Implement pmap_growkernel() and pmap_extract_and_hold().
Remove the cache state logic : right now, it provides more problems than it
helps.
Add helper functions for mapping devices while bootstrapping.
Reorganize the code a bit, and remove dead code.
Add locking notes on the members of rusage. Note that these notes reflect
what is already present in the tree and apply to the rusage struct for
current process usage rather than child process usage.
Update locking notes on several fields to reflect locking already in the
tree:
- td_standin is (k + a) as it is only touched by either curthread or when
a thread is being created.
- td_upcall is (k + j)
- td_sticks is (k) rather than the earlier (j) note.
- td_uuticks and td_usticks are both (k).
- td_intrval is (j)
- Neither kg_nextupcall or kg_upquantum seem to be locked and that seems
to be on purpose, so mark those as (n).
- Assert sched_lock in upcall_remove() since it is needed there and all
callers already lock it there.
- Lock sched_lock slightly earlier in kse_create() so that it covers
kg_numupcalls.
- Don't try to unlock Giant if single threading fails since we don't have
it locked.
- Unlock Giant before calling exit1() since exit1() does not require Giant.
Introduce new /boot/loader.conf variable: root_mount_delay.
It can be used to delay mounting root partition to give a chance to GEOM
providers to show up.
Now, when there is no needed provider, vfs_rootmount() function will look
for it every second and if it can't be find in defined time, it'll ask
for root device name (before this change it was done immediately).
This will allow to boot from gmirror device in degraded mode.
Per recent HEADSUP: Disconnect (old)vinum from the kernel build.
Users should move to the new geom_vinum implementation instead.
The refcount logic which is being added to devices to enable safe module
unloading and the buf/vm work also in progress would require a major rework
of the (old)-vinum code to comply with the new semantics.
The actual source files will not be removed until I have coordinated with
the geomvinum people if they need any bits repo-copied etc.
Do not refcount the cdevsw, but rather maintain a cdev->si_threadcount
of the number of threads which are inside whatever is behind the
cdevsw for this particular cdev.
Make the device mutex visible through dev_lock() and dev_unlock().
We may want finer granularity later.
Replace spechash_mtx use with dev_lock()/dev_unlock().
Refrence bsdlabel.8 and bsdlabel.5 rather then the obsolete disklabel.8
and disklabel.5. Refrencing bsdlabel.5 is somewhat bogus as it is not
connected to the build and is mostly unwritten at this point.
Reported by: Matthias Andree <matthias.andree at web.de>
PR: docs/72020
For the atomic_{add|clear|set|subtract} family of inlines, return the
old or previous value instead of void. This is not as is documented
in atomic(9), but is API (and ABI) compatible and simply makes sense.
This feature will primarily be used for atomic PTE updates in PMAP/ng.
MFp4: various style fixes, including
o s/u_int/uint/g
o s/#define<sp>/#define<tab>/g
o indent macro definitions
o Improve vertical spacing
o Globally align line continuation character
The SUSv3 function say that the affected functions MAY FAIL, if the
specified mutex is invalid. In spec parlance 'MAY FAIL' means it's
up to the implementor. So, remove the check for NULL pointers for two
reasons:
1. A mutex may be invalid without necessarily being NULL.
2. If the pointer to the mutex is NULL core-dumping in the
vicinity of the problem is much much much better than failing
in some other part of the code (especially when the application
doesn't check the return value of the function that you oh so
helpfully set to EINVAL).
Add a couple of macros to extract the PCI slot (device) and function from
an ACPI _ADR value and use that rather than inlining the same shifts and
masks everywhere.
des [Wed, 22 Sep 2004 14:36:12 +0000 (14:36 +0000)]
Always link with -lpthread, not -lc_r, because platforms that don't have
full KSE support still have -lpthread as an alias for -lc_r. The only
thing that's different is the name of the knob that turns it off.
des [Wed, 22 Sep 2004 12:13:58 +0000 (12:13 +0000)]
Clean up and comment config.mk. Centralize more stuff. Bitch if
POSIX threads libraries are not available. Add crypto support if
the crypto libraries are available. Build dnssec-{keygen,signzone}
if crypto is available.
Fix a LOR where ifconf() used copyout while holding a mutex. This LOR
was seen when configuring addresses on interfaces using ifconfig. This
patch has been verified to work with over eight thousand addresses
assigned to an interface.
Add a temporary workaround to the panic on boot with hub attached and
panic on hub detach bugs that have been reported. This work around
detaches the device before deleting it. This changes the detach order
from in-order to pre-order. This avoids uhub's deleting the children
after its subdevs has been deleted.
