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authorSeongJae Park <sj@kernel.org>2024-06-18 20:18:00 +0200
committerAndrew Morton <akpm@linux-foundation.org>2024-07-04 04:30:13 +0200
commit83dc7bbaecae6e69e338355e9a137f0e7a0ecc40 (patch)
tree741ef88b8aff42d144893d9d490c015d98e67af6 /mm/damon
parentmm/damon/core: implement DAMON context commit function (diff)
downloadlinux-83dc7bbaecae6e69e338355e9a137f0e7a0ecc40.tar.xz
linux-83dc7bbaecae6e69e338355e9a137f0e7a0ecc40.zip
mm/damon/sysfs: use damon_commit_ctx()
DAMON_SYSFS manually manipulates DAMON context structs for online parameters update. Since the struct contains not only input parameters but also internal status and operation results, it is not that simple. Indeed, we found and fixed a few bugs in the code. Now DAMON core layer provides a function for the usage, namely damon_commit_ctx(). Replace the manual manipulation logic with the function. The core layer function could have its own bugs, but this change removes a source of bugs. Link: https://lkml.kernel.org/r/20240618181809.82078-4-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon')
-rw-r--r--mm/damon/sysfs.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 6fee383bc0c5..0f9fe18beb40 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -1345,6 +1345,9 @@ static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,
return damon_sysfs_set_schemes(ctx, sys_ctx->schemes);
}
+static struct damon_ctx *damon_sysfs_build_ctx(
+ struct damon_sysfs_context *sys_ctx);
+
/*
* damon_sysfs_commit_input() - Commit user inputs to a running kdamond.
* @kdamond: The kobject wrapper for the associated kdamond.
@@ -1353,14 +1356,22 @@ static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,
*/
static int damon_sysfs_commit_input(struct damon_sysfs_kdamond *kdamond)
{
+ struct damon_ctx *param_ctx;
+ int err;
+
if (!damon_sysfs_kdamond_running(kdamond))
return -EINVAL;
/* TODO: Support multiple contexts per kdamond */
if (kdamond->contexts->nr != 1)
return -EINVAL;
- return damon_sysfs_apply_inputs(kdamond->damon_ctx,
- kdamond->contexts->contexts_arr[0]);
+ param_ctx = damon_sysfs_build_ctx(kdamond->contexts->contexts_arr[0]);
+ if (IS_ERR(param_ctx))
+ return PTR_ERR(param_ctx);
+ err = damon_commit_ctx(kdamond->damon_ctx, param_ctx);
+ damon_sysfs_destroy_targets(param_ctx);
+ damon_destroy_ctx(param_ctx);
+ return err;
}
static int damon_sysfs_commit_schemes_quota_goals(