On 9/30/21 8:48 PM, Rustam Kovhaev wrote: > On Thu, Sep 30, 2021 at 10:13:40AM +0200, Vlastimil Babka wrote: >> >> I think it's fair if something like XFS (not meant for tiny systems AFAIK?) >> excludes SLOB (meant for tiny systems). Clearly nobody tried to use these >> two together last 5 years anyway. > > +1 for adding Kconfig option, it seems like some things are not meant to > be together. But if we patch SLOB, we won't need it. >> Maybe we could also just add the 4 bytes to all SLOB objects, declare >> kfree() is always fine and be done with it. Yes, it will make SLOB footprint >> somewhat less tiny, but even whan we added kmalloc power of two alignment >> guarantees, the impact on SLOB was negligible. > > I'll send a patch to add a 4-byte header for kmem_cache_alloc() > allocations. Thanks. Please report in the changelog slab usage from /proc/meminfo before and after patch (at least a snapshot after a full boot). >>> Thoughts? >>> >>> Cheers, >>> >>> Dave. >>> >>
