Re: [PATCH] fs/buffer: Make BH_Uptodate_Lock bit_spin_lock a regular spinlock_t

[Theodore Y. Ts'o]

On Fri, Nov 15, 2019 at 03:56:38PM +0100, Jan Kara wrote:
> With some effort, we could even shrink struct buffer_head from 104 bytes
> (on x86_64) to 96 bytes but I don't think that effort is worth it (I'd find
> it better use of time to actually work on getting rid of buffer heads
> completely).

Is that really realistic?  All aside from the very large number of
file systems which use buffer_heads that would have to be reworked,
the concept of buffer heads is pretty fundamental to how jbd2 is
architected.

					- Ted