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Fri, 30 Jul 2021 12:26:58 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap1.suse-dmz.suse.de with ESMTPSA id kDLaJhLwA2FOVgAAGKfGzw (envelope-from ); Fri, 30 Jul 2021 12:26:58 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 6f6e3d8e-f131-11eb-98a9-12813bfff9fa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1627648018; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aVgd7I4DSuetcgd/27P69oOnpKyUEJbbUJKDnpuahN4=; b=i6Je2YxDCN0NlWmH4d5F/fOp5+FORTrNZWQMvEhT+aUPXWHYIKZlvYaLQMFfYKWKrWh1UI e/ZCDiVBuPF9GgO78bnrLroXVXM3g1N5lgjTUaDGqPO/soc0y93/uCSWaJR5jRFs1OmmKq ojE83M/GRr85xO4Q8AcVsmHXD4xU9Xc= From: Juergen Gross To: xen-devel@lists.xenproject.org Cc: julien@xen.org, Juergen Gross , Ian Jackson , Wei Liu Subject: [PATCH v3 2/2] tools/xenstore: set open file descriptor limit for xenstored Date: Fri, 30 Jul 2021 14:26:43 +0200 Message-Id: <20210730122643.2043-3-jgross@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210730122643.2043-1-jgross@suse.com> References: <20210730122643.2043-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1627648048030100001 Content-Type: text/plain; charset="utf-8" Add a configuration item for the maximum number of domains xenstored should support and set the limit of open file descriptors accordingly. For HVM domains there are up to 5 socket connections per domain (2 by the xl daemon process, and 3 by qemu). So set the ulimit for xenstored to 5 * XENSTORED_MAX_DOMAINS + 100 (the "+ 100" is for some headroom, like logging, event channel device, etc.). Signed-off-by: Juergen Gross --- V2: - set ulimit form launch script (Julien Grall) - split off from original patch (Julien Grall) --- tools/hotplug/Linux/init.d/sysconfig.xencommons.in | 7 +++++++ tools/hotplug/Linux/launch-xenstore.in | 3 +++ 2 files changed, 10 insertions(+) diff --git a/tools/hotplug/Linux/init.d/sysconfig.xencommons.in b/tools/hot= plug/Linux/init.d/sysconfig.xencommons.in index 5ad4fe0818..2b682415f4 100644 --- a/tools/hotplug/Linux/init.d/sysconfig.xencommons.in +++ b/tools/hotplug/Linux/init.d/sysconfig.xencommons.in @@ -32,6 +32,13 @@ # Changing this requires a reboot to take effect. #XENSTORED=3D@XENSTORED@ =20 +## Type: integer +## Default: 32768 +# +# Select maximum number of domains supported by xenstored. +# Only evaluated if XENSTORETYPE is "daemon". +#XENSTORED_MAX_N_DOMAINS=3D32768 + ## Type: string ## Default: "" # diff --git a/tools/hotplug/Linux/launch-xenstore.in b/tools/hotplug/Linux/l= aunch-xenstore.in index 1747c96065..3f8b33dd32 100644 --- a/tools/hotplug/Linux/launch-xenstore.in +++ b/tools/hotplug/Linux/launch-xenstore.in @@ -54,6 +54,7 @@ test -f @CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons && . @C= ONFIG_DIR@/@CONFIG_LEAF =20 [ "$XENSTORETYPE" =3D "daemon" ] && { [ -z "$XENSTORED_TRACE" ] || XENSTORED_ARGS=3D"$XENSTORED_ARGS -T @XEN_LO= G_DIR@/xenstored-trace.log" + [ -z "$XENSTORED_MAX_N_DOMAINS" ] && XENSTORED_MAX_N_DOMAINS=3D32768 [ -z "$XENSTORED" ] && XENSTORED=3D@XENSTORED@ [ -x "$XENSTORED" ] || { echo "No xenstored found" @@ -63,6 +64,7 @@ test -f @CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons && . @C= ONFIG_DIR@/@CONFIG_LEAF XS_OOM_SCORE=3D-$(($XENSTORED_OOM_MEM_THRESHOLD * 10)) =20 rm -f @XEN_RUN_DIR@/xenstored.pid + N_FILES=3D$(($XENSTORED_MAX_N_DOMAINS * 5 + 100)) =20 echo -n Starting $XENSTORED... $XENSTORED --pid-file @XEN_RUN_DIR@/xenstored.pid $XENSTORED_ARGS @@ -70,6 +72,7 @@ test -f @CONFIG_DIR@/@CONFIG_LEAF_DIR@/xencommons && . @C= ONFIG_DIR@/@CONFIG_LEAF systemd-notify --booted 2>/dev/null || timeout_xenstore $XENSTORED || exi= t 1 XS_PID=3D`cat @XEN_RUN_DIR@/xenstored.pid` echo $XS_OOM_SCORE >/proc/$XS_PID/oom_score_adj + prlimit --pid $XS_PID --nofile=3D$N_FILES =20 exit 0 } --=20 2.26.2