On Wed, Nov 17, 2021 at 11:57:12PM +0000, Song Liu wrote: > I would agree that __text_poke() is a safer option. But in this case, we > will need the temporary hole to be 2MB in size. Also, we will probably > hold the temporary mapping for longer time (the whole JITing process). > Does this sound reasonable? No :-) Jit to a buffer, then copy the buffer into the 2M page using 4k aliases. IIRC each program is still smaller than a single page, right? So at no point do you need more than 2 pages mapped anyway.
