[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v3 0/7] CPU unplug timeout/LMB unplug cleanup in DRC reconfigurat
From: |
Daniel Henrique Barboza |
Subject: |
[PATCH v3 0/7] CPU unplug timeout/LMB unplug cleanup in DRC reconfiguration |
Date: |
Thu, 11 Feb 2021 19:52:39 -0300 |
Hi,
This is marked as a v3 as it started as a result of discussions that
followed the v2 [1].
The idea with this series is to add CPU hotunplug timeout to avoid the
situations where the kernel refuses to release the CPU. The reasoning
for a timeout approach is described in patch 05.
While investigating putting a timeout in memory hotunplug, I have found
out that we have a way to determine, at least in some cases, when the kernel
refuses to release the DIMM during a memory hotunplug. This alleviate one
of the most common issues (at least AFAIK) with memory hotunplug and it
made me gave up attempting to put a timeout in memory hotunplug altogether.
At this point I didn't add timeouts for PCI hotunplug operations, but it
is trivial to do so if desirable.
The series goes as follows:
- Patches 1-4: DRC simplifications/cleanups. The idea with these
cleanups were to trim the spapr_drc_detach use as much as possible,
since the function would be used to start the timeout timer
- Patch 5: timeout timer infrastructure
- Patch 6: add cpu unplug timeout
- Patch 7: reset DIMM unplug state when the kernel reconfigures the DRC
connector
v2 link: [1] https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg04400.html
Daniel Henrique Barboza (7):
spapr_drc.c: do not call spapr_drc_detach() in drc_isolate_logical()
spapr_pci.c: simplify spapr_pci_unplug_request() function handling
spapr_drc.c: use spapr_drc_release() in isolate_physical/set_unusable
spapr: rename spapr_drc_detach() to spapr_drc_unplug_request()
spapr_drc.c: introduce unplug_timeout_timer
spapr_drc.c: add hotunplug timeout for CPUs
spapr_drc.c: use DRC reconfiguration to cleanup DIMM unplug state
hw/ppc/spapr.c | 40 ++++++++++++-
hw/ppc/spapr_drc.c | 116 +++++++++++++++++++++++++++----------
hw/ppc/spapr_pci.c | 44 +++++---------
hw/ppc/trace-events | 2 +-
include/hw/ppc/spapr.h | 2 +
include/hw/ppc/spapr_drc.h | 7 ++-
6 files changed, 147 insertions(+), 64 deletions(-)
--
2.29.2
- [PATCH v3 0/7] CPU unplug timeout/LMB unplug cleanup in DRC reconfiguration,
Daniel Henrique Barboza <=
[PATCH v3 3/7] spapr_drc.c: use spapr_drc_release() in isolate_physical/set_unusable, Daniel Henrique Barboza, 2021/02/11