> Are origin devices readonly ? > > When i do dd if=/dev/zero of=/dev/mapper/ff count=10, it kills all the > process says OOM. > > How do you go about debugging this ? I'm running 4.7.0-rc7+ . Find some older kernel where this worked. Use the git bisect tool on the kernel tree to find out which patch broke it. Mikulas > root@vm-xenial-foo:~# dmsetup info > Name: cryptie4-ff > State: ACTIVE > Read Ahead: 256 > Tables present: LIVE > Open count: 0 > Event number: 0 > Major, minor: 251, 0 > Number of targets: 2 > > Name: ff > State: ACTIVE > Read Ahead: 256 > Tables present: LIVE > Open count: 0 > Event number: 0 > Major, minor: 251, 1 > Number of targets: 1 > > root@vm-xenial-foo:~# dmsetup status > cryptie4-ff: 0 102400 linear > cryptie4-ff: 102400 122880 linear > ff: 0 102400 snapshot-origin > root@vm-xenial-foo:~# > > > > > free -m > total used free shared buff/cache available > Mem: 7762 2178 3720 358 1864 4920 > Swap: 19145 0 19145 > > > -- > -- Navin > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
