On 10/30/20 4:22 PM, Al Viro wrote: > On Fri, Oct 30, 2020 at 02:33:11PM -0600, Jens Axboe wrote: >> On 10/30/20 12:49 PM, Al Viro wrote: >>> On Fri, Oct 30, 2020 at 12:46:26PM -0600, Jens Axboe wrote: >>> >>>> See other reply, it's being posted soon, just haven't gotten there yet >>>> and it wasn't ready. >>>> >>>> It's a prep patch so we can call do_renameat2 and pass in a filename >>>> instead. The intent is not to have any functional changes in that prep >>>> patch. But once we can pass in filenames instead of user pointers, it's >>>> usable from io_uring. >>> >>> You do realize that pathname resolution is *NOT* offloadable to helper >>> threads, I hope... >> >> How so? If we have all the necessary context assigned, what's preventing >> it from working? > > Semantics of /proc/self/..., for starters (and things like /proc/mounts, etc. > *do* pass through that, /dev/stdin included) Don't we just need ->thread_pid for that to work? -- Jens Axboe
