On Tue 07-01-20 12:11:09, Theodore Y. Ts'o wrote: > Hmm..... There's actually an even more radical option we could use, > given that Ritesh has made dioread_nolock work on block sizes < page > size. We could make dioread_nolock the default, until we can revamp > ext4_writepages() to write the data blocks first.... Yes, that's a good point. And I'm not opposed to that if it makes the life simpler. But I'd like to see some performance numbers showing how much is writeback using unwritten extents slower so that we don't introduce too big regression with this... Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
