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author | Minchan Kim <minchan@kernel.org> | 2022-01-21 22:13:57 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-22 08:33:37 +0200 |
commit | 0a5f079b810765be3bd931fce0f88154035af897 (patch) | |
tree | 0e2a6f6d9cfb3997e0fcf0bda4882f65f93ef141 | |
parent | 3828a76470792aaa5f2de5c0d7fce497187c1e35 (diff) | |
download | lwn-0a5f079b810765be3bd931fce0f88154035af897.tar.gz lwn-0a5f079b810765be3bd931fce0f88154035af897.zip |
zsmalloc: decouple class actions from zspage works
This patch moves class stat update out of obj_malloc since it's not
related to zspage operation. This is a preparation to introduce new
lock scheme in next patch.
Link: https://lkml.kernel.org/r/20211115185909.3949505-4-minchan@kernel.org
Signed-off-by: Minchan Kim <minchan@kernel.org>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r-- | mm/zsmalloc.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index e219593cb9de..c45807f170e8 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1360,17 +1360,19 @@ size_t zs_huge_class_size(struct zs_pool *pool) } EXPORT_SYMBOL_GPL(zs_huge_class_size); -static unsigned long obj_malloc(struct size_class *class, +static unsigned long obj_malloc(struct zs_pool *pool, struct zspage *zspage, unsigned long handle) { int i, nr_page, offset; unsigned long obj; struct link_free *link; + struct size_class *class; struct page *m_page; unsigned long m_offset; void *vaddr; + class = pool->size_class[zspage->class]; handle |= OBJ_ALLOCATED_TAG; obj = get_freeobj(zspage); @@ -1394,7 +1396,6 @@ static unsigned long obj_malloc(struct size_class *class, kunmap_atomic(vaddr); mod_zspage_inuse(zspage, 1); - class_stat_inc(class, OBJ_USED, 1); obj = location_to_obj(m_page, obj); @@ -1433,10 +1434,11 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t gfp) spin_lock(&class->lock); zspage = find_get_zspage(class); if (likely(zspage)) { - obj = obj_malloc(class, zspage, handle); + obj = obj_malloc(pool, zspage, handle); /* Now move the zspage to another fullness group, if required */ fix_fullness_group(class, zspage); record_obj(handle, obj); + class_stat_inc(class, OBJ_USED, 1); spin_unlock(&class->lock); return handle; @@ -1451,7 +1453,7 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t gfp) } spin_lock(&class->lock); - obj = obj_malloc(class, zspage, handle); + obj = obj_malloc(pool, zspage, handle); newfg = get_fullness_group(class, zspage); insert_zspage(class, zspage, newfg); set_zspage_mapping(zspage, class->index, newfg); @@ -1459,6 +1461,7 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t gfp) atomic_long_add(class->pages_per_zspage, &pool->pages_allocated); class_stat_inc(class, OBJ_ALLOCATED, class->objs_per_zspage); + class_stat_inc(class, OBJ_USED, 1); /* We completely set up zspage so mark them as movable */ SetZsPageMovable(pool, zspage); @@ -1468,7 +1471,7 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size, gfp_t gfp) } EXPORT_SYMBOL_GPL(zs_malloc); -static void obj_free(struct size_class *class, unsigned long obj) +static void obj_free(int class_size, unsigned long obj) { struct link_free *link; struct zspage *zspage; @@ -1478,7 +1481,7 @@ static void obj_free(struct size_class *class, unsigned long obj) void *vaddr; obj_to_location(obj, &f_page, &f_objidx); - f_offset = (class->size * f_objidx) & ~PAGE_MASK; + f_offset = (class_size * f_objidx) & ~PAGE_MASK; zspage = get_zspage(f_page); vaddr = kmap_atomic(f_page); @@ -1489,7 +1492,6 @@ static void obj_free(struct size_class *class, unsigned long obj) kunmap_atomic(vaddr); set_freeobj(zspage, f_objidx); mod_zspage_inuse(zspage, -1); - class_stat_dec(class, OBJ_USED, 1); } void zs_free(struct zs_pool *pool, unsigned long handle) @@ -1513,7 +1515,8 @@ void zs_free(struct zs_pool *pool, unsigned long handle) class = zspage_class(pool, zspage); spin_lock(&class->lock); - obj_free(class, obj); + obj_free(class->size, obj); + class_stat_dec(class, OBJ_USED, 1); fullness = fix_fullness_group(class, zspage); if (fullness != ZS_EMPTY) { migrate_read_unlock(zspage); @@ -1671,7 +1674,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, } used_obj = handle_to_obj(handle); - free_obj = obj_malloc(class, get_zspage(d_page), handle); + free_obj = obj_malloc(pool, get_zspage(d_page), handle); zs_object_copy(class, free_obj, used_obj); obj_idx++; /* @@ -1683,7 +1686,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, free_obj |= BIT(HANDLE_PIN_BIT); record_obj(handle, free_obj); unpin_tag(handle); - obj_free(class, used_obj); + obj_free(class->size, used_obj); } /* Remember last position in this iteration */ |