On Wed, Dec 24, 2014 at 07:35:49PM +0100, Rolf Fokkens wrote: > Hi all, > > On the linux-bcache mailing list the potential issue was brought up > about writes to backing or caching device after bringing up devices > in initramdisk, but prior to an actual resume. The actual issue is > that there should be no writes between hibernation and resume: > > http://www.spinics.net/lists/linux-bcache/msg02692.html > > If this is an issue for bcache, I can imagine it also is for other > caching solutions like dm-cache and dm-writeboost. I'm not an expert > on this, but from my user perspective it seems somewhat concerning > (for both bcache and the DM caching solutions) and an expert view on > this might be needed. Thanks for bringing this to our attention. I think dm-cache provides the neccessary tools to do this; either setting the migration threshold to zero, or switch to write through mode for the duration of the hibernate. But atm this would need to be triggered from userland. I need to look at hibernate more. - Joe -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
