kernel-packages team mailing list archive

[Martin Pitt <martin.pitt@xxxxxxxxxx>]

Abhishek Gupta, did you really quote the right mails? Because those
mails are just proving my point, it makes no sense to have an
unconditional userspace rule which is just there to always enable new
memory. To the contrary, as this is always going to involve more memory
allocation (like it might spawn a new udev worker), it's much more prone
to fail in userspace than in kernel space. This would make more sense
if, as the thread suggests, you want to pre-add memory without
activating it yet (I have no idea why this would be useful, but I don't
claim to have a full understanding of all the use cases here), but then
we shouldn't have that udev rule.

> Please include the memory hotadd patch

That's another kernel patch not yet covered by the initial set of three
(which should already be in precise)?

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https://bugs.launchpad.net/bugs/1233466

Title:
  Hot-Add Memory failing for lack of udev rule

Status in “linux” package in Ubuntu:
  Fix Released
Status in “systemd” package in Ubuntu:
  In Progress

Bug description:
  It appears that the Hot-Add mechanism is not working because of lack
  of a udev rule. The required rule is attached to this bug. Please
  include it.

  Furthermore, please ensure that the following patches are included:

  https://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/drivers/hv?id=20138d6cb838aa01bb1b382dcb5f3d3a119ff2cb

  https://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/drivers/hv?id=c5e2254f8d63a6654149aa32ac5f2b7dd66a976d

  https://git.kernel.org/cgit/linux/kernel/git/next/linux-
  next.git/commit/drivers/hv?id=ed07ec93e83ec471d365ce084e43ad90fd205903

  The above patches should be in but just wanted to ensure that you guys
  got these.

  Thanks again for the great last minute help.
  Abhishek

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