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xarray: use kmem_cache_alloc_lru to allocate xa_node

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The workingset will add the xa_node to the shadow_nodes list.  So the
allocation of xa_node should be done by kmem_cache_alloc_lru().  Using
xas_set_lru() to pass the list_lru which we want to insert xa_node into to
set up the xa_node reclaim context correctly.

Link: https://lkml.kernel.org/r/20220228122126.37293-9-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Alex Shi <alexs@kernel.org>
Cc: Anna Schumaker <Anna.Schumaker@Netapp.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Fam Zheng <fam.zheng@bytedance.com>
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Kari Argillander <kari.argillander@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Muchun Song 2022-03-22 14:41:12 -07:00 committed by Linus Torvalds
parent f53bf711d4
commit 9bbdc0f324
4 changed files with 18 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/swap.h
View File

@ -334,9 +334,12 @@ void workingset_activation(struct folio *folio);
/* Only track the nodes of mappings with shadow entries */
void workingset_update_node(struct xa_node *node);
extern struct list_lru shadow_nodes;
#define mapping_set_update(xas, mapping) do { \
if (!dax_mapping(mapping) && !shmem_mapping(mapping)) \
if (!dax_mapping(mapping) && !shmem_mapping(mapping)) { \
xas_set_update(xas, workingset_update_node); \
xas_set_lru(xas, &shadow_nodes); \
} \
} while (0)
/* linux/mm/page_alloc.c */

9
include/linux/xarray.h
View File

@ -1317,6 +1317,7 @@ struct xa_state {
struct xa_node *xa_node;
struct xa_node *xa_alloc;
xa_update_node_t xa_update;
struct list_lru *xa_lru;
};
/*
@ -1336,7 +1337,8 @@ struct xa_state {
.xa_pad = 0, \
.xa_node = XAS_RESTART, \
.xa_alloc = NULL, \
.xa_update = NULL \
.xa_update = NULL, \
.xa_lru = NULL, \
}
/**
@ -1631,6 +1633,11 @@ static inline void xas_set_update(struct xa_state *xas, xa_update_node_t update)
xas->xa_update = update;
}
static inline void xas_set_lru(struct xa_state *xas, struct list_lru *lru)
{
xas->xa_lru = lru;
}
/**
* xas_next_entry() - Advance iterator to next present entry.
* @xas: XArray operation state.

10
lib/xarray.c
View File

@ -302,7 +302,7 @@ bool xas_nomem(struct xa_state *xas, gfp_t gfp)
}
if (xas->xa->xa_flags & XA_FLAGS_ACCOUNT)
gfp |= __GFP_ACCOUNT;
xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp);
xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp);
if (!xas->xa_alloc)
return false;
xas->xa_alloc->parent = NULL;
@ -334,10 +334,10 @@ static bool __xas_nomem(struct xa_state *xas, gfp_t gfp)
gfp |= __GFP_ACCOUNT;
if (gfpflags_allow_blocking(gfp)) {
xas_unlock_type(xas, lock_type);
xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp);
xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp);
xas_lock_type(xas, lock_type);
} else {
xas->xa_alloc = kmem_cache_alloc(radix_tree_node_cachep, gfp);
xas->xa_alloc = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp);
}
if (!xas->xa_alloc)
return false;
@ -371,7 +371,7 @@ static void *xas_alloc(struct xa_state *xas, unsigned int shift)
if (xas->xa->xa_flags & XA_FLAGS_ACCOUNT)
gfp |= __GFP_ACCOUNT;
node = kmem_cache_alloc(radix_tree_node_cachep, gfp);
node = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp);
if (!node) {
xas_set_err(xas, -ENOMEM);
return NULL;
@ -1014,7 +1014,7 @@ void xas_split_alloc(struct xa_state *xas, void *entry, unsigned int order,
void *sibling = NULL;
struct xa_node *node;
node = kmem_cache_alloc(radix_tree_node_cachep, gfp);
node = kmem_cache_alloc_lru(radix_tree_node_cachep, xas->xa_lru, gfp);
if (!node)
goto nomem;
node->array = xas->xa;

2
mm/workingset.c
View File

@ -429,7 +429,7 @@ out:
* point where they would still be useful.
*/
static struct list_lru shadow_nodes;
struct list_lru shadow_nodes;
void workingset_update_node(struct xa_node *node)
{