Prevent buffer overflows when configuring boot selector.
Cycle through partitions when entering boot names.
Use '<UNUSED>' consistently.
Reviewed by: fvdl
we buzzloop calling gettimeofday() until we see a big jump.
old code would take the difference between the immediately previous return value.
Now, compute the difference based on the clock value as of right
after the previous big jump.
An alpha pc164 at 500MHz can do about 700 calls to gettimeofday() in
one clock tick, each of which increments tv_usec by 1 -- so the "big
jump" at the end is only ~270us rather than the real clock tick of
976us, which yields a precision value which is overoptimistic by a
factor of ~4. The corrected code now yields the exact tick value
(which is correct since NetBSD/alpha doesn't have a precise
microtime).
more than one per timer tick. this will hopefully cause faster
convergence since the responses are less likely to pile up on top of
each other. (they'll eventually get randomized out of synch with each
other, but there's no sense in starting them off synchronized).
approximation of reality if the MD code doesn't. This variable is the
equivalent of "tickfix" for the non-NTP path.
This allows an alpha kernel (where hz=1024) with "options NTP" to
synch up quite nicely (as opposed to having an frequency error of
~560ppm, which is outside the capture range of the PLL).
discuss what these should *really* look like, customize them tightly
for wscons, and then send them off to Eric Raymond for inclusion in
the master file.
If the entry is found in name cache, cache_lookup() does all the
necessary locking now, simplifying the interface and making the
code easier to follow and maintain.
The code now also removes the entry from cache when it's either invalid
(vget() fails) or the vnode has been recycled while waiting for the lock.
In that case, unlock/relock of the directory vnode has been eliminated too.
Both changes could lead to sligh performace improvement in same cases.
Furthermore, obscure bug has been found and eliminated for ISDOTDOT in the
lockparent && ISLASTCN case: if the vget() succeded and the re-lock
of the directory vnode not, we returned the error with the '..' vnode still
locked.
For simplicity, cache_lookup() now returns 0 if the positive entry was found
in cache, -1 if not found and ENOENT or error returned by the locking
functions in any other case.
Many thanks to Bill Studenmund and especially Charles Hannum
for invaluable advices and code to get this right.
Tested by: jdolecek
Rewieved by: wrstuden, mycroft
routines - avoids potential DoS attack and closes an easy way to force
the kernel to panic
* for read(), DTRT WRT offset bigger than file size
ntfs_strategy(): adapt to ntfs_readattr() change
ntfs_readdir(): use ntfs_u28() to translate the file name characters
to 8bit encoding, avoid excessive intendation, reformat the
debug messages slightly
christos