amount of free memory was close to the point at which we would begin
reclaiming pages. Now, we continuously scan the active page queue,
regardless of the amount of free memory. Consequently, we are continuously
calling pmap_ts_referenced() on active pages.
Prior to this change, pmap_ts_referenced() would always demote superpage
mappings in order to obtain finer-grained reference information. This made
sense because we were coming under memory pressure and would soon have to
begin reclaiming pages. Now, however, with continuous scanning of the
active page queue, these demotions are taking a toll on performance. For
example, on one of my test machines, the running time for the HPCC Random
Access benchmark (also known as GUPS) has increased by 54%. To address this
problem, I have replaced the demotion with a heuristic for periodically
clearing the reference flag on superpage mappings.
Reviewed by: kib
Approved by: re (glebius)
Sponsored by: EMC / Isilon Storage Division
pmap_remove_all(). Not doing the drain allows the pmap_enter() to
proceed in parallel, making the pmap_remove_all() effects void.
The race results in an invalidated page mapped wired by usermode.
Reported and tested by: pho
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
Approved by: re (glebius)
except to document the hardcoded standard library search path for 32-bit
binaries. The third line performs the equivalent substitution for the
private library directory.
Ironically, these entries rely on functionality which is only available
in the COMPAT_32BIT version of rtld-elf.
Approved by: re (blanket)
we don't want to expose but which can't or shouldn't be static.
To mark a library as private, define PRIVATELIB in its Makefile. It
will be installed in LIBPRIVATEDIR, which is normally /usr/lib/private
(or /usr/lib32/private for 32-bit libraries on 64-bit platforms).
To indicate that a program or library depends on a private library,
define USEPRIVATELIB in its Makefile. The correct version of
LIBPRIVATEDIR will be added to its run-time library search path.
Approved by: re (blanket)
Pass the pointy hat please.
Also unblock the software (Yarrow) generator for now. This will be
reverted; Yarrow needs to block until secure, not this behaviour
of serving as soon as asked.
Folks with specific requiremnts will be able to (can!) unblock this
device with any write, and are encouraged to do so in /etc/rc.d/*
scripting. ("Any" in this case could be "echo '' > /dev/random" as
root).
Changes are to
- update board and network interface detection logic
- fix reading onboard CPLD in little-endian config
- print NAE frequency conrrectly for Bx chips
- update XAUI config to disable Rx/Tx until interface is up
Submitted by: Venkatesh J V <venkatesh.vivekanandan@broadcom.com>
Use a variant of mips libc memcpy for kernel. This implementation uses
64-bit operations when compiled for 64-bit, and is significantly faster
in that case.
Submitted by: Tanmay Jagdale <tanmayj@broadcom.com>
ffsl() implementation, when it is available, instead of homegrown iteration.
On dual-E5645 amd64 system (2x6x2 cores) under heavy I/O load that reduces
time spent inside cpu_search() from 19% to 13%, while IOPS increased by 5%.
the rest by me.
o Namespace cleanup; the Yarrow name is now restricted to where it
really applies; this is in anticipation of being augmented or
replaced by Fortuna in the future. Fortuna is mentioned, but behind
#if logic, and is ignorable for now.
o The harvest queue is pulled out into its own modules.
o Entropy harvesting is emproved, both by being made more conservative,
and by separating (a bit!) the sources. Available entropy crumbs are
marginally improved.
o Selection of sources is made clearer. With recent revelations,
this will receive more work in the weeks and months to come.
Submitted by: Arthur Mesh (partly) <arthurmesh@gmail.com>
dev_ref() in the clone handlers that still use it.
- Don't set SI_CHEAPCLONE flag, it's not used anywhere neither in devfs
(for anything real)
Reviewed by: kib
IMAN register to clear the pending interrupt status bits. This patch
tries to solve problems seen on the MacBook Air, as reported by
Johannes Lundberg <johannes@brilliantservice.co.jp>
MFC after: 1 week
The fields from deMTime and deMDate in the DOS directory entry
are actually the last-modified time/date.
According to some online documentation these are the only
timestamps available in FAT12/FAT16.
MFC after: 3 days
