summaryrefslogtreecommitdiff
path: root/fs/kernfs/inode.c
diff options
context:
space:
mode:
authorAyush Mittal <ayush.m@samsung.com>2019-02-06 07:55:42 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-02-08 14:57:32 +0300
commit26e28d68b146ec17ecc1b1833077bc712de19637 (patch)
tree80cbc5a23bfefac2591b31c10b2e4c82a6767020 /fs/kernfs/inode.c
parent5b2f2bd62e79f6bc38fda5a0ff6a699f7612a7d2 (diff)
downloadlinux-26e28d68b146ec17ecc1b1833077bc712de19637.tar.xz
kernfs: Allocating memory for kernfs_iattrs with kmem_cache.
Creating a new cache for kernfs_iattrs. Currently, memory is allocated with kzalloc() which always gives aligned memory. On ARM, this is 64 byte aligned. To avoid the wastage of memory in aligning the size requested, a new cache for kernfs_iattrs is created. Size of struct kernfs_iattrs is 80 Bytes. On ARM, it will come in kmalloc-128 slab. and it will come in kmalloc-192 slab if debug info is enabled. Extra bytes taken 48 bytes. Total number of objects created : 4096 Total saving = 48*4096 = 192 KB After creating new slab(When debug info is enabled) : sh-3.2# cat /proc/slabinfo ... kernfs_iattrs_cache 4069 4096 128 32 1 : tunables 0 0 0 : slabdata 128 128 0 ... All testing has been done on ARM target. Signed-off-by: Ayush Mittal <ayush.m@samsung.com> Signed-off-by: Vaneet Narang <v.narang@samsung.com> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/inode.c')
-rw-r--r--fs/kernfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 80cebcd94c90..0c1fd945ce42 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -42,7 +42,7 @@ static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)
if (kn->iattr)
goto out_unlock;
- kn->iattr = kzalloc(sizeof(struct kernfs_iattrs), GFP_KERNEL);
+ kn->iattr = kmem_cache_zalloc(kernfs_iattrs_cache, GFP_KERNEL);
if (!kn->iattr)
goto out_unlock;
iattrs = &kn->iattr->ia_iattr;