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xfs: use a separate slab cache for deferred xattr work state

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Create a separate slab cache for struct xfs_attr_item objects, since we
can pack the (104-byte) intent items more tightly than we can with the
general slab cache objects.  On x86, this means 39 intents per memory
page instead of 32.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2022-05-22 15:59:48 +10:00 committed by Dave Chinner
parent b53d212b4b
commit e2c78949b6
4 changed files with 31 additions and 2 deletions
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20
fs/xfs/libxfs/xfs_attr.c
View file

@ -29,6 +29,7 @@
struct kmem_cache *xfs_attri_cache;
struct kmem_cache *xfs_attrd_cache;
struct kmem_cache *xfs_attr_intent_cache;
/*
* xfs_attr.c
@ -902,7 +903,7 @@ xfs_attr_item_init(
struct xfs_attr_item *new;
new = kmem_zalloc(sizeof(struct xfs_attr_item), KM_NOFS);
new = kmem_cache_zalloc(xfs_attr_intent_cache, GFP_NOFS | __GFP_NOFAIL);
new->xattri_op_flags = op_flags;
new->xattri_da_args = args;
@ -1650,3 +1651,20 @@ xfs_attr_namecheck(
/* There shouldn't be any nulls here */
return !memchr(name, 0, length);
}
int __init
xfs_attr_intent_init_cache(void)
{
xfs_attr_intent_cache = kmem_cache_create("xfs_attr_item",
sizeof(struct xfs_attr_item),
0, 0, NULL);
return xfs_attr_intent_cache != NULL ? 0 : -ENOMEM;
}
void
xfs_attr_intent_destroy_cache(void)
{
kmem_cache_destroy(xfs_attr_intent_cache);
xfs_attr_intent_cache = NULL;
}

4
fs/xfs/libxfs/xfs_attr.h
View file

@ -634,4 +634,8 @@ xfs_attr_init_replace_state(struct xfs_da_args *args)
return xfs_attr_init_add_state(args);
}
extern struct kmem_cache *xfs_attr_intent_cache;
int __init xfs_attr_intent_init_cache(void);
void xfs_attr_intent_destroy_cache(void);
#endif /* __XFS_ATTR_H__ */

4
fs/xfs/libxfs/xfs_defer.c
View file

@ -877,6 +877,9 @@ xfs_defer_init_item_caches(void)
if (error)
goto err;
error = xfs_attrd_init_cache();
if (error)
goto err;
error = xfs_attr_intent_init_cache();
if (error)
goto err;
return 0;
@ -889,6 +892,7 @@ xfs_defer_init_item_caches(void)
void
xfs_defer_destroy_item_caches(void)
{
xfs_attr_intent_destroy_cache();
xfs_attri_destroy_cache();
xfs_attrd_destroy_cache();
xfs_extfree_intent_destroy_cache();

5
fs/xfs/xfs_attr_item.c
View file

@ -404,7 +404,10 @@ xfs_attr_free_item(
{
if (attr->xattri_da_state)
xfs_da_state_free(attr->xattri_da_state);
kmem_free(attr);
if (attr->xattri_da_args->op_flags & XFS_DA_OP_RECOVERY)
kmem_free(attr);
else
kmem_cache_free(xfs_attr_intent_cache, attr);
}
/* Process an attr. */