On Wed, Apr 22, 2015 at 04:26:51PM +0200, Matias Bj??rling wrote: > In preparation for Open-Channel SSDs. We introduce a special request for > open-channel ssd targets that must perform garbage collection. > > Requests are divided into two types. The user and target specific. User > IOs are from fs, user-space, etc. While target specific are IOs that are > issued in the background by targets. Usually garbage collection actions. > > For the target to issue garbage collection requests, it is a requirement > that a logical address is locked over two requests. One read and one > write. If a write to the logical address comes in from user-space, a > race-condition might occur and garbage collection will write out-dated > data. > > By introducing this flag, the target can manually control locking of > logical addresses. Seems like this should be a new ->cmd_type instead of a flag. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
