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| author | Xin Hao <xhao@linux.alibaba.com> | 2021-11-05 23:48:07 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 23:30:46 +0300 |
| commit | b5ca3e83ddb05342b1b30700b999cb9b107511f6 (patch) | |
| tree | ad0e7fc87f2bad35fcc949426c996975cc8e6dab /Kconfig | |
| parent | a460a36034bad4403c2c62e04a521bc6987ae5db (diff) | |
| download | linux-b5ca3e83ddb05342b1b30700b999cb9b107511f6.tar.xz | |
mm/damon/dbgfs: add adaptive_targets list check before enable monitor_on
When the ctx->adaptive_targets list is empty, I did some test on
monitor_on interface like this.
# cat /sys/kernel/debug/damon/target_ids
#
# echo on > /sys/kernel/debug/damon/monitor_on
# damon: kdamond (5390) starts
Though the ctx->adaptive_targets list is empty, but the kthread_run
still be called, and the kdamond.x thread still be created, this is
meaningless.
So there adds a judgment in 'dbgfs_monitor_on_write', if the
ctx->adaptive_targets list is empty, return -EINVAL.
Link: https://lkml.kernel.org/r/0a60a6e8ec9d71989e0848a4dc3311996ca3b5d4.1634720326.git.xhao@linux.alibaba.com
Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions