On 04/20/2012 09:48 AM, Maxim V. Patlasov wrote: > On 03/30/2012 07:43 PM, Dave Kleikamp wrote: >> From: Zach Brown<zab@xxxxxxxxx> >> >> This uses the new kernel aio interface to process loopback IO by >> submitting concurrent direct aio. Previously loop's IO was serialized >> by synchronous processing in a thread. >> > > The patch ignores REQ_FLUSH bit of bi_rw. Is it simply overlook? Good question. Since the loop device is sending only direct IO requests, it shouldn't be necessary to explicitly flush page cache, but REQ_FLUSH also guarantees that previous writes make it to media before the current write, so it looks like I need to add an explicit vfs_fsync() in the new path (conditional on REQ_FLUSH of course). Zach, thoughts? Shaggy > > Thanks, > Maxim -- 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
