From: Chen Wandun chenwandun@huawei.com
hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4HOXK CVE: NA
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This reverts commit 7be2f4c4fdd7938f161ff6e43a0c60d9c9412a62. This feature will be reimplement.
Signed-off-by: Chen Wandun chenwandun@huawei.com Reviewed-by: Tong Tiangen tongtiangen@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- include/linux/page_cache_limit.h | 9 ------ mm/page_cache_limit.c | 27 +++------------- mm/vmscan.c | 53 ++------------------------------ 3 files changed, 6 insertions(+), 83 deletions(-)
diff --git a/include/linux/page_cache_limit.h b/include/linux/page_cache_limit.h index e4ef5919cb92..98f12734114b 100644 --- a/include/linux/page_cache_limit.h +++ b/include/linux/page_cache_limit.h @@ -2,21 +2,12 @@ #define _PAGECACHE_H
#ifdef CONFIG_SHRINK_PAGECACHE -enum page_cache_reclaim_flag { - PAGE_CACHE_RECLAIM_NO_UNMAP, - PAGE_CACHE_RECLAIM_UNMAP, - PAGE_CACHE_RECLAIM_WRITEPAGE, - PAGE_CACHE_RECLAIM_NR_FLAGS, -}; - extern int pagecache_reclaim_enable; extern int pagecache_limit_ratio; extern int pagecache_reclaim_ratio;
int proc_page_cache_limit(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); -unsigned long __shrink_node_page_cache(int nid, gfp_t mask, - unsigned long nr_to_reclaim, enum page_cache_reclaim_flag flag); #else #endif
diff --git a/mm/page_cache_limit.c b/mm/page_cache_limit.c index 1581334429e1..33164e19cfa2 100644 --- a/mm/page_cache_limit.c +++ b/mm/page_cache_limit.c @@ -4,8 +4,6 @@ #include <linux/kthread.h> #include <linux/module.h> #include <linux/err.h> -#include <linux/swap.h> -#include <linux/page_cache_limit.h>
int pagecache_reclaim_enable; int pagecache_limit_ratio; @@ -144,31 +142,14 @@ static unsigned long node_nr_page_reclaim(int nid) return nr_to_reclaim; }
-static void shrink_node_page_cache(int nid, gfp_t mask) +static void shrink_node_page_cache(int nid) { - int i; unsigned long nr_to_reclaim; - unsigned long nr_reclaimed; - enum page_cache_reclaim_flag flag;
nr_to_reclaim = node_nr_page_reclaim(nid); - if (nr_to_reclaim <= 0) - return; - - flag = 0; - for (i = PAGE_CACHE_RECLAIM_NO_UNMAP; - i < PAGE_CACHE_RECLAIM_NR_FLAGS; i++) { - nr_reclaimed = __shrink_node_page_cache(nid, mask, nr_to_reclaim, flag); - nr_to_reclaim -= nr_reclaimed; - - if (nr_to_reclaim <= 0) - break; - - flag |= i; - } }
-static void shrink_page_cache(gfp_t mask) +static void shrink_page_cache(void) { int nid;
@@ -176,7 +157,7 @@ static void shrink_page_cache(gfp_t mask) return;
for_each_node_state(nid, N_MEMORY) - shrink_node_page_cache(nid, mask); + shrink_node_page_cache(nid); }
static DECLARE_COMPLETION(setup_done); @@ -192,7 +173,7 @@ static int pagecache_limitd(void *arg) set_freezable(); for (;;) { try_to_freeze(); - shrink_page_cache(GFP_KERNEL | __GFP_HIGHMEM); + shrink_page_cache();
prepare_to_wait(pagecache_limitd_wait_queue[nid], &wait, TASK_INTERRUPTIBLE); diff --git a/mm/vmscan.c b/mm/vmscan.c index c851e5f91842..7aea8c2cf0a8 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -64,10 +64,6 @@ #define CREATE_TRACE_POINTS #include <trace/events/vmscan.h>
-#ifdef CONFIG_SHRINK_PAGECACHE -#include <linux/page_cache_limit.h> -#endif - struct scan_control { /* How many pages shrink_list() should reclaim */ unsigned long nr_to_reclaim; @@ -128,9 +124,6 @@ struct scan_control { /* The file pages on the current node are dangerously low */ unsigned int file_is_tiny:1;
- /* can't shrink slab pages */ - unsigned int no_shrink_slab:1; - /* Allocation order */ s8 order;
@@ -2880,9 +2873,8 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
shrink_lruvec(lruvec, sc);
- if (!sc->no_shrink_slab) - shrink_slab(sc->gfp_mask, pgdat->node_id, memcg, - sc->priority); + shrink_slab(sc->gfp_mask, pgdat->node_id, memcg, + sc->priority);
/* Record the group's reclaim efficiency */ vmpressure(sc->gfp_mask, memcg, false, @@ -4600,44 +4592,3 @@ struct page *get_page_from_vaddr(struct mm_struct *mm, unsigned long vaddr) return page; } EXPORT_SYMBOL_GPL(get_page_from_vaddr); - -#ifdef CONFIG_SHRINK_PAGECACHE -/* - * return the number of reclaimed pages - */ -unsigned long __shrink_node_page_cache(int nid, gfp_t mask, unsigned long nr_to_reclaim, - enum page_cache_reclaim_flag reclaim_flag) -{ - struct scan_control sc = { - .nr_to_reclaim = nr_to_reclaim, - .gfp_mask = mask, - .may_swap = 0, - .may_unmap = reclaim_flag | PAGE_CACHE_RECLAIM_UNMAP, - .may_writepage = reclaim_flag | PAGE_CACHE_RECLAIM_WRITEPAGE, - .target_mem_cgroup = NULL, - .priority = DEF_PRIORITY, - .reclaim_idx = MAX_NR_ZONES, - .no_shrink_slab = 1, - }; - - struct zonelist *zonelist = node_zonelist(nid, __GFP_THISNODE); - struct reclaim_state *old_rs = current->reclaim_state; - unsigned long nr_reclaimed; - unsigned int noreclaim_flag; - - if (!(mask & __GFP_RECLAIM)) - return 0; - - noreclaim_flag = memalloc_noreclaim_save(); - fs_reclaim_acquire(sc.gfp_mask); - current->reclaim_state = NULL; - - nr_reclaimed = do_try_to_free_pages(zonelist, &sc); - - current->reclaim_state = old_rs; - fs_reclaim_release(sc.gfp_mask); - memalloc_noreclaim_restore(noreclaim_flag); - - return nr_reclaimed; -} -#endif