This is only a workaround. This leads to a strange condition in the
device tree where attached devices are children of detached ones. I
really don't know what that's supposed to mean, but does violate my
sense of POLA. Fortunately, the violation is short lived, which is
why I'm going ahead and committing the work around.
# We really need to consider life w/o the multiple nested layers of
# compatibility macros. They make finding bugs like this *MUCH*
# harder.
Patch by: iadowse
MT5 before: next_release(5.3-BETA5) (unless someting better comes along)
Correct a long-standing error in _pmap_unwire_pte_hold() affecting
multiprocessors. Specifically, the error is conditioning the call to
pmap_invalidate_page() on whether the pmap is active on the current CPU.
This call must be unconditional. Regardless of whether the pmap is active
on the CPU performing _pmap_unwire_pte_hold(), it could be active on another
CPU. For example, a call to pmap_remove_all() by the page daemon could
result in a call to _pmap_unwire_pte_hold() with the pmap inactive on the
current CPU and active on another CPU. In such circumstances, failing to
call pmap_invalidate_page() results in a stale TLB entry on the other CPU
that still maps the now deallocated page table page. What happens next is
typically a mysterious panic in pmap_enter() by the other CPU, either
"pmap_enter: attempted pmap_enter on 4MB page" or "pmap_enter: pte vanished,
va: 0x%lx". Both occur because the former page table page has been recycled
and allocated to a new purpose. Consequently, it no longer contains zeroes.
See also Peter's i386/i386/pmap.c revision 1.448 and the related e-mail
thread last year.
Many thanks to the engineers at Sandvine for providing clear and concise
information until all of the pieces of the puzzle fell into place and
for testing an earlier patch.
Revert the last change..
Better to kill all other threads than to panic the system if 2 threads call
execve() at the same time. A better fix will be committed later.
Note that this only affects the case where the execve fails.
Hopefully fix alpha and sparc64 builds: on these architectures,
libpthread is provided by src/lib/libc_r.
Also, removed lib/bind from _generic_libs, "lib" will suffice.
Also, removed redundant lib/bind dependency on lib/libpthread
(as lib/bind is not in the _prebuild_libs, it's not needed).
Prodded by: trhodes@ reporting that des@ is on the flight
In a threaded process, don't kill off all the other threads until we have a
reasonable chance that the eceve() is going to succeeed. I.e.
wait until we've done the permission checks etc.
Improve netsend timing logic in various ways:
- Centralize time comparison.
- Check clock resolution to make sure it has enough granularity to
implement the desired wait interval.
- Keep track of how many times the timing loop has to spin waiting
for the next send time; report statistics.
- Add commented out warning about deadlines being missed when
spinning.
- Improve statistics reporting generally to provide a more useful
summary of sender condition after a run.
Initialize the flags value properly. We used to do this in acpi_tz_all_off()
but that function has been removed. This avoids a potential unnecessary
fan switch on boot. Also remove some commented out code.
Set default socket size for netreceive to 128k to reduce the chances
of the buffer overflowing before netreceive can be scheduled to read
the packets from the socket.
- Month and weekday names should begin with lowercase latter.
- First part of long month names should use genitive.
- Use more proper shortcuts, leaving the first 3 letters is not always
correct.
- Add support for "paging" in stack trace output. That is, when you do
a stack trace from ddb, the output will pause with a '--More--' prompt
every 18 lines. If you hit Enter, it will print another line and prompt
again. If you hit space it will output another page and then prompt.
If you hit 'q' or 'x' it will abort the rest of the stack trace.
- Fix the sparc64 userland stack trace to honor the total count of lines
to print. This is useful if your trace happens to walk back onto
0xdeadc0de and gets stuck in an endless loop.
MFC after: 1 month
Tested on: i386, alpha, sparc64
Force commit to provider more detailed info about this change.
There is no need to skip providers with 0 sectorsize in taste routine,
it is now forced by GEOM.
Actually, it can even cause some problems, because GEOM requires sectorsize
to be greater than 0 on first access, not on provider creation, so we can
skip valid providers by doing this check in taste method.
This is not needed anymore, it is forced in GEOM now.
Actually, it can even cause some problems, because GEOM requires sectorsize
to be more than 0 on first access, not on provider creation, so we can skip
valid providers by doing this check here.
Reported by: Divacky Roman <xdivac02@stud.fit.vutbr.cz>
Sven Willenberger <sven@dmv.com>
projects / FreeBSD / FreeBSD.git / log