Commit 6e52f462 authored by SeongJae Park's avatar SeongJae Park Committed by ZhangPeng
Browse files

Docs/admin-guide/mm/damon/usage: fix wrong example of DAMOS filter matching sysfs file 

stable inclusion
from stable-v6.6.32
commit fe4549b1d6aca7cffb4ab5010f7918263a6b1058
bugzilla: https://gitee.com/openeuler/kernel/issues/IA4MGD

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=fe4549b1d6aca7cffb4ab5010f7918263a6b1058

--------------------------------

commit da2a061888883e067e8e649d086df35c92c760a7 upstream.

The example usage of DAMOS filter sysfs files, specifically the part of
'matching' file writing for memcg type filter, is wrong.  The intention is
to exclude pages of a memcg that already getting enough care from a given
scheme, but the example is setting the filter to apply the scheme to only
the pages of the memcg.  Fix it.

Link: https://lkml.kernel.org/r/20240503180318.72798-7-sj@kernel.org
Fixes: 9b7f9322 ("Docs/admin-guide/mm/damon/usage: document DAMOS filters of sysfs")
Closes: https://lore.kernel.org/r/20240317191358.97578-1-sj@kernel.org


Signed-off-by: default avatarSeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>	[6.3.x]
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarZhangPeng <zhangpeng362@huawei.com>
parent dafb16d3

Documentation/admin-guide/mm/damon/usage.rst

+1 −1
Original line number Diff line number Diff line
@@ -389,7 +389,7 @@ pages of all memory cgroups except ``/having_care_already``.:: 
    # # further filter out all cgroups except one at '/having_care_already'

    echo memcg > 1/type

    echo /having_care_already > 1/memcg_path

    echo N > 1/matching

    echo Y > 1/matching



Note that ``anon`` and ``memcg`` filters are currently supported only when

``paddr`` `implementation <sysfs_contexts>` is being used.