> On 2 Jan 2018, at 9:06 PM, Vasya Pupkin <1740...@bugs.launchpad.net> wrote:
>
>> Apparently the original patch didn’t send for linux stable branch.
>
> I don't know exactly what you mean, but 4.14 kernel has this patch. It's
> easy to verify by changed messages ("enabling ssd optimizations" vs
> "enabling SSD mode”).
It doesn’t have “Cc: sta...@vger.kernel.org <mailto:sta...@vger.kernel.org>”.
Generally important fixes will also send to the stable mailing list, so Linux
stable (4.4, 4.9 and 4.14 in this context) can pull it in.
>
>> can you ask the patch author and BTRFS maintainers
>
> I'm not sure how to ask BTRFS maintainers and why I would do so, because
> patch description suggests that it should be backported and has notes
> about it:
>
> Backporting notes
>
> Notes for whoever wants to backport this patch to their 4.9 LTS kernel:
> * First apply commit 951e796 "btrfs: drop the nossd flag when
> remounting with -o ssd", or fixup the differences manually.
> * The rest of the conflicts are because of the fs_info refactoring. So,
> for example, instead of using fs_info, it's root->fs_info in
> extent-tree.c
I am not a native english speaker, but from what I can understand, it’s
more like a caveat instead of a recommendation.
>
> --
> You received this bug notification because you are subscribed to linux
> in Ubuntu.
> https://bugs.launchpad.net/bugs/1740143
>
> Title:
> backport btrfs ssd mount option fix
>
> Status in linux package in Ubuntu:
> Confirmed
>
> Bug description:
> Hello,
>
> It appears that all kernels before 4.14 had a problem with btrfs ssd
> mount option. According to
> https://btrfs.wiki.kernel.org/index.php/Gotchas#ssd_mount_option, it
> has a negative impact on usability and lifetime of modern SSDs. Since
> it is enabled by default when SSD is detected, it affects all systems
> with SSD drives. Please backport this commit to normal and HWE
> kernels:
>
> https://github.com/torvalds/linux/commit/583b723151794e2ff1691f1510b4e43710293875
>
> ProblemType: Bug
> DistroRelease: Ubuntu 16.04
> Package: linux-image-generic 4.4.0.104.109
> ProcVersionSignature: Ubuntu 4.4.0-104.127-generic 4.4.98
> Uname: Linux 4.4.0-104-generic x86_64
> AlsaDevices:
> total 0
> crw-rw---- 1 root audio 116, 1 дек 17 10:50 seq
> crw-rw---- 1 root audio 116, 33 дек 17 10:50 timer
> AlsaVersion: Advanced Linux Sound Architecture Driver Version
> k4.4.0-104-generic.
> AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
> ApportVersion: 2.20.1-0ubuntu2.14
> Architecture: amd64
> ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
> AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
> '/dev/snd/timer'] failed with exit code 1:
> CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read
> kernel buffer failed: Operation not permitted
> Date: Tue Dec 26 18:57:10 2017
> InstallationDate: Installed on 2011-04-14 (2448 days ago)
> InstallationMedia: Ubuntu-Server 10.04.2 LTS "Lucid Lynx" - Release amd64
> (20110211.1)
> MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
> PciMultimedia:
>
> ProcFB: 0 nouveaufb
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-104-generic
> root=UUID=c7605446-0bf3-11e7-bfa0-f91abd974ce1 ro quiet bootdegraded=true
> RelatedPackageVersions:
> linux-restricted-modules-4.4.0-104-generic N/A
> linux-backports-modules-4.4.0-104-generic N/A
> linux-firmware 1.157.14
> RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
> SourcePackage: linux
> UpgradeStatus: Upgraded to xenial on 2016-07-30 (513 days ago)
> WifiSyslog:
>
> dmi.bios.date: 02/20/2008
> dmi.bios.vendor: American Megatrends Inc.
> dmi.bios.version: P1.40
> dmi.board.name: 4Core1333-eSATA2.
> dmi.chassis.asset.tag: To Be Filled By O.E.M.
> dmi.chassis.type: 3
> dmi.chassis.vendor: To Be Filled By O.E.M.
> dmi.chassis.version: To Be Filled By O.E.M.
> dmi.modalias:
> dmi:bvnAmericanMegatrendsInc.:bvrP1.40:bd02/20/2008:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvn:rn4Core1333-eSATA2.:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
> dmi.product.name: To Be Filled By O.E.M.
> dmi.product.version: To Be Filled By O.E.M.
> dmi.sys.vendor: To Be Filled By O.E.M.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1740143/+subscriptions
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https://bugs.launchpad.net/bugs/1740143
Title:
backport btrfs ssd mount option fix
To manage notifications about this bug go to:
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