On Gwe, 2005-12-30 at 08:18 -0800, Kenny Simpson wrote:
> That's what I read in the comments too, but looking at the code I only ever see it set to
> write-back. I verified this with blktool - our controllers have no battery, and blktool showed
> the i2o-wcache state as write-back.
blktool doesn't support i2o control as far as I am aware. The blk level
generic ioctls are just too crude to control it properly.
> However, I was also told that the i2o_block driver lacks barrier support, so even in the
> write-back case, the controller won't be told to flush/sync.
Correct, but it should only ever enable this in the battery backed case.
Otherwise it uses the per command control bits to decide what mode it
wishes to use for each I/O
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
