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2025 at 09:06:04AM -0700, Christoph Lameter (Ampere) wrote: > On Mon, 9 Jun 2025, Harry Yoo wrote: > > > [ field ] [ offset ] [ size ] > > page->mapping 24 8 > > page->lru 8 16 > > > > slab->next 16 8 > > slab->slabs 24 4 > > > > Reorder ->slabs and ->next, so that the layout will be: > > > > slab->slabs 16 4 > > slab->next 24 8 > > > > After reordering, slab->slabs shares its offset with page->lru.prev, > > which is not a problem. slab->next now shares the offset with > > page->mapping, but that's fine, as a slab is double-word aligned. > > Add comments to document the trickery that is going on here? Otherwise we > may stumble across this issue again later. Will add, thanks! -- Cheers, Harry / Hyeonggon