Re: [PATCH 1/4] btrfs: fix fast csum detection

[David Sterba <dsterba@suse.cz>]

On Mon, Apr 03, 2023 at 10:06:16PM -0700, Christoph Hellwig wrote:
> > > +	if (btrfs_csum_is_fast(csum_type))
> > > +		set_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags);
> > 
> > This ^^^
> > 
> > >  	fs_info->csum_size = btrfs_super_csum_size(disk_super);
> > >  
> > >  	ret = btrfs_init_csum_hash(fs_info, csum_type);
> > 
> > should be moved after the initialization btrfs_init_csum_hash so it
> > would also detect accelerated implementation of other hashes.
> 
> Sure.  Something like this incremental fix.  Do you want to fold it in
> or should I resend the series?

I ended up with the same diff when reviewing the patch so I can fold it,
no need to resend. I'll send a separate patch to add xxhash as a fast
implementation, with some numbers.