advantages. First, PV entries are roughly half the size. Second, this
allocator doesn't access the paging queues, and thus it allows for the
removal of the page queues lock from this pmap.
Replace all uses of the page queues lock by a R/W lock that is private
to this pmap.
Tested by: marcel
problem with using a msgbox was one of truncation in the case of Xdialog(1)
and lack of screen real-estate (since the msgbox is not scrollable in X11
while a textbox is).
The textbox renders the text much better and is more appropriate for this
type of data display.
Approved by: adrian (co-mentor) (implicit)
requests, default to the previous 60-seconds scheduling method
unless there is any @every_second entries to conserve CPU cycles and
power.
This change also improves scheduling in the default mode by running
as close to the beginning of the minnute as possible by replacing
sleep(3) with nanosleep(2). Previously, the tasks would run anywhere
within the first second of the minute and that offset drifted back
and forth each time cron(8) was engaged.
MFC after: 1 month
- Use M_ZERO flag in malloc() rather than bzero()
- malloc() with M_NOWAIT can't return NULL so there's no need to check
Reviewed by: alc
Approved by: alc
Mark variables static where possible and place the uid/euid variables in
lp.h, so that we can compile-time enforce that these variables have the
same type.
occurs if t3_sge_alloc_qset fails and then t3_free_qset attempts to
destroy an uninitialized mutex.
Submitted by: Vijay Singh <vijju dot singh at gmail>
MFC after: 3 days
RocketRAID 4500 series.
Many thanks to HighPoint Technologies for their continued support
of FreeBSD!
Submitted by: HighPoint Technologies
MFC after: 3 days
Add a new warning -Wmissing-variable-declarations, to warn about variables
defined without a previous declaration. This is similar to
-Wmissing-prototypes, but for variables instead of functions.
on the related functionality in the runtime via the sysctl variable
net.pfil.forward. It is turned off by default.
Sponsored by: Yandex LLC
Discussed with: net@
MFC after: 2 weeks
In the old TTY layer, SIGTTIN was correctly handled like this:
while (data should be read) {
send SIGTTIN if not foreground process group
read data
}
In the new TTY layer, however, this behaviour was changed, based on a
false interpretation of the standard:
send SIGTTIN if not foreground process group
while (data should be read) {
read data
}
Correct this by pushing tty_wait_background() into the ttydisc_read_*()
functions.
Reported by: koitsu
PR: kern/173010
MFC after: 2 weeks
Machines can stall out because mbufs are low, however sometimes we won't
see "requests denied", instead we see user land processes or kernel threads
blocking waiting for mbufs because they set M_WAIT. These consumers do not
see errors, only stalling.
Unfortunately until now, netstat did not export this information
so you could have experienced an mbuf shortage and have no way of
seeing it unless you happen to run netstat at the exact time of the
shortage and see "in use" = "max".
By exporting the number of times processes are blocked, we can
effectively see how often non-interrupt context threads are effectively
"denied".
MFC after: 2 weeks
