On Wed 20-03-19 08:17:52, Nicolas Boichat wrote: > On Wed, Mar 20, 2019 at 3:18 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > > > On Tue 19-03-19 11:37:51, Andrew Morton wrote: > > > From: Nicolas Boichat <drinkcat@xxxxxxxxxxxx> > > > Subject: mm: add /sys/kernel/slab/cache/cache_dma32 > > > > > > A previous patch in this series adds support for SLAB_CACHE_DMA32 kmem > > > caches. This adds the corresponding /sys/kernel/slab/cache/cache_dma32 > > > entries, and fixes slabinfo tool. > > > > I believe I have asked and didn't get a satisfactory answer before IIRC. Who > > is going to consume this information? > > No answer from me, but as a reminder, I added this note on the patch > (https://patchwork.kernel.org/patch/10720491/): > """ > There were different opinions on whether this sysfs entry should > be added, so I'll leave it up to the mm/slub maintainers to decide > whether they want to pick this up, or drop it. > """ We have a terrible track rescord of exporting data to userspace that kick back much later. So I am really convinced that adding new user visible data should be justified by a useful usecase. Exporting just because we can is a terrible justification if you ask me. -- Michal Hocko SUSE Labs
