On Wed, Dec 2, 2015 at 8:38 PM, Phil Turmel <philip@xxxxxxxxxx> wrote: > On 12/02/2015 09:33 PM, Dallas Clement wrote: > >> I'm not sure that the sync=1 has any effect in this case where I've >> got direct=1 set (for non buffered I/O). I think the sync=1 flag only >> matters for buffered I/O. I really shouldn't be setting that flag at >> all. > > It's substantially different from direct=1. O_DIRECT just bypasses the > kernel's caches. O_SYNC flushes the file data and filesystem metadata, > and kills the device caches and queues. Isn't O_SYNC only applicable for buffered I/O or going through the kernel caches? If I'm using O_DIRECT, seems like it should just ignore this flag. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
