On Thu, Apr 20, 2023 at 02:28:36PM +0200, Pankaj Raghav wrote: > On 2023-04-20 14:19, Hannes Reinecke wrote: > >> > >> **Questions on the future work**: > >> > >> As willy pointed out, we have to do this `order = mapping->host->i_blkbits - PAGE_SHIFT` in > >> many places. Should we pursue something that willy suggested: encapsulating order in the > >> mapping->flags as a next step?[1] > >> > >> > >> [1] https://lore.kernel.org/lkml/ZDty+PQfHkrGBojn@xxxxxxxxxxxxxxxxxxxx/ I wouldn't mind XFS gaining a means to control folio sizes, personally. At least that would make it easier to explore things like copy on write with large weird file allocation unit sizes (2MB, 28k, etc). > > > > Well ... really, not sure. > > Yes, continue updating buffer_heads would be a logical thing as it could be done incrementally. > > > > But really, the end-goal should be to move away from buffer_heads for fs and mm usage. So I wonder > > if we shouldn't rather look in that direction.. > > > Yeah, I understand that part. Hopefully, this will be discussed as a part of LSFMM. Agree. --D > > But the changes that are done in filemap and readahead needs to be done anyway irrespective of the > underlying aops right? Or Am I missing something. > > > Cheers, > > > > Hannes > >
