jhb [Sun, 7 Oct 2012 18:31:01 +0000 (18:31 +0000)]
MFC 226961,239951:
Add a -h flag similar to the -h flag for ln to force mv(1) to treat a
symbolic link to a directory for the target as a symbolic link instead of
a directory. This makes it possible to atomically update a symbolic
link using rename().
jhb [Sun, 7 Oct 2012 18:25:33 +0000 (18:25 +0000)]
MFC 239906:
Clarify that bus_dma does not stall future load requests once a load is
deferred. The caller is required to enforce that if that is desired.
jhb [Sun, 7 Oct 2012 18:18:59 +0000 (18:18 +0000)]
MFC 239913:
Attach interrupt handlers during attach instead of during the first time
the interface is brought up. Without this, the boot time interrupt
round-robin assignment does not think the allocated interrupt resources
are active and leaves them assigned to CPU 0.
While here, add descriptive tags to each interrupt handler when MSI-X
is used.
pfg [Sun, 7 Oct 2012 05:11:29 +0000 (05:11 +0000)]
MFC r241141, r241165, r241165, r241181;
rpc: convert all uid and gid variables to u_int.
Follow a similar change in Solaris and linux where the uid and
gid variables were made more similar to what the system expects.
In our case we use u_int which is what XDR can manage,
mav [Sat, 6 Oct 2012 13:01:08 +0000 (13:01 +0000)]
MFC r239194:
Allow idle threads to steal second threads from other cores on systems with
8 or more cores to improve utilization. None of my tests on 2xXeon (2x6x2)
system shown any slowdown from mentioned "excess thrashing". Same time in
pbzip2 test with number of threads more then number of CPUs I see up to 10%
speedup with SMT disabled and up 5% with SMT enabled. Thinking about
trashing I was trying to limit that stealing within same last level cache,
but got only worse results. Present code any way prefers to steal threads
from topologically closer cores.
mav [Sat, 6 Oct 2012 12:58:56 +0000 (12:58 +0000)]
MFC r239185, r239196:
Some minor tunings/cleanups inspired by bde@ after previous commits:
- remove extra dynamic variable initializations;
- restore (4BSD) and implement (ULE) hogticks variable setting;
- make sched_rr_interval() more tolerant to options;
- restore (4BSD) and implement (ULE) kern.sched.quantum sysctl, a more
user-friendly wrapper for sched_slice;
- tune some sysctl descriptions;
- make some style fixes.
mav [Sat, 6 Oct 2012 12:51:16 +0000 (12:51 +0000)]
MFC r239157:
Rework r220198 change (by fabient). I believe it solves the problem from
the wrong direction. Before it, if preemption and end of time slice happen
same time, thread was put to the head of the queue as for only preemption.
It could cause single thread to run for indefinitely long time. r220198
handles it by not clearing TDF_NEEDRESCHED in case of preemption. But that
causes delayed context switch every time preemption happens, even when not
needed.
Solve problem by introducing scheduler-specifoc thread flag TDF_SLICEEND,
set when thread's time slice is over and it should be put to the tail of
queue. Using SW_PREEMPT flag for that purpose as it was before just not
enough informative to work correctly.
On my tests this by 2-3 times reduces run time deviation (improves fairness)
in cases when several threads share one CPU.
mav [Sat, 6 Oct 2012 12:38:41 +0000 (12:38 +0000)]
MFC r239153:
SCHED_4BSD scheduling quantum mechanism appears to be broken for some time.
With switchticks variable being reset each time thread preempted (that is
done regularly by interrupt threads) scheduling quantum may never expire.
It was not noticed in time because several other factors still regularly
trigger context switches.
Handle the problem by replacing that mechanism with its equivalent from
SCHED_ULE called time slice. It is effectively the same, just measured in
context of stathz instead of hz. Some unification is probably not bad.
eadler [Fri, 5 Oct 2012 22:42:57 +0000 (22:42 +0000)]
MFC r241116:
Correct the tip about finding all the directories on the system
Add a tip about clearing the screen.
Make things more consistent by removing quotes around 'make search'
Passing an invalid pointer results in undefined behaviour.
