| Commit message (Collapse) | Author | Age | Files | Lines |
|
|
|
|
|
|
| |
PR: docs/166497
Submitted by: Mike Kelly <pioto@pioto.org>
Approved by: cperciva
MFC after: 1 week
|
|
|
|
|
|
|
|
|
|
| |
outside the range of valid file descriptors
PR: kern/164970
Submitted by: Peter Jeremy <peterjeremy@acm.org>
Reviewed by: jilles
Approved by: cperciva
MFC after: 1 week
|
|
|
|
|
|
|
|
|
|
| |
usermode context switches (long jumps and ucontext operations). If these
are used across threads, multiple threads can end up with the same TLS base.
Madness will then result.
This makes behavior on PPC match that on x86 systems and on Linux.
MFC after: 10 days
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
compatibility, it broke programs using devstat, under 32-bit compatibility and
not.
It's very difficult to fix the identifiers used by devstat, so this change is
simply being backed out. Since changes to 3rd-party code seem likely, and may be
necessary to properly fix 32-bit binaries on 64-bit kernel, it would seem better
to make more invasive changes to fix GEOM's problems with 32-bit compatibility in
general.
The right thing to do is to replace all of the use of pointers as opaque
identifiers with a fixed-size (64-bit or even 32-bit should be enough for tracking
unique GEOM elments) field. That probably maintains source compatibility with
most GEOM consumers, and allows xml2tree to make better assumptions about how to
decode the identifiers.
Submitted by: Anton Yuzhaninov
|
|
|
|
|
|
|
|
|
| |
privilege attempts to toggle SF_SETTABLE flags.
- Use the '^' operator in the SF_SNAPSHOT anti-toggling check.
Flags are now stored to ip->i_flags in one place after all checks.
Submitted by: bde
|
|
|
|
|
|
|
|
|
|
|
|
| |
is already open in this process.
If the named semaphore is already open, sem_open() only increments a
reference count and did not take the flags into account (which otherwise
happens by passing them to open()). Add an extra check for O_CREAT|O_EXCL.
PR: kern/166706
Reviewed by: davidxu
MFC after: 10 days
|
|
|
|
|
|
|
| |
currently generated code clobbers r3. Fix this by loading ARM_TP_ADDRESS
using inline assembly.
Approved by: imp (mentor)
|
|
|
|
| |
on a platform.
|
|
|
|
| |
Sorry! :(
|
| |
|
|
|
|
|
|
|
| |
is a descriptor, not a code address), which prevents crashes when starting
a context. This fixes QEMU on powerpc64.
MFC after: 3 days
|
| |
|
|
|
|
|
|
|
| |
quotation. Also make sure we have the same amount of columns in each row as
the number of columns we specify in the head arguments.
Reviewed by: brueffer
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
correct sign when the remainder was 0.
Fix a separate bug in remquo alone, in which the remainder and
quotient were both off by a bit in certain cases involving subnormal
remainders.
The bugs affected all platforms except amd64 and i386, on which the
routines are implemented in assembly.
PR: 166463
Submitted by: Ilya Burylov
MFC after: 2 weeks
|
| |
|
| |
|
|
|
|
|
|
|
| |
application destroys semaphore after sem_wait returns. Just enter
kernel to wake up sleeping threads, only update _has_waiters if
it is safe. While here, check if the value exceed SEM_VALUE_MAX and
return EOVERFLOW if this is true.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
a mutex after a thread has unlocked it, it event writes data to the mutex
memory to clear contention bit, there is a race that other threads
can lock it and unlock it, then destroy it, so it should not write
data to the mutex memory if there isn't any waiter.
The new operation UMTX_OP_MUTEX_WAKE2 try to fix the problem. It
requires thread library to clear the lock word entirely, then
call the WAKE2 operation to check if there is any waiter in kernel,
and try to wake up a thread, if necessary, the contention bit is set again
by the operation. This also mitgates the chance that other threads find
the contention bit and try to enter kernel to compete with each other
to wake up sleeping thread, this is unnecessary. With this change, the
mutex owner is no longer holding the mutex until it reaches a point
where kernel umtx queue is locked, it releases the mutex as soon as
possible.
