On 6.03.2018 12:53, Qu Wenruo wrote: > > [snip]
> It breaks the rule that we shouldn't have the hole in file extents. > > IIRC Nikolay is trying to use inode_lock_shared() to solve this race. > Unfortunately the inode_lock_shared approach is a no go since Filipe objected to it quite adamantly. After discussion that happened in that thread I can say I'm almost convinced that the pair of READDIO_LOCK and setsize *do* provide necessary consistency for the DIO case. However at the moment there is a memory barrier missing. But I think the DIO case is unrelated to the issue you are discussing here, no ? [snip] -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
