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[107.215.223.229]) by smtp.gmail.com with ESMTPSA id y20-20020a4a6254000000b0047f89d8c7ebsm4780899oog.46.2022.10.17.16.27.12 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 17 Oct 2022 16:27:13 -0700 (PDT) Content-Type: text/plain; charset=us-ascii List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3696.120.41.1.1\)) Subject: Re: VFS mount rollback for virtio 9pfs From: Bakul Shah In-Reply-To: Date: Mon, 17 Oct 2022 16:27:12 -0700 Cc: Daniel O'Connor , Felix Palmen , freebsd-hackers@freebsd.org Content-Transfer-Encoding: 7bit Message-Id: <2338B575-4804-4D2D-A4EF-9D234D71481A@iitbombay.org> References: <75ACE8B8-A41F-4742-95DA-3CFB3B97746A@dons.net.au> <20220714101214.sju2rpsngqjyuvsb@nexus.home.palmen-it.de> <20220715131656.f2epy732npgbgrf5@nexus.home.palmen-it.de> <20220715151509.d2v6kqkjsnrxtprj@nexus.home.palmen-it.de> <45451C7B-7A12-420F-B6B0-19F2FA98D056@dons.net.au> <20220718065304.cx2o24tshzgpxmqw@nexus.home.palmen-it.de> <3E450927-1932-412E-A568-A2F84582BD26@dons.net.au> <0C98D486-6A8F-4DF6-8AFF-F3B84E631A84@iitbombay.org> To: Navdeep Parhar X-Mailer: Apple Mail (2.3696.120.41.1.1) X-Rspamd-Queue-Id: 4MrtSM2grLz4N1D X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=iitbombay-org.20210112.gappssmtp.com header.s=20210112 header.b=oFs50UkD; dmarc=none; spf=pass (mx1.freebsd.org: domain of bakul@iitbombay.org designates 2001:4860:4864:20::32 as permitted sender) smtp.mailfrom=bakul@iitbombay.org X-Spamd-Result: default: False [-3.00 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; MV_CASE(0.50)[]; R_DKIM_ALLOW(-0.20)[iitbombay-org.20210112.gappssmtp.com:s=20210112]; R_SPF_ALLOW(-0.20)[+ip6:2001:4860:4000::/36]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2001:4860:4864:20::32:from]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[iitbombay-org.20210112.gappssmtp.com:+]; MIME_TRACE(0.00)[0:+]; MLMMJ_DEST(0.00)[freebsd-hackers@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ASN(0.00)[asn:15169, ipnet:2001:4860:4864::/48, country:US]; FROM_HAS_DN(0.00)[]; FREEFALL_USER(0.00)[bakul]; ARC_NA(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCPT_COUNT_THREE(0.00)[4]; DMARC_NA(0.00)[iitbombay.org]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Oct 17, 2022, at 4:07 PM, Navdeep Parhar wrote: > > This is what I have in the VM's /etc/fstab: > src /usr/src virtfs trans=virtio,ro,late 0 0 > obj /usr/obj virtfs trans=virtio,ro,late 0 0 Thanks for listing this as it made me realize my mistake! I typed "-t virtio" and was too tired to notice I should've used "-t virtfs" with mount. Daniel's code works fine! # mount -t virtfs -o trans=virtio sharename /mnt $ dd < largefile > /dev/null bs=1m count=1000 1000+0 records in 1000+0 records out 1048576000 bytes transferred in 6.566231 secs (159692211 bytes/sec)