The wrappers in libthr access some of the data pointed to by the arguments
in userland, so that an invalid pointer will cause a signal and not an
[EFAULT] error return.
Furthermore, if the [EFAULT] error occurs when the kernel is writing, it is
not a proper error in the sense that the call still commits (changing the
signal disposition or accepting the signal).
Reserve room for the terminating NUL when setting or getting kernel
environment variables. KENV_MNAMELEN and KENV_MVALLEN doesn't include
space for the terminating NUL.
rmacklem [Thu, 4 Oct 2012 12:43:45 +0000 (12:43 +0000)]
MFC: r240720
Modify the NFSv4 client so that it can handle owner
and owner_group strings that consist entirely of
digits, interpreting them as the uid/gid number.
This change was needed since new (>= 3.3) Linux
servers reply with these strings by default.
This change is mandated by the rfc3530bis draft.
Reported on freebsd-stable@ under the Subject
heading "Problem with Linux >= 3.3 as NFSv4 server"
by Norbert Aschendorff on Aug. 20, 2012.
trasz [Thu, 4 Oct 2012 08:43:49 +0000 (08:43 +0000)]
MFC r240085:
In getfacl(1) manual page, mention where to read about the ACL syntax.
PR submitter suggested adding it to acl(3) instead, but I don't think
pointing ordinary users at section 3 is a good idea.
MFC r240393:
- Fix detaching under some circumstances.
When truss is detaching from very active process it is possible to
hang on waitpid(2) in restore_proc() forever, because
ptrace(PT_SYSCALL) must be called before detaching, to allow the
debugging process to continue execution. Also when truss called with
'-c' argument, it does not print anything after detach, because it
immediately exits from restore_proc().
To fix these two problems make detaching deferred, but then it is
impossible to detach from a process which does not do any system call.
To fix this issue use sigaction(2) instead of signal(3) to disable
SA_RESTART flag for waitpid(2) that makes it non-restartable. Remove
global variable child_pid, because now detaching is handled in context
where child's pid is known.
bapt [Tue, 2 Oct 2012 17:04:53 +0000 (17:04 +0000)]
MFC r240682
if a file in plist starts with / then do not prefix it with "prefix" [1]
pkg info -g returns 1 if a file mismatch [2]
flush stdout in pkg info -g [3]
clean up quiet mode (-q | --quiet) output of pkg_version(1) [4]
fix missing error call in uname check added to pkg_version(1) [5]
fix pkg_add(1) fails to install with -C from bad path [6]
only resolve path from pkg_add(1) -p if the given prefix do not start with a '/' [7]
glebius [Tue, 2 Oct 2012 12:57:47 +0000 (12:57 +0000)]
Merge r240985 from head:
Fix bug in TCP_KEEPCNT setting, which slipped in in the last round
of reviewing of r231025.
Unlike other options from this family TCP_KEEPCNT doesn't specify
time interval, but a count, thus parameter supplied doesn't need
to be multiplied by hz.
jhb [Mon, 1 Oct 2012 19:09:25 +0000 (19:09 +0000)]
MFC 239008,239020:
Improve the handling of static DMA buffers that use non-default memory
attributes (currently just BUS_DMA_NOCACHE):
- Don't call pmap_change_attr() on the returned address, instead use
kmem_alloc_contig() to ask the VM system for memory with the requested
attribute.
- As a result, always use kmem_alloc_contig() for non-default memory
attributes, even for sub-page allocations. This requires adjusting
bus_dmamem_free()'s logic for determining which free routine to use.
- For x86, add a new dummy bus_dmamap that is used for static DMA
buffers allocated via kmem_alloc_contig(). bus_dmamem_free() can then
use the map pointer to determine which free routine to use.
- For powerpc, add a new flag to the allocated map (bus_dmamem_alloc()
always creates a real map on powerpc) to indicate which free routine
should be used.
Note that the BUS_DMA_NOCACHE handling in powerpc is currently #ifdef'd out.
I have left it disabled but updated it to match x86.
issyl0 [Mon, 1 Oct 2012 16:34:12 +0000 (16:34 +0000)]
MFC r241024 and r241026 from HEAD:
- Add a note to portsnap(8) about the behaviour of the example cron command.
