linux-5.15/shrink_node_memcgs()
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開始行:
*参照元 [#nb0f8385]
#backlinks
*説明 [#k15629a9]
-パス: [[linux-5.15/mm/vmscan.c]]
-FIXME: これは何？
--説明
**引数 [#s3427218]
-pg_data_t *pgdat
--メモリノード。
--[[linux-5.15/pg_data_t]]
-struct scan_control *sc
--
--[[linux-5.15/scan_control]]
**返り値 [#r8f231f8]
-なし
**参考 [#d1fdffc7]
*実装 [#x487257f]
static void shrink_node_memcgs(pg_data_t *pgdat, struct ...
{
struct mem_cgroup *target_memcg = sc->target_mem_cgroup;
struct mem_cgroup *memcg;
memcg = mem_cgroup_iter(target_memcg, NULL, NULL);
-
--[[linux-5.15/mem_cgroup]]
--[[linux-5.15/mem_cgroup_iter()]]
do {
struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
unsigned long reclaimed;
unsigned long scanned;
-
--[[linux-5.15/mem_cgroup_lruvec()]]
/*
* This loop can become CPU-bound when target memcgs
* aren't eligible for reclaim - either because they
* don't have any reclaimable pages, or because their
* memory is explicitly protected. Avoid soft lockups.
*/
cond_resched();
mem_cgroup_calculate_protection(target_memcg, memcg);
-
--[[linux-5.15/cond_resched()]]
--[[linux-5.15/mem_cgroup_calculate_protection()]]
if (mem_cgroup_below_min(memcg)) {
/*
* Hard protection.
* If there is no reclaimable memory, OOM.
*/
continue;
-
--[[linux-5.15/mem_cgroup_below_min()]]
} else if (mem_cgroup_below_low(memcg)) {
/*
* Soft protection.
* Respect the protection only as long as
* there is an unprotected supply
* of reclaimable memory from other cgroups.
*/
if (!sc->memcg_low_reclaim) {
sc->memcg_low_skipped = 1;
continue;
}
memcg_memory_event(memcg, MEMCG_LOW);
-
--[[linux-5.15/mem_cgroup_below_low()]]
--[[linux-5.15/memcg_memory_event()]]
}
reclaimed = sc->nr_reclaimed;
scanned = sc->nr_scanned;
shrink_lruvec(lruvec, sc);
shrink_slab(sc->gfp_mask, pgdat->node_id, memcg,
sc->priority);
-
--[[linux-5.15/shrink_lruvec()]]
--[[linux-5.15/shrink_slab()]]
/* Record the group's reclaim efficiency */
vmpressure(sc->gfp_mask, memcg, false,
sc->nr_scanned - scanned,
sc->nr_reclaimed - reclaimed);
} while ((memcg = mem_cgroup_iter(target_memcg, memcg, ...
}
-
--[[linux-5.15/vmpressure()]]
--[[linux-5.15/mem_cgroup_iter()]]
*コメント [#oea662d3]
終了行:
*参照元 [#nb0f8385]
#backlinks
*説明 [#k15629a9]
-パス: [[linux-5.15/mm/vmscan.c]]
-FIXME: これは何？
--説明
**引数 [#s3427218]
-pg_data_t *pgdat
--メモリノード。
--[[linux-5.15/pg_data_t]]
-struct scan_control *sc
--
--[[linux-5.15/scan_control]]
**返り値 [#r8f231f8]
-なし
**参考 [#d1fdffc7]
*実装 [#x487257f]
static void shrink_node_memcgs(pg_data_t *pgdat, struct ...
{
struct mem_cgroup *target_memcg = sc->target_mem_cgroup;
struct mem_cgroup *memcg;
memcg = mem_cgroup_iter(target_memcg, NULL, NULL);
-
--[[linux-5.15/mem_cgroup]]
--[[linux-5.15/mem_cgroup_iter()]]
do {
struct lruvec *lruvec = mem_cgroup_lruvec(memcg, pgdat);
unsigned long reclaimed;
unsigned long scanned;
-
--[[linux-5.15/mem_cgroup_lruvec()]]
/*
* This loop can become CPU-bound when target memcgs
* aren't eligible for reclaim - either because they
* don't have any reclaimable pages, or because their
* memory is explicitly protected. Avoid soft lockups.
*/
cond_resched();
mem_cgroup_calculate_protection(target_memcg, memcg);
-
--[[linux-5.15/cond_resched()]]
--[[linux-5.15/mem_cgroup_calculate_protection()]]
if (mem_cgroup_below_min(memcg)) {
/*
* Hard protection.
* If there is no reclaimable memory, OOM.
*/
continue;
-
--[[linux-5.15/mem_cgroup_below_min()]]
} else if (mem_cgroup_below_low(memcg)) {
/*
* Soft protection.
* Respect the protection only as long as
* there is an unprotected supply
* of reclaimable memory from other cgroups.
*/
if (!sc->memcg_low_reclaim) {
sc->memcg_low_skipped = 1;
continue;
}
memcg_memory_event(memcg, MEMCG_LOW);
-
--[[linux-5.15/mem_cgroup_below_low()]]
--[[linux-5.15/memcg_memory_event()]]
}
reclaimed = sc->nr_reclaimed;
scanned = sc->nr_scanned;
shrink_lruvec(lruvec, sc);
shrink_slab(sc->gfp_mask, pgdat->node_id, memcg,
sc->priority);
-
--[[linux-5.15/shrink_lruvec()]]
--[[linux-5.15/shrink_slab()]]
/* Record the group's reclaim efficiency */
vmpressure(sc->gfp_mask, memcg, false,
sc->nr_scanned - scanned,
sc->nr_reclaimed - reclaimed);
} while ((memcg = mem_cgroup_iter(target_memcg, memcg, ...
}
-
--[[linux-5.15/vmpressure()]]
--[[linux-5.15/mem_cgroup_iter()]]
*コメント [#oea662d3]
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