From: Sergey Senozhatsky Date: Tue, 8 Sep 2015 22:04:33 +0000 (-0700) Subject: zsmalloc: cosmetic compaction code adjustments X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0dc63d488a2a433a4a85d3908b3f195c4e6450d2;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git zsmalloc: cosmetic compaction code adjustments Change zs_object_copy() argument order to be (DST, SRC) rather than (SRC, DST). copy/move functions usually have (to, from) arguments order. Rename alloc_target_page() to isolate_target_page(). This function doesn't allocate anything, it isolates target page, pretty much like isolate_source_page(). Tweak __zs_compact() comment. Signed-off-by: Sergey Senozhatsky Acked-by: Minchan Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 4b39e5eaf34f..2a1f95249f12 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1471,7 +1471,7 @@ void zs_free(struct zs_pool *pool, unsigned long handle) } EXPORT_SYMBOL_GPL(zs_free); -static void zs_object_copy(unsigned long src, unsigned long dst, +static void zs_object_copy(unsigned long dst, unsigned long src, struct size_class *class) { struct page *s_page, *d_page; @@ -1612,7 +1612,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, used_obj = handle_to_obj(handle); free_obj = obj_malloc(d_page, class, handle); - zs_object_copy(used_obj, free_obj, class); + zs_object_copy(free_obj, used_obj, class); index++; record_obj(handle, free_obj); unpin_tag(handle); @@ -1628,7 +1628,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, return ret; } -static struct page *alloc_target_page(struct size_class *class) +static struct page *isolate_target_page(struct size_class *class) { int i; struct page *page; @@ -1718,11 +1718,11 @@ static unsigned long __zs_compact(struct zs_pool *pool, cc.index = 0; cc.s_page = src_page; - while ((dst_page = alloc_target_page(class))) { + while ((dst_page = isolate_target_page(class))) { cc.d_page = dst_page; /* - * If there is no more space in dst_page, try to - * allocate another zspage. + * If there is no more space in dst_page, resched + * and see if anyone had allocated another zspage. */ if (!migrate_zspage(pool, class, &cc)) break;