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mm/slub: Convert pfmemalloc_match() to take a struct slab 

Preparatory for mass conversion. Use the new slab_test_pfmemalloc()
helper.  As it doesn't do VM_BUG_ON(!PageSlab()) we no longer need the
pfmemalloc_match_unsafe() variant.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-10-04 14:46:40 +01:00 committed by Vlastimil Babka
parent 4020b4a226
commit 01b34d1631
1 changed files with 6 additions and 19 deletions
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25
mm/slub.c
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@ -2128,7 +2128,7 @@ static void put_cpu_partial(struct kmem_cache *s, struct page *page, int drain);
static inline void put_cpu_partial(struct kmem_cache *s, struct page *page,
int drain) { }
#endif
static inline bool pfmemalloc_match(struct page *page, gfp_t gfpflags);
static inline bool pfmemalloc_match(struct slab *slab, gfp_t gfpflags);
/*
* Try to allocate a partial slab from a specific node.
@ -2154,7 +2154,7 @@ static void *get_partial_node(struct kmem_cache *s, struct kmem_cache_node *n,
list_for_each_entry_safe(page, page2, &n->partial, slab_list) {
void *t;
if (!pfmemalloc_match(page, gfpflags))
if (!pfmemalloc_match(page_slab(page), gfpflags))
continue;
t = acquire_slab(s, n, page, object == NULL);
@ -2832,22 +2832,9 @@ slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid)
#endif
}
static inline bool pfmemalloc_match(struct page *page, gfp_t gfpflags)
static inline bool pfmemalloc_match(struct slab *slab, gfp_t gfpflags)
{
if (unlikely(PageSlabPfmemalloc(page)))
return gfp_pfmemalloc_allowed(gfpflags);
return true;
}
/*
* A variant of pfmemalloc_match() that tests page flags without asserting
* PageSlab. Intended for opportunistic checks before taking a lock and
* rechecking that nobody else freed the page under us.
*/
static inline bool pfmemalloc_match_unsafe(struct page *page, gfp_t gfpflags)
{
if (unlikely(__PageSlabPfmemalloc(page)))
if (unlikely(slab_test_pfmemalloc(slab)))
return gfp_pfmemalloc_allowed(gfpflags);
return true;
@ -2949,7 +2936,7 @@ redo:
* PFMEMALLOC but right now, we are losing the pfmemalloc
* information when the page leaves the per-cpu allocator
*/
if (unlikely(!pfmemalloc_match_unsafe(page, gfpflags)))
if (unlikely(!pfmemalloc_match(page_slab(page), gfpflags)))
goto deactivate_slab;
/* must check again c->page in case we got preempted and it changed */
@ -3061,7 +3048,7 @@ check_new_page:
}
}
if (unlikely(!pfmemalloc_match(page, gfpflags)))
if (unlikely(!pfmemalloc_match(page_slab(page), gfpflags)))
/*
* For !pfmemalloc_match() case we don't load freelist so that
* we don't make further mismatched allocations easier.