On Mon 20-06-11 16:15:33, Christoph Hellwig wrote: > i_alloc_sem has always been a bit of an odd "lock". It's the only remaining > rw_semaphore that can be released by a different thread than the one that > locked it, and it's use case in the core direct I/O code is more like a > counter given that the writers already have external serialization. > > This series removes it in favour of a simpler counter scheme, thus getting > rid of the rw_semaphore non-owner APIs as requests by Thomas, while at the > same time shrinking the size of struct inode by 160 bytes on 64-bit systems. > > The only nasty bit is that two filesystems (fat and ext4) have started > abusing the lock for their own purposes. I've added a new rw_semaphore ext4 abuse should be gone when Ted merges my rewrite of ext4_page_mkwrite()... Ted, what happened to that patch. Should I resend it? Honza -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
