Jens Axboe <jens.axboe@xxxxxxxxxx> writes: > > So how does it work? Instead of punting IO to a thread and passing it > through the page cache, we instead attempt to send the IO directly to the Great -- something like this was needed for a long time. > - The file block mappings must not change while loop is using the file. > This means that we have to ensure exclusive access to the file and > this is the bit that is currently missing in the implementation. It > would be nice if we could just do this via open(), ideas welcome... get_write_access()/put_write_access() will block other writers. But as pointed out by others that is not enough for this. I suppose you could use a white list like a special flag for file systems (like ext2/ext3) that do not reallocate blocks. -Andi - 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
