From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 27 May 2021 09:22:08 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1lmALI-0003CG-6k for lore@lore.pengutronix.de; Thu, 27 May 2021 09:22:08 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lmALH-0006Cw-4j for lore@pengutronix.de; Thu, 27 May 2021 09:22:08 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:From:In-Reply-To:MIME-Version: References:Message-ID:Subject:Cc:To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=TJqLilQ7Wdq3vBy8PgvnXDj8tMtnwWbCDDs2lfy4ixE=; b=ewyAj9A7lV3neGwt9b9O+cw9rT OUwltiynhJjK6wDT3ILP7sk3FiF5NM+FGLFxLmpwBkjMMVt/XOckM9boITDU6FjS7ktdLF4vi9AhI QERRD6pZ45CVQD+8y/Bh2NEaun+i12/lMEpIZi1Tcj4U3fICykrkbsxkQHCcqIuLeqhrxf+jVMfrH PtGudYRRYGO+y6PbF9IIPvmFY6er4Ta+9skCG0ilOzWsMoSm1FzbtGL80cySRORFf/ZTrGuG8F7na iMNQPl/53XRpSfkRDapNupM1ME7aUKchB3KAF0D8+EK4ZeLYQrj6crKyhAD5uufOIcHYMxwlR6sAH qfPNcSrQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lmAJw-003JVT-8x; Thu, 27 May 2021 07:20:44 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lmAJr-003JTx-7Z for barebox@lists.infradead.org; Thu, 27 May 2021 07:20:40 +0000 Received: from ptx.hi.pengutronix.de ([2001:67c:670:100:1d::c0]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lmAJp-0005vL-2p; Thu, 27 May 2021 09:20:37 +0200 Received: from sha by ptx.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1lmAJo-0007Be-Pg; Thu, 27 May 2021 09:20:36 +0200 Date: Thu, 27 May 2021 09:20:36 +0200 To: Uwe =?iso-8859-15?Q?Kleine-K=F6nig?= Cc: barebox@lists.infradead.org Message-ID: <20210527072036.GE19819@pengutronix.de> References: <20210526094448.977342-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210526094448.977342-1-u.kleine-koenig@pengutronix.de> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-IRC: #ptxdist @freenode X-Accept-Language: de,en X-Accept-Content-Type: text/plain X-Uptime: 09:18:40 up 98 days, 10:42, 110 users, load average: 0.11, 0.13, 0.16 User-Agent: Mutt/1.10.1 (2018-07-13) From: Sascha Hauer X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210527_002039_296063_428CF98B X-CRM114-Status: GOOD ( 24.70 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.2 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: [PATCH] fs: nfs: Decrease NFS timeout X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) Hi Uwe, On Wed, May 26, 2021 at 11:44:48AM +0200, Uwe Kleine-K=F6nig wrote: > On a customer site we're experience a bit over 1% UDP packet loss. When > wiresharking an NFS transfer of a kernel image (with the goal to boot > via NFS) I saw 64 of 2555 RPC calls staying unanswered. With the current > timeout setting each of them introduces a delay of 2 seconds and the > whole transfer takes 137s. With the timeout reduced to 0.1s the transfer > time is not optimal (going down to approx 15 seconds) but at least it > becomes bearable. > = > Signed-off-by: Uwe Kleine-K=F6nig > --- > fs/nfs.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > = > diff --git a/fs/nfs.c b/fs/nfs.c > index 1130632eb3eb..1ff81a5ee1bf 100644 > --- a/fs/nfs.c > +++ b/fs/nfs.c > @@ -119,7 +119,7 @@ struct rpc_reply { > uint32_t data[0]; > }; > = > -#define NFS_TIMEOUT (2 * SECOND) > +#define NFS_TIMEOUT (100 * MSECOND) > #define NFS_MAX_RESEND 5 Should we increase NFS_MAX_RESEND at the same time? Otherwise we timeout after 500ms which doesn't seem much to me on some network hickups. Sascha -- = Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox