Re: [PATCH] Memory management livelock

[Alasdair G Kergon]

On Fri, Oct 03, 2008 at 10:31:03PM +1000, Nick Piggin wrote:
> On Friday 03 October 2008 21:26, Mikulas Patocka wrote:
> > LVM does (that is where the bug was discovered). Basically, it scans all
> > the block devices with direct IO and if someone else does buffered IO on
> > any device simultaneously, it locks up.
> Scans all block devices with direct IO? Hmm, why, I wonder? Should
> really consider using buffered (posix_fadvise to readahead/dropbehind).
 
Scan in the sense of it reading a few sectors from each potential LVM
device to check whether it contains an LVM label.

Alasdair
-- 
agk@xxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/