gcc is using. This fixes devstat consumers (like vmstat, iostat,
systat) so they don't print crazy zillion digit numbers for
disk transfers and bandwidth.
According to gcc, long doubles are 64-bits, rather than 128 bits
like the SVR4 ABI spec wants them to be.. Note that MacOSX also treats
long doubles as 64-bits, and not 128 bits, so we are in good company.
Reviewed by: das
Approved by: grehan
1) data to be sent to the right of snd_recover.
2) send more data then whats in the send buffer.
The fix is to postpone sack retransmit to a subsequent recovery episode
if the current retransmit pointer is beyond snd_recover.
Thanks to Mohan Srinivasan for helping fix the bug.
Submitted by:Daniel Lang
usbdi.c rev. 1.104, author: mycroft
ugen_isoc_rintr() may recycle the xfer immediately. Therefore, we
avoid touching the xfer after calling the callback in
usb_transfer_complete(). From PR 25960.
allocated as "no object" pages. Similar changes were made to the amd64
and i386 pmap last year. The primary reason being that maintaining
a pte object leads to lock order violations. A secondary reason being
that the pte object is redundant, i.e., the page table itself can be
used to lookup page table pages. (Historical note: The pte object
predates our ability to allocate "no object" pages. Thus, the pte
object was a necessary evil.)
- Unconditionally check the vm object lock's status in vm_page_remove().
Previously, this assertion could not be made on Alpha due to its use
of a pte object.
to not get a page fault if he has not defined a dump device.
Panic can often not do a dump as it can hang forever in some cases.
The original PR was for amd64 only. This is a generalised version of
that change.
PR: amd64/67712
Submitted by: wjw@withagen.nl <Willen Jan Withagen>
a fast interrupt handler doing an swi_sched(). This fixed the lockups I
saw on my laptop when using xmms in KDE and on rwatson's MySQL benchmarks
on SMP. This will eventually be removed and/or modified when I figure out
what the root cause is and fix that.
Replace the use of '=' in conditionals in the examples
by the more correct '=='.
Clarify the example explaining that .for expansion takes place before
.if handling by showing the correct code instead of saying 'the other
way around'. Change a variable name there so the example is more parseable
to the human reader.
PR: docs/65400
Submitted by: Roman Neuhauser <neuhauser@chello.cz>
to the ARM port. We set FLT_ROUNDS to -1 (indeterminate), because the
rounding mode on ARM is static, i.e. part of the FP instruction
format. Or at least that's my understanding.
- It was added to libc instead of libm. Hopefully no programs rely
on this mistake.
- It didn't work properly on large long doubles because its argument
was converted to type double, resulting in undefined behavior.
improved chance of working despite pressure from running programs.
Instead of trying to throw a bunch of pages out to swap and hope for
the best, only a range that can potentially fulfill contigmalloc(9)'s
request will have its contents paged out (potentially, not forcibly)
at a time.
The new contigmalloc operation still operates in three passes, but it
could potentially be tuned to more or less. The first pass only looks
at pages in the cache and free pages, so they would be thrown out
without having to block. If this is not enough, the subsequent passes
page out any unwired memory. To combat memory pressure refragmenting
the section of memory being laundered, each page is removed from the
systems' free memory queue once it has been freed so that blocking
later doesn't cause the memory laundered so far to get reallocated.
The page-out operations are now blocking, as it would make little sense
to try to push out a page, then get its status immediately afterward
to remove it from the available free pages queue, if it's unlikely to
have been freed. Another change is that if KVA allocation fails, the
allocated memory segment will be freed and not leaked.
There is a sysctl/tunable, defaulting to on, which causes the old
contigmalloc() algorithm to be used. Nonetheless, I have been using
vm.old_contigmalloc=0 for over a month. It is safe to switch at
run-time to see the difference it makes.
A new interface has been used which does not require mapping the
allocated pages into KVA: vm_page.h functions vm_page_alloc_contig()
and vm_page_release_contig(). These are what vm.old_contigmalloc=0
uses internally, so the sysctl/tunable does not affect their operation.
When using the contigmalloc(9) and contigfree(9) interfaces, memory
is now tracked with malloc(9) stats. Several functions have been
exported from kern_malloc.c to allow other subsystems to use these
statistics, as well. This invalidates the BUGS section of the
contigmalloc(9) manpage.
