LWN.net Logo  A few words on DRBD and user space - kernel
interfaces  A few words on DRBD and user space - kernel
interfaces  Posted Oct 8, 2009 23:36 UTC (Thu) by neilbrown
(subscriber, #359) In reply to: A few words on DRBD and user
space - kernel interfaces by philipp Parent article:
Infrastructure unification in the block layer  Hi Phillipp,
thanks for the extra historical background on DRBD. It does
serve to highlight that getting interfaces "right" really is
hard.  I don't believe configfs is a useful answer for anything.
I believe the supposed distinction between it and sysfs is an
imaginary distinction. It is a bit like the distinction between
DM and MD - superficially different but fundamentally the same.
I think 'transaction semantics' a quite achievable in sysfs - I
have them for some aspects of MD. The basic idea is that
updating some attributes is not immediately effective, but
requires a write to a 'commit' attribute.  E.g. I can change the
layout, chunksize, and/or the number of devices in a R