On Tue, 18 Apr 2017, Sergey Senozhatsky wrote: > > Simple solution is to not allocate pages via the slab allocator but use > > the page allocator for this. The page allocator provides proper alignment. > > sure, but at the same time it's not completely uncommon and unseen thing > > ~/_next$ git grep kmalloc | grep PAGE_SIZE | wc -l > 75
Of course if you want a PAGE_SIZE object that is not really page aligned etc then its definitely ok to use. > not all, if any, of those pages get into copy_page(), of course. may be... > hopefully. > so may be a warning would make sense and save time some day. but up to MM > people to decide. Slab objects are copied using memcpy. copy_page is for pages aligned to page boundaries and the arch code there may have additional expectations that cannot be met by the slab allocators. > p.s. Christoph, FYI, gmail automatically marked your message > as a spam message, for some reason. Weird. Any more details as to why?
