On Wed, 04 May 2011 13:58:39 EDT, Josef Bacik said: > +#define SEEK_HOLE 3 /* seek to the closest hole */ > +#define SEEK_DATA 4 /* seek to the closest data */ Comments here need nearest/next fixing as well - otherwise the ext[34] crew may actually implement the commented semantics. ;) Other than that, patch 1/2 looks OK to me (not that there's much code to review), and 2/2 *seems* sane and implement the "next" semantics, though I only examined the while/if structure and am assuming the btrfs innards are done correctly. In particular, that 'while (1)' looks like it can be painful for a sufficiently large and fragmented file (think a gigabyte file in 4K chunks, producing a million extents), but I'll let a btrfs expert analyse that performance issue ;)
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