- Change "only only" to "only" in portsnap(8).
trasz [Mon, 1 Oct 2012 11:16:22 +0000 (11:16 +0000)]
MFC r240575:
Remove references to userstat(1) and jailstat(1). Those tools were never
merged from the Perforce branch. They might be brought in when %CPU limits
go into the tree.
mav [Mon, 1 Oct 2012 08:33:39 +0000 (08:33 +0000)]
MFC r240917:
Reduce delays in several wait loops from 10ms to 10us, same is it is done
in Linux. This substantially increases graphics performance on Ivy Bridge.
MFC r240813:
Do not skip two elements of the tid_buffer when reusing the buffer
slot. This eventually results in exhaustion of the tid space, causing
new threads get tid -1 as identifier.
MFC r240951:
Make the updates of the tid ring buffer' head and tail pointers
explicit by moving them into separate statements from the buffer
element accesses.
Implement elfN(reloc) for powerpc. With this change the kernel is now able to
resolve dependencies of modules at boot time and load additional modules when
needed.
In snmp_hostres, device_map table is used for consistent device table
indexing. When a device has gone it is not removed from device_map
table but just its entry_p field is set to NULL.
So when traversing device_map in disk_OS_get_ATA_disks() and
disk_OS_get_MD_disks() check for entry_p being NULL, otherwise the
bsnmpd crash is possible when a removed map entry is dereferenced.
Before the fix, for disk_OS_get_ATA_disks() the crash could be easily
reproduced running:
atacontrol detach ata1
The crash was not observed in disk_OS_get_MD_disks() because currently
snmp_hostres does no see md(4) disks: to get the device list it uses
devinfo(3), which does not return md devices.
From r238812, move mtx_init of per-ring locks into NIOCREGIF ioctl handler.
(Otherwise they're overwritten with zeros in netmap_if_new.)
From r239149:
Improve lock and unlock symmetry
- Move destruction of per-ring locks to netmap_dtor_locked to mirror the
initialization that happens in NIOCREGIF. Otherwise unloading a netmap-
capable interface that was never put into netmap mode would try to
mtx_destroy an uninitialized mutex, and panic.
MFC r240741:
Plug the accounting leak for the wired pages when msync(MS_INVALIDATE)
is performed on the vnode mapping which is wired in other address space.
MFC: r240289
Add a simple printf() based debug facility to the new nfs client.
Use it for a printf() that can be harmlessly generated for mmap()'d
files. It will be used extensively for the NFSv4.1 client.
Debugging printf()s are enabled by setting vfs.nfs.debuglevel to
a non-zero value. The higher the value, the more debugging printf()s.
mm [Wed, 26 Sep 2012 12:36:09 +0000 (12:36 +0000)]
MFC r226940 (rmh):
Fix a few gratuitous library dependencies. Some of the ZFS utilities
are linked with libraries they don't use:
- zinject doesn't use libavl
- ztest doesn't use libz
- zdb uses neither libavl nor libz
- zfs uses neither libbsdxml nor libm, nor libsbuf
- zpool uses neither libbsdxml nor libm, nor libsbuf
In addition, libzfs needs libm because it uses pow(), however it isn't
linked with -lm. This went unnoticed because all its users had -lm before.
mm [Wed, 26 Sep 2012 10:58:15 +0000 (10:58 +0000)]
MFC r236248-r236250:
MFC r236248 (pjd):
Remove unused variable.
MFC r236249 (pjd):
Eliminate 'where' argument, we don't use it.
MFC r236250 (pjd):
Tighten up the assertion: because size can't be 0 and even if sm_space is equal
to sm_size, any 'sm_space - size' will be less than sm_size.
MFC r240862
Address a race condition that was introduced in r238212. Unless the page
queues lock is acquired before the page lock is released, there is no
guarantee that the page will still be in that same page queue when
vm_page_requeue() is called.
MFC r238371
When an MFI command fails, the driver needs to set bio->bio_resid so that
the upper levels notice. Otherwise we see commands silently failing leading
to data corruption. This mirrors dadone()
Submitted by: Andrew Boyer aboyer@averesystems.com
projects / FreeBSD / stable / 9.git / log