Performance is improved when the mutex is contensted heavily. On Intel
i3-2310M, the runtime of a benchmark program is reduced from 26.87 seconds
to 2.39 seconds, it even is better than UMTX_OP_MUTEX_WAKE which is
deprecated now. http://people.freebsd.org/~davidxu/bench/mutex_perf.c
|
|
|
|
|
|
|
|
| |
by the current code, and the results would get overwritten anyway
by subsequent memset().
Reviewed by: ume
MFC after: 1 month
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
via procstat(1) and fstat(1):
- Change shm file descriptors to track the pathname they are associated
with and add a shm_path() method to copy the path out to a caller-supplied
buffer.
- Use the fo_stat() method of shared memory objects and shm_path() to
export the path, mode, and size of a shared memory object via
struct kinfo_file.
- Add a struct shmstat to the libprocstat(3) interface along with a
procstat_get_shm_info() to export the mode and size of a shared memory
object.
- Change procstat to always print out the path for a given object if it
is valid.
- Teach fstat about shared memory objects and to display their path,
mode, and size.
MFC after: 2 weeks
|
| |
|
|
|
|
| |
Reviewed by: brueffer
|
| |
|
| |
|
|
|
|
|
| |
this syntax violation and while I'm here also convert <TAB> to Ta and adjust
quotation marks in order to prevent this problem in the future.
|
| |
|
|
|
|
|
|
|
| |
Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Kernel pointer values are used as opaque unique identifiers, which are then
used to reconstruct references between various providers, classes, etc., inside
libgeom from the source XML. Unfortunately, they're converted to pointer-width
integers (in the form of pointers) to do this, and 32-bit userland pointers
cannot hold sensible representations (however opaque) of 64-bit kernel pointers
on all systems.
In the case where the leading bits are zero and 32 distinct bits of pointer can
be identified, this will happen to work. On systems where the upper 32-bits of
kernel pointers are non-zero and the same for all kernel pointers, this will
result in double frees and all kinds of bizarre crashes and linkage between
objects inside libgeom.
To mitigate this problem, treat the opaque identifiers in the XML as C strings
instead, and internalize them to give unique and consistent per-object pointer
values in userland for each identifier in the XML. This allows us to keep the
libgeom logic the same with only minor changes to initial setup and parsing.
It might be more sensible for speed reasons to treat the identifiers as numbers
of a large size (uintmax_t, say) rather than strings, but strings seem fine for
now.
(As an added side-effect, this makes it slightly easier to identify unresolved
references, but nothing has been added to inform the user of those.)
|
|
|
|
|
| |
Reviewed by: gjb
Approved by: sbruno
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
New kernel events can be added at various location for sampling or counting.
This will for example allow easy system profiling whatever the processor is
with known tools like pmcstat(8).
Simultaneous usage of software PMC and hardware PMC is possible, for example
looking at the lock acquire failure, page fault while sampling on
instructions.
Sponsored by: NETASQ
MFC after: 1 month
|
|
|
|
| |
Reviewed by: gabor
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
|
|
| |
Reviewed by: brueffer
|
| |
|
|
|
|
|
|
|
| |
use it by its new name (SIGLIBRT) rather than internal definition
in librt (SIGSERVICE).
Approved by: davidxu, arch
|
| |
|
|
|
|
|
|
|
|
| |
_SIG_MAXSIG works a bit unexpectedly: signals 1 till _SIG_MAXSIG are valid,
both bounds inclusive.
Reviewed by: davidxu
MFC after: 1 week
|
| |
|
|
|
|
| |
Noticed by: brueffer
|
|
|
|
| |
Reviewed by: brueffer
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
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
|
| |
|
| |
|
| |
|
|
|
|
|
|
|
|
| |
- 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.
|