiAyKwRqsbk57sBgsc+LmyZBm6MpmQpDpZnL?= =?utf-8?q?xtbgl3sdCwIz8rWyguBIilWVZZoDSQ0t1z672TJC685rHk2WVbaUSwaqWhup+o/2w?= =?utf-8?q?Kcb5NInUCggv7Um3hDUbjAAHYnabV5Wk1mCmwQQlA7wbUELRpw1cPZh5sijnhRU/I?= =?utf-8?q?9kQepvg492+eLyWSWNBNSut9xQglu+LjGIPajuPaCzEYwWOVe/53dZA7N72tD2Adr?= =?utf-8?q?VzhIyxg0nQstSe4uBvuQusl03rJysJaL+Q+QbCoVLKS0hbjJpbkAvCbw9s9YITa5G?= =?utf-8?q?LL6lbir+xaBT0vJWU4AJ6n3Y+EDHQLOtdHkzQM77BsK6WlhC72VkLsDk7LSAAVgjC?= =?utf-8?q?DfaTe+PZ7iniOqgV0CA1/Umi1SXXbL50qIwVJ6w9qm1myQVvUMuaM/Ul9Vz4ztmDT?= =?utf-8?q?1or9M5K1K/Ox8mexXCgv0NY6Lp0kF939FClLeYLQfdn7sfwjf4oUi5NjbLgu5Ty/Q?= =?utf-8?q?A7icNlNUVGn?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(1800799024)(36860700013)(376014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Nov 2024 17:19:58.4016 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 54c6437b-a83c-43a8-6c5c-08dd0e3e8dbb X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF00017096.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB8411 From: zithro / Cyril Rébert The xl command doesn't provide suspend/resume, so add them : xl suspend xl resume This patch follows a discussion on XenDevel: when you want the virtualized equivalent of "sleep"-ing a host, it's better to suspend/resume than to pause/unpause a domain. Suggested-by: Andrew Cooper Suggested-by: Marek Marczykowski-Górecki Signed-off-by: Cyril Rébert (zithro) Signed-off-by: Jason Andryuk --- Rename command to just "suspend" Move inside the HAVE_NO_SUSPEND_RESUME --- docs/man/xl.1.pod.in | 12 ++++++++++++ tools/xl/xl.h | 2 ++ tools/xl/xl_cmdtable.c | 10 ++++++++++ tools/xl/xl_vmcontrol.c | 36 ++++++++++++++++++++++++++++++++++++ 4 files changed, 60 insertions(+) diff --git a/docs/man/xl.1.pod.in b/docs/man/xl.1.pod.in index bed8393473..fe38724b2b 100644 --- a/docs/man/xl.1.pod.in +++ b/docs/man/xl.1.pod.in @@ -682,6 +682,10 @@ Pass the VNC password to vncviewer via stdin. =back +=item B I + +Resume a domain, after having been suspended. + =item B [I] I I [I] Saves a running domain to a state file so that it can be restored @@ -760,6 +764,14 @@ in response to this event. =back +=item B I + +Suspend a domain. This is a cooperative operation where the domain must +respond to the xenstore trigger. When in a suspended state the domain +still consumes allocated resources (such as memory), but is not eligible +for scheduling by the Xen hypervisor. It is in a shutdown state, but +not dying. + =item B I I Send a to the domain, each type of request is diff --git a/tools/xl/xl.h b/tools/xl/xl.h index 967d034cfe..45745f0dbb 100644 --- a/tools/xl/xl.h +++ b/tools/xl/xl.h @@ -129,6 +129,8 @@ int main_restore(int argc, char **argv); int main_migrate_receive(int argc, char **argv); int main_save(int argc, char **argv); int main_migrate(int argc, char **argv); +int main_suspend(int argc, char **argv); +int main_resume(int argc, char **argv); #endif int main_dump_core(int argc, char **argv); int main_pause(int argc, char **argv); diff --git a/tools/xl/xl_cmdtable.c b/tools/xl/xl_cmdtable.c index 53fc22d344..06a0039718 100644 --- a/tools/xl/xl_cmdtable.c +++ b/tools/xl/xl_cmdtable.c @@ -193,6 +193,16 @@ const struct cmd_spec cmd_table[] = { "Restore a domain from a saved state", "- for internal use only", }, + { "suspend", + &main_suspend, 0, 1, + "Suspend a domain to RAM", + "", + }, + { "resume", + &main_resume, 0, 1, + "Resume a domain from RAM", + "", + }, #endif { "dump-core", &main_dump_core, 0, 1, diff --git a/tools/xl/xl_vmcontrol.c b/tools/xl/xl_vmcontrol.c index c45d497c28..3160966972 100644 --- a/tools/xl/xl_vmcontrol.c +++ b/tools/xl/xl_vmcontrol.c @@ -42,6 +42,16 @@ static void unpause_domain(uint32_t domid) libxl_domain_unpause(ctx, domid, NULL); } +static void suspend_domain(uint32_t domid) +{ + libxl_domain_suspend_only(ctx, domid, NULL); +} + +static void resume_domain(uint32_t domid) +{ + libxl_domain_resume(ctx, domid, 1, NULL); +} + static void destroy_domain(uint32_t domid, int force) { int rc; @@ -82,6 +92,32 @@ int main_unpause(int argc, char **argv) return EXIT_SUCCESS; } +int main_suspend(int argc, char **argv) +{ + int opt; + + SWITCH_FOREACH_OPT(opt, "", NULL, "suspend", 1) { + /* No options */ + } + + suspend_domain(find_domain(argv[optind])); + + return EXIT_SUCCESS; +} + +int main_resume(int argc, char **argv) +{ + int opt; + + SWITCH_FOREACH_OPT(opt, "", NULL, "resume", 1) { + /* No options */ + } + + resume_domain(find_domain(argv[optind])); + + return EXIT_SUCCESS; +} + int main_destroy(int argc, char **argv) { int opt;