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mm/damon/modules: deduplicate init steps for DAMON context setup

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DAMON_RECLAIM and DAMON_LRU_SORT has duplicated code for DAMON context and
target initializations.  Deduplicate the part by implementing a function
for the initialization in 'modules-common.c' and using it.

Link: https://lkml.kernel.org/r/20221026225943.100429-12-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 2022-10-26 22:59:42 +00:00 committed by Andrew Morton
parent c8e7b4d0ba
commit 7ae2c17f53
5 changed files with 53 additions and 30 deletions
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4
mm/damon/Makefile
View File

@ -5,5 +5,5 @@ obj-$(CONFIG_DAMON_VADDR) += ops-common.o vaddr.o
obj-$(CONFIG_DAMON_PADDR) += ops-common.o paddr.o
obj-$(CONFIG_DAMON_SYSFS) += sysfs-common.o sysfs-schemes.o sysfs.o
obj-$(CONFIG_DAMON_DBGFS) += dbgfs.o
obj-$(CONFIG_DAMON_RECLAIM) += reclaim.o
obj-$(CONFIG_DAMON_LRU_SORT) += lru_sort.o
obj-$(CONFIG_DAMON_RECLAIM) += modules-common.o reclaim.o
obj-$(CONFIG_DAMON_LRU_SORT) += modules-common.o lru_sort.o

17
mm/damon/lru_sort.c
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@ -314,25 +314,14 @@ static int damon_lru_sort_after_wmarks_check(struct damon_ctx *c)
static int __init damon_lru_sort_init(void)
{
ctx = damon_new_ctx();
if (!ctx)
return -ENOMEM;
int err = damon_modules_new_paddr_ctx_target(&ctx, &target);
if (damon_select_ops(ctx, DAMON_OPS_PADDR)) {
damon_destroy_ctx(ctx);
return -EINVAL;
}
if (err)
return err;
ctx->callback.after_wmarks_check = damon_lru_sort_after_wmarks_check;
ctx->callback.after_aggregation = damon_lru_sort_after_aggregation;
target = damon_new_target();
if (!target) {
damon_destroy_ctx(ctx);
return -ENOMEM;
}
damon_add_target(ctx, target);
schedule_delayed_work(&damon_lru_sort_timer, 0);
damon_lru_sort_initialized = true;

42
mm/damon/modules-common.c Normal file
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@ -0,0 +1,42 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Common Primitives for DAMON Modules
*
* Author: SeongJae Park <sjpark@amazon.de>
*/
#include <linux/damon.h>
#include "modules-common.h"
/*
* Allocate, set, and return a DAMON context for the physical address space.
* @ctxp: Pointer to save the point to the newly created context
* @targetp: Pointer to save the point to the newly created target
*/
int damon_modules_new_paddr_ctx_target(struct damon_ctx **ctxp,
struct damon_target **targetp)
{
struct damon_ctx *ctx;
struct damon_target *target;
ctx = damon_new_ctx();
if (!ctx)
return -ENOMEM;
if (damon_select_ops(ctx, DAMON_OPS_PADDR)) {
damon_destroy_ctx(ctx);
return -EINVAL;
}
target = damon_new_target();
if (!target) {
damon_destroy_ctx(ctx);
return -ENOMEM;
}
damon_add_target(ctx, target);
*ctxp = ctx;
*targetp = target;
return 0;
}

3
mm/damon/modules-common.h
View File

@ -44,3 +44,6 @@
0400); \
module_param_named(nr_##qt_exceed_name, stat.qt_exceeds, ulong, \
0400);
int damon_modules_new_paddr_ctx_target(struct damon_ctx **ctxp,
struct damon_target **targetp);

17
mm/damon/reclaim.c
View File

@ -256,25 +256,14 @@ static int damon_reclaim_after_wmarks_check(struct damon_ctx *c)
static int __init damon_reclaim_init(void)
{
ctx = damon_new_ctx();
if (!ctx)
return -ENOMEM;
int err = damon_modules_new_paddr_ctx_target(&ctx, &target);
if (damon_select_ops(ctx, DAMON_OPS_PADDR)) {
damon_destroy_ctx(ctx);
return -EINVAL;
}
if (err)
return err;
ctx->callback.after_wmarks_check = damon_reclaim_after_wmarks_check;
ctx->callback.after_aggregation = damon_reclaim_after_aggregation;
target = damon_new_target();
if (!target) {
damon_destroy_ctx(ctx);
return -ENOMEM;
}
damon_add_target(ctx, target);
schedule_delayed_work(&damon_reclaim_timer, 0);
damon_reclaim_initialized = true;