Miklos, I implemented freeze/thaw of overlayfs, because I need it for overlay snapshots (CoW decision is made before mnt_wat_write(upper) and I need to serialize it with snapshot take). Not sure if there are other use cases for overlayfs freeze?? Tested freeze stress with xfstest generic/068 generic/390. While staring at the code, I realized that syncfs(2) for overlayfs seems broken. It looks like only inodes are synced and upper fs metadata is not being flushed, but I could be wrong. Tested sync sanity with -g quick (although no test calls syncfs directly). Tested the usual unionmount sanity over xfs and over tmpfs. I am not sure exactly how to write a test case to verify this alleged breakage? Jan, Can you please have a look? Thanks, Amir. Amir Goldstein (2): ovl: support freeze/thaw super ovl: properly implement sync_filesystem() fs/overlayfs/super.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
