uses of the page queues mutex with a new rwlock that protects the page
table and the PV lists. This reduces system time during a parallel
buildworld by 35%.
Reviewed by: alc
within the BAW.
This regression was introduced in ane earlier commit by me to fix the
BAW seqno allocation-but-not-insertion-into-BAW race. Since it was only
ever using the to-be allocated sequence number, any frame retries
with the first frame in the BAW still in the software queue would
have constantly failed, as ni_txseqs[tid] would always be outside
the BAW.
TODO:
* Extract out the mostly common code here in the agg and non-agg ADDBA
case and stuff it into a single function.
PR: kern/166357
pam_exec(8) now accepts a new option "return_prog_exit_status". When
set, the program exit status is used as the pam_exec return code. It
allows the program to tell why the step failed (eg. user unknown).
However, if it exits with a code not allowed by the calling PAM service
module function (see $PAM_SM_FUNC below), a warning is logged and
PAM_SERVICE_ERR is returned.
The following changes are related to this new feature but they apply no
matter if the "return_prog_exit_status" option is set or not.
The environment passed to the program is extended:
o $PAM_SM_FUNC contains the name of the PAM service module function
(eg. pam_sm_authenticate).
o All valid PAM return codes' numerical values are available
through variables named after the return code name. For instance,
$PAM_SUCCESS, $PAM_USER_UNKNOWN or $PAM_PERM_DENIED.
pam_exec return code better reflects what went on:
o If the program exits with !0, the return code is now
PAM_PERM_DENIED, not PAM_SYSTEM_ERR.
o If the program fails because of a signal (WIFSIGNALED) or doesn't
terminate normally (!WIFEXITED), the return code is now
PAM_SERVICE_ERR, not PAM_SYSTEM_ERR.
o If a syscall in pam_exec fails, the return code remains
PAM_SYSTEM_ERR.
waitpid(2) is called in a loop. If it returns because of EINTR, do it
again. Before, it would return PAM_SYSTEM_ERR without waiting for the
child to exit.
Several log messages now include the PAM service module function name.
The man page is updated accordingly.
Reviewed by: gleb@, des@
Sponsored by: Yakaz (http://www.yakaz.com)
MFC after: 2 weeks
Function acquired reader lock if needed.
Assert check for reader or writer lock (RA_LOCKED / RA_UNLOCKED)
- While here, add knlist_init_mtx.9 to MLINKS and fix some style(9) issues
Reviewed by: glebius
Approved by: ae(mentor)
MFC after: 2 weeks
I see traffic stalls.
It turns out that the bug isn't because the first and last frame in the
BAW is in the software queue. It is more likely that it's because
the first frame in the BAW is still in the software queue and thus there's
no more room to allocate and do subsequent TX.
PR: kern/166357
net.inet.ip.fw.tables_max is now read-write.
- Bump IPFW_TABLES_MAX to 65535
Default number of tables is still 128
- Remove IPFW_TABLES_MAX from ipfw(8) code.
Sponsored by Yandex LLC
Approved by: kib(mentor)
MFC after: 2 weeks
XenServer configurations that advertise the multi-page ring extension,
but only allow a single page of ring space.
sys/dev/xen/blkfront/blkfront.c:
If only one page of ring space is being used, do not publish
in the XenStore the number of pages in use (1), via either
of the supported multi-page ring extension schemes.
Single page operation is the same with or without the
ring-page extension being negotiated. Relying on the
legacy behavior avoids an incompatible difference in how
the two ring-page extension schemes that are out in the
wild, deal with the base case of a single page. The
Amazon/Red Hat drivers use the same XenStore variable as
if the extension was not negotiated. The Citrix drivers
assume the new ring reference XenStore variables will be
available
Reported by: Oliver Schonefeld <schonefeld@ids-mannheim.de>
MFC after: 3 days
This is not entirely correct as it simply resets the channel, flushing
whatever is in the TX/RX queue. This can and will break aggregation
BAW tracking. But the alternative (HT40 frames being sent with the hardware
in HT20 mode) is even worse.
There's still a small window between the htinfo being received (and the ni_chw
field being updated) which could cause problems. I'll look at fleshing this
out in follow-up commits.
PR: kern/166286
Currently, a channel width change updates the 802.11n HT info data in
net80211 but it doesn't trigger any device changes. So the device
driver may decide that HT40 frames can be transmitted but the last
device channel set only had HT20 set.
Now, a task is scheduled so a hardware reset or change isn't done
during any active ongoing RX. It also means that it's serialised
with the other task operations (eg channel change.)
This isn't the final incantation of this work, see below.
For now, any unmodified drivers will simply receive a channel
change log entry. A subsequent patch to ath(4) will introduce
some basic channel change handling (by resetting the NIC.)
Other NICs may need to update their rate control information.
TODO:
* There's still a small window at the present moment where the
channel width has been updated but the task hasn't been fired.
The final version of this should likely pass in a channel width
field to the driver and let the driver atomically do whatever
it needs to before changing the channel.
PR: kern/166286
- Rename pmc.mips to pmc.mips24k since it covers just one CPU,
no whole architecture
- Add documetnations for Octeon's PMC counters
- Remove CAVEATS section from pmc.mips24k page: PMC for MIPS supports
sampling now.
- Updates to various locations in Antarctica.
- Armenia will abolish DST this year.
- Not only Samoa has moved to UTC+14, also Fakaofo did.
- There will be a leap second in 30 June 2012.
- Historical updates of 1918 to Canada, Winn, Regina, Edm, Vanc, Creston.
- Chili stays on DST until 28 April 2012
- The Falkland islands will stay on DST this year.
Update to 2012a
- Updates to various locations in Antarctica.
- Armenia will abolish DST this year.
- Not only Samoa has moved to UTC+14, also Fakaofo did.
- There will be a leap second in 30 June 2012.
- Historical updates of 1918 to Canada, Winn, Regina, Edm, Vanc, Creston.
- Chili stays on DST until 28 April 2012
- The Falkland islands will stay on DST this year.
Obtained from: ftp://ftp.iana.org/tz/releases/
- Add an examples file with many of the not accepted suggestions from the discussion
PR: conf/160689
Reviewed by: many
Discussed on: current
Approved by: cperciva
