2011-05-22 11:52:37 +0200, Tomasz Chmielewski: [...] > Can you try running these commands yourself: > > iostat -k 1 </your/btrfs/device> > > > And in a second terminal: > > while true; do sync ; done > > > To see if your btrfs makes writes on sync each time? [...]
Yes it does. And I see: <7>[38554.244219] sync(3354): dirtied inode 1 (?) on dm-11 <7>[38554.244740] btrfs-submit-0(29134): WRITE block 301128 on dm-11 (56 sectors) <7>[38554.244774] btrfs-submit-0(29134): WRITE block 741832 on dm-11 (56 sectors) <7>[38554.249963] sync(3354): WRITE block 128 on dm-11 (8 sectors) <7>[38554.250010] sync(3354): WRITE block 131072 on dm-11 (8 sectors) <7>[38567.312908] sync(3356): dirtied inode 1 (?) on dm-11 <7>[38567.313330] btrfs-submit-0(29134): WRITE block 301256 on dm-11 (24 sectors) <7>[38567.313350] btrfs-submit-0(29134): WRITE block 741960 on dm-11 (24 sectors) <7>[38567.313358] btrfs-submit-0(29134): WRITE block 301288 on dm-11 (24 sectors) <7>[38567.313366] btrfs-submit-0(29134): WRITE block 741992 on dm-11 (24 sectors) <7>[38567.313393] btrfs-submit-0(29134): WRITE block 301312 on dm-11 (8 sectors) <7>[38567.313403] btrfs-submit-0(29134): WRITE block 742016 on dm-11 (8 sectors) <7>[38567.325194] sync(3356): WRITE block 128 on dm-11 (8 sectors) <7>[38567.325244] sync(3356): WRITE block 131072 on dm-11 (8 sectors) <7>[38570.374449] sync(3358): dirtied inode 1 (?) on dm-11 <7>[38570.374976] btrfs-submit-0(29134): WRITE block 301128 on dm-11 (56 sectors) <7>[38570.375011] btrfs-submit-0(29134): WRITE block 741832 on dm-11 (56 sectors) <7>[38570.379221] sync(3358): WRITE block 128 on dm-11 (8 sectors) <7>[38570.379272] sync(3358): WRITE block 131072 on dm-11 (8 sectors) <7>[38572.170816] sync(3359): dirtied inode 1 (?) on dm-11 <7>[38572.171289] btrfs-submit-0(29134): WRITE block 301256 on dm-11 (24 sectors) <7>[38572.171300] btrfs-submit-0(29134): WRITE block 741960 on dm-11 (24 sectors) <7>[38572.171304] btrfs-submit-0(29134): WRITE block 301288 on dm-11 (24 sectors) <7>[38572.171308] btrfs-submit-0(29134): WRITE block 741992 on dm-11 (24 sectors) <7>[38572.171320] btrfs-submit-0(29134): WRITE block 301312 on dm-11 (8 sectors) <7>[38572.171325] btrfs-submit-0(29134): WRITE block 742016 on dm-11 (8 sectors) <7>[38572.180338] sync(3359): WRITE block 128 on dm-11 (8 sectors) <7>[38572.180386] sync(3359): WRITE block 131072 on dm-11 (8 sectors) <7>[38574.186559] sync(3360): dirtied inode 1 (?) on dm-11 <7>[38574.187090] btrfs-submit-0(29134): WRITE block 301128 on dm-11 (56 sectors) <7>[38574.187125] btrfs-submit-0(29134): WRITE block 741832 on dm-11 (56 sectors) <7>[38574.191602] sync(3360): WRITE block 128 on dm-11 (8 sectors) <7>[38574.191654] sync(3360): WRITE block 131072 on dm-11 (8 sectors) <7>[38576.370003] sync(3361): dirtied inode 1 (?) on dm-11 <7>[38576.370452] btrfs-submit-0(29134): WRITE block 301256 on dm-11 (24 sectors) <7>[38576.370470] btrfs-submit-0(29134): WRITE block 741960 on dm-11 (24 sectors) <7>[38576.370478] btrfs-submit-0(29134): WRITE block 301288 on dm-11 (24 sectors) <7>[38576.370485] btrfs-submit-0(29134): WRITE block 741992 on dm-11 (24 sectors) <7>[38576.370513] btrfs-submit-0(29134): WRITE block 301312 on dm-11 (8 sectors) <7>[38576.370523] btrfs-submit-0(29134): WRITE block 742016 on dm-11 (8 sectors) <7>[38576.379718] sync(3361): WRITE block 128 on dm-11 (8 sectors) <7>[38576.379766] sync(3361): WRITE block 131072 on dm-11 (8 sectors) Every other sync the same. -- Stephane -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
