On Sun, 1 Dec 2019, Eddie Chapman wrote: > On 01/12/2019 08:45, Coly Li wrote: > > On 2019/12/1 6:34 上午, Eric Wheeler wrote: > > > Hi Coly, > > > > > > We use 4.19.y and there have been many performance and stability changes > > > since then. I'm considering backporting the 5.4 version into 4.19 and > > > wondered: > > > > > > Are there any changes in bcache between 4.19 and 5.4 that depend on new > > > features elsewhere in the kernel, or should I basically be able to copy > > > the tree from 5.4 to 4.19 and fix minor compilation issues? > > > > > > Can you think of any issues that would arise from such a backport? > > > > Hi Eric, > > > > It should be OK to backport bcache patches from 5.4 to 4.19. I did > > similar thing for SUSE Enterprise kernel which were based on Linux 4.12 > > code base, and the changes was tiny. > > > > If you encounter problem during the backport, you may post the .rej file > > and maybe I can help. > > Hi Eric, Coly, > > I have been applying the list below to kernel.org 4.19.x latest stable and > using it on several production machines without any issues for months apart > from the newer ones of course. Apart from the odd context adjust I don't > think any needed any modifying. My list used to be much bigger but a lot has > been backported already in 4.19.x stable so my list has gone down quite a lot > :-) Thanks Coly and Eddie for the feedback. I just booted the patched 4.19.86 kernel, will let you know if I notice any issues. -- Eric Wheeler > > Sorry I don't use git but if I run in my patches directory as it is currently > the list is: > > egrep '^Subject' *.patch > > 00a.patch:Subject: bcache: account size of buckets used in uuid write to > 00b.patch:Subject: bcache: fix typo in code comments of > closure_return_with_destructor() > 00c.patch:Subject: bcache: recal cached_dev_sectors on detach > 01.patch:Subject: bcache: remove unused bch_passthrough_cache > 02.patch:Subject: bcache: remove useless parameter of bch_debug_init() > 03.patch:Subject: bcache: use MAX_CACHES_PER_SET instead of magic number 8 in > 05.patch:Subject: bcache: do not check if debug dentry is ERR or NULL > explicitly on > 06.patch:Subject: bcache: do not mark writeback_running too early > 07.patch:Subject: bcache: cannot set writeback_running via sysfs if no > writeback > 08.patch:Subject: bcache: introduce force_wake_up_gc() > 09.patch:Subject: bcache: not use hard coded memset size in > 11.patch:Subject: bcache: fix input integer overflow of congested threshold > 13.patch:Subject: bcache: add sysfs_strtoul_bool() for setting bit-field > variables > 14.patch:Subject: bcache: use sysfs_strtoul_bool() to set bit-field variables > 15.patch:Subject: bcache: fix input overflow to writeback_delay > 17.patch:Subject: bcache: fix input overflow to journal_delay_ms > 18.patch:Subject: bcache: fix input overflow to cache set io_error_limit > 20.patch:Subject: bcache: fix crashes stopping bcache device before read miss > done > 22.patch:Subject: bcache: fix inaccurate result of unused buckets > 24.patch:Subject: bcache: add error check for calling register_bdev() > 26.patch:Subject: bcache: improve bcache_reboot() > 28.patch:Subject: bcache: fix wrong usage use-after-freed on keylist in > out_nocoalesce > 30.patch:Subject: [PATCH 07/12] bcache: fix deadlock in bcache_allocator > >
