On Fri, 15 Jul 2016, Navin P.S wrote: > Resend .. > > On Thu, Jul 14, 2016 at 7:55 PM, Navin P.S <navinp1912@xxxxxxxxx> wrote: > > Hi, > > Can i do dd if=/dev/zero of=/dev/mapper/dmo count=20 ? where dmo is > > a dm snapshot origin created through dmsetup command. Instead of > > /dev/zero i can write valid devices. > > > > I could create the dmo through some lvm2 commands. lvcreate -s > > Is direct write > > with 4k (page size values ) allowed when it is mapped to 2 block > > devices in linear mode ? > > > > > > Regards, > > -- Navin > > I'm seeing OOM followed by reboot of host machine. > Does this mean this device cannot to exported to containers for writing ? The snapshot driver requires 32 bytes of memory for one chunk (the chunk size is selected with the "-c" switch to lvcreate). You should set system memory according to that. Mikulas > -- Navin > -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
