On Wed, 13 Jun 2018, Christoph Hellwig wrote: > On Wed, Jun 13, 2018 at 01:01:22PM -0400, Mikulas Patocka wrote: > > Hi > > > > I'd like to ask about this patch - will you commit it, or do you want to > > make some more changes to it? > > How about you resend it with the series adding an actual user once > ready? I haven't actually seen patches using it posted on any list yet. dm-bufio is already using it. Starting with the kernel 4.17 (f51f2e0a7fb1 - "dm bufio: support non-power-of-two block sizes"), dm-bufio has the capability to use non-power-of-two buffers. It uses slab cache for its buffers - so we would like to have this slab optimization - to avoid excessive memory wasting. Originally, the slub patch used a new flag SLAB_MINIMIZE_WASTE, but after a suggestion from others, I reworked the patch so that it minimizes waste of all slub caches and doesn't need an extra flag to activate. Mikulas
