** Package changed: linux-meta (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1236607
Title: cifs.ko should default to CIFSMaxBufSize=65535 Status in “linux” package in Ubuntu: New Bug description: Win 7 and other clients can handle a CIFS max buffer size of 64k, and default to this value when talking to Windows or Linux SMB servers. The practical effect of this is drag-drop file operations in Windows can run at near gigabit speeds (80-90mb/s over a gigabit LAN) even when talking to a Linux Samba server. The 'cifs' filesystem on the other hand struggles to achieve this by default because it's buffer size is constrained to just 16k. Boosting the buffer size with a modprobe.d options file like so: options cifs CIFSMaxBufSize=65536 or even: options cifs CIFSMaxBufSize=130048 produces a speed up in file operations (as measured with rsync -W between two mountpoints, or dd | pv | dd) which is on par with the speed achieved by Windows - taking cifs from averaging 40-50 mb/s on my machine, to the 80-90 mb/s the same machine running Windows (and talking to a Linux samba server) can achieve. There doesn't seem to be any real downside to this in the common desktop use case in the modern age (memory is not a constraint), so shipping a modprobe.d cifs.conf file seems like a sensible way to close the perceived gap in user experience. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1236607/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
