On Tuesday 28 July 2015 16:44:19 Pavel Machek wrote: > On Sun 2015-06-21 13:20:34, Pali Rohár wrote: > > This patch adds dm message commands and option strings to optionally wipe key > > from dm-crypt device before entering suspend or hibernate state. > > > > Before key is wiped dm device must be suspended. To prevent race conditions with > > I/O and userspace processes, wiping action must be called after processes are > > freezed. Otherwise userspace processes could start reading/writing to disk after > > dm device is suspened and freezing processes before suspend/hibernate action > > will fail. > > Are you sure this is enough? > > We still may need to allocate memory after userspace is frozen, and > that could mean writing dirty buffers out to make some memory free... > > Pavel > Hm... good question. Maybe it is needed to also flush all buffers? -- Pali Rohár pali.rohar@xxxxxxxxx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
