Re: [PATCH v3 0/6] inode: turn i_state into u32

[Josef Bacik <josef@toxicpanda.com>]

On Fri, Aug 23, 2024 at 02:47:34PM +0200, Christian Brauner wrote:
> Hey,
> 
> This is v3. I changed to manual barriers as requested and commented
> them.
> 
> ---
> 
> I've recently looked for some free space in struct inode again because
> of some exec kerfuffle we recently had and while my idea didn't turn
> into anything I noticed that we often waste bytes when using wait bit
> operations. So I set out to switch that to another mechanism that would
> allow us to free up bytes. So this is an attempt to turn i_state from
> an unsigned long into an u32 using the individual bytes of i_state as
> addresses for the wait var event mechanism (Thanks to Linus for that idea.).
> 
> This survives LTP, xfstests on various filesystems, and will-it-scale.
> 
> To: Linus Torvalds <torvalds@linux-foundation.org>
> Cc: NeilBrown <neilb@suse.de>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Jeff Layton <jlayton@kernel.org>
> Cc: Jan Kara <jack@suse.cz>
> Cc: Christian Brauner <brauner@kernel.org>
> Cc: linux-fsdevel@vger.kernel.org
> Signed-off-by: Christian Brauner <brauner@kernel.org>

Reviewed-by: Josef Bacik <josef@toxicpanda.com>

Thanks,

Josef