diff options
| author | Kent Overstreet <kent.overstreet@linux.dev> | 2024-03-02 13:27:50 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-03-07 23:18:26 -0500 |
| commit | 77fcd88de2ae1309c16e4fc35fb90cbc60c3d2ec (patch) | |
| tree | f8ba44500c7d06eed1f3c4794759b4226d6a7c09 /mm/slab_common.c | |
| parent | 1054c0f498fcb57de4858313d974aee23daf7376 (diff) | |
mm/slub: Make __ksize() fastervmalloc_size
with slab gone, we now have a free u32 in struct slab.
This steals it to make __ksize() faster; it's now a single dependent
load, instead of two. This is going to be important for tracking the
amount of memory stranded by RCU, which we want to be able to do if
we're going to be freeing all pagecache folios (and perhaps all folios)
via RCU.
Cc: linux-mm@kvack.org
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'mm/slab_common.c')
| -rw-r--r-- | mm/slab_common.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/mm/slab_common.c b/mm/slab_common.c index 6ec0f6543f34..f209b8cf4965 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -963,13 +963,12 @@ size_t __ksize(const void *object) if (WARN_ON(object != folio_address(folio))) return 0; return folio_size(folio); - } - + } else { #ifdef CONFIG_SLUB_DEBUG - skip_orig_size_check(folio_slab(folio)->slab_cache, object); + skip_orig_size_check(folio_slab(folio)->slab_cache, object); #endif - - return slab_ksize(folio_slab(folio)->slab_cache); + return folio_slab(folio)->object_size; + } } /** |