> I was pointed by Glauber to the slab common code patches. I need some
> more time to read the patches. Now I think the slab/slot changes in this
> v3 are not needed, and can be ignored.
That may take some kernel cycles. You have a current issue here that needs
to be fixed.
> > down_write(&slub_lock);
> > - s = find_mergeable(size, align, flags, name, ctor);
> > + s = find_mergeable(size, align, flags, n, ctor);
> > if (s) {
> > s->refcount++;
> > /*
>
> ......
> up_write(&slub_lock);
> return s;
> }
>
> Here, the function returns without name string n be kfreed.
That is intentional since the string n is still referenced by the entry
that sysfs_slab_alias has created.
> But we couldn't kfree n here, because in sysfs_slab_alias(), if
> (slab_state < SYS_FS), the name need to be kept valid until
> slab_sysfs_init() is finished adding the entry into sysfs.
Right that is why it is not freed and that is what fixes the issue you
see.
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