On Mon 27-09-21 09:53:59, Sultan Alsawaf wrote: > On Mon, Sep 27, 2021 at 10:36:36AM +0200, Michal Hocko wrote: > > Can you be more specific about those scenarios please? > > I see frequent tmpfs mounts/unmounts in Android which result in lots of > superblocks being created and destroyed, and each superblock has its own > shrinker. This is an important detail to mention in the changelog. Including some details about the scale of the problem. > > I have a vague recollection that this approach has been proposed in the > > past. Have you checked previous attempts? > > I wasn't aware that there were previous attempts. Is this [1] the previous > attempt you're thinking of? It seems like the thread just died out. Was the main > gripe that always enabling CONFIG_SRCU increased the kernel's size too much when > tinyfication was desired? There were more discussions. I have also found https://lore.kernel.org/lkml/1510609063-3327-1-git-send-email-penguin-kernel@xxxxxxxxxxxxxxxxxxx My memory is quite dim and I do not have time to re-read those discussions again right now. But if I remember correctly the last one has died out because a deeper evaluation between the SRCU and rw semaphores was required. > Sultan > > [1] https://lore.kernel.org/all/153365347929.19074.12509495712735843805.stgit@localhost.localdomain/ -- Michal Hocko SUSE Labs
