[dm-devel] [PATCH 2/3] Introduce percpu rw semaphores
Paul E. McKenney
paulmck at linux.vnet.ibm.com
Mon Jul 30 17:00:13 UTC 2012
On Sun, Jul 29, 2012 at 01:13:34AM -0400, Mikulas Patocka wrote:
> On Sat, 28 Jul 2012, Eric Dumazet wrote:
> > On Sat, 2012-07-28 at 12:41 -0400, Mikulas Patocka wrote:
[ . . . ]
> > (bdev->bd_block_size should be read exactly once )
>
> Rewrite all direct and non-direct io code so that it reads block size just
> once ...
For whatever it is worth, the 3.5 Linux kernel only has about ten mentions
of bd_block_size, at least according to cscope.
Thanx, Paul
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