lkml.org 
[lkml]   [2019]   [Dec]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v4 0/2] xenbus/backend: Add a memory pressure handler callback
Date
Granting pages consumes backend system memory.  In systems configured
with insufficient spare memory for those pages, it can cause a memory
pressure situation. However, finding the optimal amount of the spare
memory is challenging for large systems having dynamic resource
utilization patterns. Also, such a static configuration might lacks a
flexibility.

To mitigate such problems, this patchset adds a memory reclaim callback
to 'xenbus_driver' (patch 1) and use it to mitigate the problem in
'xen-blkback' (patch 2).

Base Version
------------

This patch is based on v5.4. A complete tree is also available at my
public git repo:
https://github.com/sjp38/linux/tree/blkback_squeezing_v4


Patch History
-------------

Changes from v3 (https://lore.kernel.org/xen-devel/20191209085839.21215-1-sjpark@amazon.com/)
- Add general callback in xen_driver and use it (suggested by Juergen
Gross)

Changes from v2 (https://lore.kernel.org/linux-block/af195033-23d5-38ed-b73b-f6e2e3b34541@amazon.com)
- Rename the module parameter and variables for brevity (aggressive
shrinking -> squeezing)

Changes from v1 (https://lore.kernel.org/xen-devel/20191204113419.2298-1-sjpark@amazon.com/)
- Adjust the description to not use the term, `arbitrarily` (suggested
by Paul Durrant)
- Specify time unit of the duration in the parameter description,
(suggested by Maximilian Heyne)
- Change default aggressive shrinking duration from 1ms to 10ms
- Merge two patches into one single patch

SeongJae Park (1):
xen/blkback: Squeeze page pools if a memory pressure is detected

drivers/block/xen-blkback/blkback.c | 35 +++++++++++++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)

SeongJae Park (2):
xenbus/backend: Add memory pressure handler callback
xen/blkback: Squeeze page pools if a memory pressure is detected

drivers/block/xen-blkback/blkback.c | 23 +++++++++++++++--
drivers/block/xen-blkback/common.h | 1 +
drivers/block/xen-blkback/xenbus.c | 3 ++-
drivers/xen/xenbus/xenbus_probe_backend.c | 31 +++++++++++++++++++++++
include/xen/xenbus.h | 1 +
5 files changed, 56 insertions(+), 3 deletions(-)

--
2.17.1

\
 
 \ /
  Last update: 2019-12-09 20:44    [W:0.063 / U:3.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site