On Wed, May 18, 2022, Vitaly Kuznetsov wrote: > Maxim Levitsky <mlevitsk@xxxxxxxxxx> writes: > > Or if using kfifo, then it can contain plain u64 items, which is even more natural. > > > > In the next version I switch to fifo and get rid of 'flush_all' entries > but instead of a boolean I use a 'magic' value of '-1' in GVA. This way > we don't need to synchronize with the reader and add any special > handling for the flag. Isn't -1 theoretically possible? Or is wrapping not allowed? E.g. requesting a flush for address=0xfffffffffffff000, count = 0xfff will yield -1 and doesn't create any illegal addresses in the process.
