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AJvYcCVUDaAEz+WWnoIxqzewfouQhBxgqhTc1I1xtzecS8xFtAe6K+25HaWn9cEFFKZHCNngVlyU7g==@lists.linux.dev, AJvYcCXBoCfZxQEZkQ+e0gUYrPTe0VePnR062Q7NxPTKeRJTCaxn/XW1lCNzjrSfgtOKOuRLNhWatA==@lists.linux.dev X-Gm-Message-State: AOJu0Yz3VsbVBRxMXCHQl8zfbTjNGN8MSJSb5TnncowTFXFPQyoHtElW G9GSfLo6sJpnuXlNTSO7Ooc2Kd5c1AfHHmq6LCMkVzM+eDtBQkgx X-Google-Smtp-Source: AGHT+IHPhZrggldPhDzAISSCt7hDQP+r1zqFPPuYtS+By/R474KzhLZIXK5fLtO4N5rEH3YS+YNQYw== X-Received: by 2002:a17:902:ecc2:b0:207:3fd0:13ec with SMTP id d9443c01a7336-208d836cef7mr234528045ad.17.1727117002177; Mon, 23 Sep 2024 11:43:22 -0700 (PDT) Received: from [192.168.0.235] ([38.34.87.7]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20794601008sm135317725ad.81.2024.09.23.11.43.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Sep 2024 11:43:21 -0700 (PDT) Message-ID: <670794146059f85a30efd7cf9d6650375d987077.camel@gmail.com> Subject: Re: [PATCH v2 19/25] netfs: Speed up buffered reading From: Eduard Zingerman To: Manu Bretelle , dhowells@redhat.com Cc: asmadeus@codewreck.org, ceph-devel@vger.kernel.org, christian@brauner.io, ericvh@kernel.org, hsiangkao@linux.alibaba.com, idryomov@gmail.com, jlayton@kernel.org, linux-afs@lists.infradead.org, linux-cifs@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, marc.dionne@auristor.com, netdev@vger.kernel.org, netfs@lists.linux.dev, pc@manguebit.com, smfrench@gmail.com, sprasad@microsoft.com, tom@talpey.com, v9fs@lists.linux.dev, willy@infradead.org Date: Mon, 23 Sep 2024 11:43:16 -0700 In-Reply-To: <20240923183432.1876750-1-chantr4@gmail.com> References: <20240814203850.2240469-20-dhowells@redhat.com> <20240923183432.1876750-1-chantr4@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.4 (3.52.4-1.fc40) Precedence: bulk X-Mailing-List: netfs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2024-09-23 at 11:34 -0700, Manu Bretelle wrote: [...] > The qemu command invoked by vmtest is: >=20 > qemu-system-x86_64 "-nodefaults" "-display" "none" "-serial" "mon:stdio" = \ > "-enable-kvm" "-cpu" "host" "-qmp" "unix:/tmp/qmp-971717.sock,server=3D= on,wait=3Doff" \ > "-chardev" "socket,path=3D/tmp/qga-888301.sock,server=3Don,wait=3Doff,i= d=3Dqga0" \ > "-device" "virtio-serial" \ > "-device" "virtserialport,chardev=3Dqga0,name=3Dorg.qemu.guest_agent.0"= \ > "--device" "virtio-serial" \ > "-chardev" "socket,path=3D/tmp/cmdout-508724.sock,server=3Don,wait=3Dof= f,id=3Dcmdout" \ > "--device" "virtserialport,chardev=3Dcmdout,name=3Dorg.qemu.virtio_seri= al.0" \ > "-virtfs" "local,id=3Droot,path=3D/,mount_tag=3D/dev/root,security_mode= l=3Dnone,multidevs=3Dremap" \ > "-kernel" "/data/users/chantra/linux/arch/x86/boot/bzImage" \ > "-no-reboot" "-append" "rootfstype=3D9p rootflags=3Dtrans=3Dvirtio,cach= e=3Dmmap,msize=3D1048576 rw earlyprintk=3Dserial,0,115200 printk.devkmsg=3D= on console=3D0,115200 loglevel=3D7 raid=3Dnoautodetect init=3D/tmp/vmtest-i= nit4PdCA.sh panic=3D-1" \ > "-virtfs" "local,id=3Dshared,path=3D/data/users/chantra/linux,mount_tag= =3Dvmtest-shared,security_model=3Dnone,multidevs=3Dremap" \ > "-smp" "2" "-m" "4G" fwiw: removing "cache=3Dmmap" from "rootflags" allows VM to boot and run te= sts.