The stat() and open() calls have been changed to make use of this new functionality. Using shared locks in
these cases is sufficient and can significantly reduce their latency if IO is pending to these vnodes. Also,
this reduces the number of exclusive locks that are floating around in the system, which helps reduce the
number of deadlocks that occur.
A new kernel option "LOOKUP_SHARED" has been added. It defaults to off so this patch can be turned on for
testing, and should eventually go away once it is proven to be stable. I have personally been running this
patch for over a year now, so it is believed to be fully stable.
Reviewed by: jake, obrien
Approved by: jake
test and play with this.
This is not yet production quality and should be run only on dedicated
test boxes.
For people who want to develop transformations for GEOM there exist a
set of shims to run geom in userland (ask phk@freebsd.org).
Reports of all kinds to: phk@freebsd.org
Please include in report:
dmesg
sysctl debug.geomdot
sysctl debug.geomconf
Known significant limitations:
no kernel dump facility.
ioctls severely restricted.
Sponsored by: DARPA, NAI Labs
and teach it to look for more general classes of failures, including
SSH login failures. This is similar but not identical to a patch
submitted by aeonflux@synapse.subneural.net.
o Introduce /var/log/authentication.log, which will be the target for
auth.info and authpriv.info by default. Rotate on the same schedule
as most other logs. Create at installation.
o Remove logging of auth.info from /var/log/security.log, which will
return to being only for security feature subsystems (such as ipfw,
and so on).
This creates a special authentication log, which can now be searched
by scripts for authentication events.
update the free-space statistics in some cases. The problem affected
directory blocks when the free space dropped below the size of the
maximum allowed entry size. When this happened, the free-space
summary information could claim that there are no further blocks
that can fit a maximum-size entry, even if there are.
The effect of this bug is that the directory may be enlarged even
though there is space within the directory for the new entry. This
wastes disk space and has a negative impact on performance.
Fix it by correctly computing the dh_firstfree array index, adding
a helper macro for clarity. Put an extra sanity check into
ufsdirhash_checkblock() to detect the situation in future.
Found by: dwmalone
Reviewed by: dwmalone
MFC after: 1 week
read-only.
The trouble here is that we don't reopen the device in read/write mode
when we remount in read/write mode resulting in a filesystem sending
write requests to a device which was only opened read/only.
I'm not quite sure how such a reopen would best be done and defer
the problem to more agile hackers.
this in this file is the correct way round. (Maybe our definition of
__assert is wrong?)
Anyway, perhaps we should revisit this later. For the time being,
building lint libraries here does not blow up.
unit allocation with a bitmap in the generic layer. This
allows us to get rid of the duplicated rman code in every
clonable interface.
Reviewed by: brooks
Approved by: phk
argument. Don't fail silently, but let savecore(8) make noise. It
won't behave badly, it doesn't need protection.
At the same time, allow the administrator to have dumpdev enabled
while dumpdir (savecore(8)) is disabled and document how to do it.
PR: conf/35725
