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mm/damon: remove damon_callback->before_damos_apply

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The hook was introduced to let DAMON kernel API users access DAMOS
schemes-eligible regions in a safe way.  Now it is no more used by anyone,
and the functionality is provided in a better way by damos_walk().  Remove
it.

Link: https://lkml.kernel.org/r/20250306175908.66300-13-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2025-03-06 09:59:07 -08:00 committed by Andrew Morton
parent cedee98f68
commit 99ce7c9c6d
2 changed files with 4 additions and 14 deletions
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5
include/linux/damon.h
View File

@ -605,7 +605,6 @@ struct damon_operations {
*
* @after_wmarks_check: Called after each schemes' watermarks check.
* @after_aggregation: Called after each aggregation.
* @before_damos_apply: Called before applying DAMOS action.
* @before_terminate: Called before terminating the monitoring.
*
* The monitoring thread (&damon_ctx.kdamond) calls @before_terminate just
@ -626,10 +625,6 @@ struct damon_operations {
struct damon_callback {
int (*after_wmarks_check)(struct damon_ctx *context);
int (*after_aggregation)(struct damon_ctx *context);
int (*before_damos_apply)(struct damon_ctx *context,
struct damon_target *target,
struct damon_region *region,
struct damos *scheme);
void (*before_terminate)(struct damon_ctx *context);
};

13
mm/damon/core.c
View File

@ -1731,7 +1731,6 @@ static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t,
struct timespec64 begin, end;
unsigned long sz_applied = 0;
unsigned long sz_ops_filter_passed = 0;
int err = 0;
/*
* We plan to support multiple context per kdamond, as DAMON sysfs
* implies with 'nr_contexts' file. Nevertheless, only single context
@ -1771,14 +1770,10 @@ static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t,
if (damos_filter_out(c, t, r, s))
return;
ktime_get_coarse_ts64(&begin);
if (c->callback.before_damos_apply)
err = c->callback.before_damos_apply(c, t, r, s);
if (!err) {
trace_damos_before_apply(cidx, sidx, tidx, r,
damon_nr_regions(t), do_trace);
sz_applied = c->ops.apply_scheme(c, t, r, s,
&sz_ops_filter_passed);
}
trace_damos_before_apply(cidx, sidx, tidx, r,
damon_nr_regions(t), do_trace);
sz_applied = c->ops.apply_scheme(c, t, r, s,
&sz_ops_filter_passed);
damos_walk_call_walk(c, t, r, s, sz_ops_filter_passed);
ktime_get_coarse_ts64(&end);
quota->total_charged_ns += timespec64_to_ns(&end) -