Re: 2.4.21-pre2 stalls out when running unixbench

[Christoph Hellwig]

On Sat, Jan 04, 2003 at 03:11:45AM -0800, Andrew Morton wrote:
> Sure, we don't need atomic semantics for the BH_Attached bit because
> it is always read and modified under a global spinlock.  But *other*
> users of buffer_head.b_state do not run under that lock so the nonatomic
> RMW will stomp on their changes.   2.4.20 does not have this bug.

Thanks, I still had to learn something about *_bit() semantics.

And sorry for introducing that bug..