]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
zram: remove max_comp_streams internals
authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Fri, 20 May 2016 23:59:59 +0000 (16:59 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 21 May 2016 00:58:30 +0000 (17:58 -0700)
commit43209ea2d17aae1540d4e28274e36404f72702f2
treebe21fbbabf6fabeb3e1dd4ca2c0684f238458c55
parentd34f615720d17c49b6779f6fcd5cb7eb82231a38
zram: remove max_comp_streams internals

Remove the internal part of max_comp_streams interface, since we
switched to per-cpu streams.  We will keep RW max_comp_streams attr
around, because:

a) we may (silently) switch back to idle compression streams list and
   don't want to disturb user space

b) max_comp_streams attr must wait for the next 'lay off cycle'; we
   give user space 2 years to adjust before we remove/downgrade the attr,
   and there are already several attrs scheduled for removal in 4.11, so
   it's too late for max_comp_streams.

This slightly change a user visible behaviour:

- First, reading from max_comp_stream file now will always return the
  number of online CPUs.

- Second, writing to max_comp_stream will not take any effect.

Link: http://lkml.kernel.org/r/20160503165546.25201-1-sergey.senozhatsky@gmail.com
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/blockdev/zram.txt
drivers/block/zram/zcomp.c
drivers/block/zram/zram_drv.c
drivers/block/zram/zram_drv.h