On Thu, Jan 16, 2014 at 09:07:21AM +1100, Dave Chinner wrote: > Yes, I think it can be done relatively simply. We'd have to change > the code in xfs_file_aio_write_checks() to check whether EOF zeroing > was required rather than always taking an exclusive lock (for block > aligned IO at EOF sub-block zeroing isn't required),
That's not even required for supporting aio appends, just a further optimization for it. > and then we'd > have to modify the direct IO code to set the is_async flag > appropriately. We'd probably need a new flag to say tell the DIO > code that AIO beyond EOF is OK, but that isn't hard to do.... Yep, need a flag to allow appending writes and then defer them. > Christoph, are you going to get any time to look at doing this in > the next few days? I'll probably need at least another week before I can get to it. If you wanna pick it up before than feel free. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
