On Thu, May 18, 2023 at 6:24 PM Kent Overstreet <kent.overstreet@xxxxxxxxx> wrote: > > On Thu, May 18, 2023 at 01:51:08PM -0700, Song Liu wrote: > > > To allocate memory for text, we will allocate 2MiB, make it ROX, and then > > use it for many small allocations. IIUC, buddy allocator will use unallocated > > parts of this page for metadata. I guess this may be a problem, as the > > whole page is ROX now, and we have to use text_poke to write to it. > > The standard kernel buddy allocator does _not_ store anything in the > page itself - because the page might be a highmem page. Thanks for the correction. Song > > That's also why I went with the bitmap for my slab allocator; standard > kernel slab allocator stores a freelist ptr in free objects.
