Commit Graph

6 Commits

Author SHA1 Message Date
Konstantin Belousov
89d2fb14d5 Add interruptible variant of vm_wait(9), vm_wait_intr(9).
Also add msleep flags argument to vm_wait_doms(9).

Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D24652
2020-09-08 23:28:09 +00:00
Mark Johnston
4c29d2de67 Refactor domainset iterators for use by malloc(9) and UMA.
Before this change we had two flavours of vm_domainset iterators: "page"
and "malloc".  The latter was only used for kmem_*() and hard-coded its
behaviour based on kernel_object's policy.  Moreover, its use contained
a race similar to that fixed by r338755 since the kernel_object's
iterator was being run without the object lock.

In some cases it is useful to be able to explicitly specify a policy
(domainset) or policy+iterator (domainset_ref) when performing memory
allocations.  To that end, refactor the vm_dominset_* KPI to permit
this, and get rid of the "malloc" domainset_iter KPI in the process.

Reviewed by:	jeff (previous version)
Tested by:	pho (part of a larger patch)
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17417
2018-10-23 16:35:58 +00:00
Mark Johnston
93db904d19 Use an unsigned iterator for domain sets.
Otherwise (iter % ds->ds_cnt) is not guaranteed to lie in the range
[0, MAXMEMDOM).

Reported by:	pho
Reviewed by:	kib
Approved by:	re (rgrimes)
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17374
2018-10-01 18:51:39 +00:00
Mark Johnston
23984ce5cd Avoid resource deadlocks when one domain has exhausted its memory. Attempt
other allowed domains if the requested domain is below the minimum paging
threshold.  Block in fork only if all domains available to the forking
thread are below the severe threshold rather than any.

Submitted by:	jeff
Reported by:	mjg
Reviewed by:	alc, kib, markj
Approved by:	re (rgrimes)
Differential Revision:	https://reviews.freebsd.org/D16191
2018-09-06 19:28:52 +00:00
Jeff Roberson
e5818a53db Implement several enhancements to NUMA policies.
Add a new "interleave" allocation policy which stripes pages across
domains with a stride or width keeping contiguity within a multi-page
region.

Move the kernel to the dedicated numbered cpuset #2 making it possible
to assign kernel threads and memory policy separately from user.  This
also eliminates the need for the complicated interrupt binding code.

Add a sysctl API for viewing and manipulating domainsets.  Refactor some
of the cpuset_t manipulation code using the generic bitset type so that
it can be used for both.  This probably belongs in a dedicated subr file.

Attempt to improve the include situation.

Reviewed by:	kib
Discussed with:	jhb (cpuset parts)
Tested by:	pho (before review feedback)
Sponsored by:	Netflix, Dell/EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D14839
2018-03-29 02:54:50 +00:00
Jeff Roberson
7b11a48326 Add files for r327895
Implement 'domainset', a cpuset based NUMA policy mechanism.  This allows
userspace to control NUMA policy administratively and programmatically.

Implement domainset based iterators in the page layer.

Remove the now legacy numa_* syscalls.

Cleanup some header polution created by having seq.h in proc.h.

Reviewed by:  markj, kib
Discussed with:       alc
Tested by:    pho
Sponsored by: Netflix, Dell/EMC Isilon
Differential Revision:        https://reviews.freebsd.org/D13403
2018-01-12 22:57:57 +00:00