On Fri, Sep 15, 2023 at 10:59:23AM +0000, Matteo Rizzo wrote: > From: Jann Horn <jannh@xxxxxxxxxx> > > This is refactoring in preparation for the introduction of SLAB_VIRTUAL > which does not implement folio_slab. > > With SLAB_VIRTUAL there is no longer a 1:1 correspondence between slabs > and pages of physical memory used by the slab allocator. There is no way > to look up the slab which corresponds to a specific page of physical > memory without iterating over all slabs or over the page tables. Instead > of doing that, we can look up the slab starting from its virtual address > which can still be performed cheaply with both SLAB_VIRTUAL enabled and > disabled. > > Signed-off-by: Jann Horn <jannh@xxxxxxxxxx> Refactoring continues to track. Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> -- Kees Cook
