Introduce CONFIG_LEAF_DIR, SUBSYS_DIR, INITD_DIR variables to cope
better with variation between distributions.
See docs/misc/distro_mapping.txt for details.
Signed-off-by: Bruce Edge <bruce.edge@gmail.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
"Default-Enabled:" is not a LSB keyword.
Remove it from the LSB section.
This avoids an openSuSE buildcheck warning and we are not aware of any
reason why it should be kept.
From: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Modified-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
and monitor tool
This patch adds tmem support to the largely unknown/unused
xenballoond scripts that implement both self-ballooning and
a foundation for directed-ballooning. Tmem and automated
ballooning are highly complementary in that, when ballooning
is over-aggressive, paging and swapping can increase noticably.
Precache preserves evicted pages that may be needed again soon
(thus eliminating disk reads) and preswap provides memory-based
swapping that occurs if ballooning is insufficiently responsive
to a sudden increase in activity and memory demand (thus
eliminating disk writes and reads).
There are two changes in this patch:
1) The xenballoond service is a convenient place to implement
userland "preswap shrinking".**
2) The xenballoon-monitor script is a convenient place to
report (and view with "watch -d") the frequent memory
rebalancing that results from tmem usage on a busy system.
Note that for best results (and for the monitor script to
work), the xenstore-* tools should be installed on each guest.
(** In a disk-based swap device, stale pages are often left
on-disk even after they are no longer needed or valid; they
are simply overwritten if/when the disk blocks are needed
again, which may be a very long time. Preswap behaves
much like a disk, but uses precious pages of memory that
count against a guest's memory allocation; thus stale
pages are very undesirable. Preswap shrinking periodically
attempts to remove stale pages from preswap by using a
sysfs interface created by the linux-side tmem patch.)
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Ian Jackson
Olaf Hering
Keir Fraser