15.07.2016 19:29, Chris Mason пишет: > >> However I have to point out that this kind of test is very >> difficult to do: the file-cache could lead to read an old data, so please >> suggestion about how flush the cache are good (I do some sync, >> unmount the filesystem and perform "echo 3 >/proc/sys/vm/drop_caches", >> but sometime it seems not enough). > > O_DIRECT should handle the cache flushing for you. > There is also BLKFLSBUF ioctl (blockdev --flushbufs on shell level). -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
