Hi Mark,
On 07.09.17 23:43, Mark Johnston wrote:
Author: markj
Date: Thu Sep 7 21:43:39 2017
New Revision: 323290
URL: https://svnweb.freebsd.org/changeset/base/323290
Log:
Speed up vm_page_array initialization.
We currently initialize the vm_page array in three passes: one to zero
the array, one to initialize the "order" field of each page (necessary
when inserting them into the vm_phys buddy allocator one-by-one), and
one to initialize the remaining non-zero fields and individually insert
each page into the allocator.
Merge the three passes into one following a suggestion from alc:
initialize vm_page fields in a single pass, and use vm_phys_free_contig()
to efficiently insert physical memory segments into the buddy allocator.
This reduces the initialization time to a third or a quarter of what it
was before on most systems that I tested.
Reviewed by: alc, kib
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D12248
Modified:
head/sys/vm/vm_page.c
head/sys/vm/vm_phys.c
head/sys/vm/vm_phys.h
I just found out that this commit breaks booting my powerpc64 Quad G5.
It hangs, pressing ctrl-t shows: cmd: sh [*vm active pagequeue].
Sometimes it hangs earlier when the kbd is not there yet (usb), then I
can't get the process/task where it hangs.
Note, this kernel is compiled with the default gcc (4.2.1-FreeBSD)
Any ideas how to find out what's wrong?
The previous revision, r323289 seems stable, at least it survived
several kernel builds.
TIA,
Andreas
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