On Wed, Feb 06, 2019 at 10:25:42AM +0530, Ayush Mittal wrote: > 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 <[email protected]> > Signed-off-by: Vaneet Narang <[email protected]>
Acked-by: Tejun Heo <[email protected]> Thanks. -- tejun
