mm/slab: replace slab.stride with obj_exts_in_object

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The stride field is used to convert object index to an slabobj_ext so
both compact arrays (kmalloc() or in-slab-leftover) and spread
in-object-padding obj_ext layouts are supported.

In practice thus the stride is always sizeof(slabobj_ext) or s->size.

This simplifies the calculations, but with the upcoming slabobj_ext
handling changes, it will be easier to stop storing the stride and
instead just have a flag whether obj_ext is in the object padding.
obj_exts_in_object() can then rely on this flag and slab_obj_ext()
can use that to determine the stride.

No functional change intended.

Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Hao Li <hao.li@linux.dev>
Link: https://patch.msgid.link/20260727-b4-objext_split-v3-7-c29ef0f1f257@kernel.org
Reviewed-by: Harry Yoo (Oracle) <harry@kernel.org>
Signed-off-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>

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This commit is contained in:

Vlastimil Babka (SUSE) 2026-07-27 14:54:01 +02:00

parent e684ee3bb5

commit b5bc35ace2

2 changed files with 41 additions and 45 deletions

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44

mm/slab.h

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44

mm/slub.c

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