Suggested by uwe@, in reaction to the previous commit, which preferred
octal in the examples. Hexadecimal escapes are more familiar to most
programmers, and the chance of mistaking \x14 for decimal 14 is less
than the chance of mistaking octal \014 for decimal 14.
If we have missed hardclock ticks, schedule up to one tick interval
in the future anyway; don't try to play hardclock catchup by
scheduling for when the next hardclock tick _should_ have been, in
the past, leading to ticking as fast as possible until we've caught
up. as fast as possible until we've caught up.
Playing hardclock catchup triggers heartbeat panics when continuing
from ddb, if you've been in ddb for >15sec. Other hardclock drivers
like x86 lapic don't play hardclock catchup either.
PR kern/57920
a /var/run/named file (which in general would be wrong, as most sites run
named in a chroot these days) the file is obsolete, and should not, and
does not, get generated by the build, nor should it be included in any
sets.
Ideally we'd have an "optional" flag for the sets files, to allow them
to mention files that might exist, and don't matter (and are not included
in the sets), but that's a bigger change than is needed just to fix the
builds.
The goal is to give a better understanding which hardware they represent
and how to build them. Also not to lose this information over the years.
Loosely based on a README.evbarm, however has additional notes on building
targets. The file is not final, some discussion came up about the need of
*32 kernel configs. simon is planning to review.
Using hexadecimal character escapes requires separate string literals if
the description starts with one of the letters A-F; octal character
escapes have at most 3 digits, reducing ambiguity.
XXXX's to be at the end of the name (like mk*temp(3)) so however well
it will work with mktemp implementations which allow the X's to be
anywhere in the final component of the name, it will work just as
well on them with the X's at the end.
But we don't normally need all of that mess - knowing which temp
file is which is useful only when debugging the script, and that's
(mostly) long done. So, in normal uses now just use $(mktemp) and
allow mktemp to pick its own name - we don't need to know what it is.
Every mktemp(1) supports that mode of operation.
Bug when debugging the script (which for current purposes will be
taken to be when the -x flag is passed to the shell running it, to
trace what it does) then we will make the temp files have names we
can recognise (and in that case, also don't delete them when done).
While here, check for mktemp(1) failing, and abort if that
happens (we assume that if it fails it will write an error
message to stderr, so the script does not need to.)
As for the purpose of the script ... of course the header file
generated (or an equivalent elsewhere) could be generated and
maintained by hand, but why would anyone want to do all that
work when software can do it for us, and do it correctly without
human thought?
This also allows the options in the master list (option.list) to be
arranged in a way that is meaningful for them, unrelated to the order
the shell needs to have them in (or rearrange them to be at run time)
and have that order shuffled however is convenient. Currently all
the posix standard options are first, then the "hybrid" options, and
finally the local ones for this shell. Currently "pipefail" is in the
final set, but once the next posix version is published, that will
become a standard option, and get moved in the list - the shell won't
even notice as this script puts the options into shell desired order.
Use `printf` instead of `echo` for precise output
`man` pages generated under NetBSD and Linux differ as the escape codes
may or may not be interpreted when going through those two chained `echo`es.
Instead just use `printf`, which produces the desired output, always.
Fix a redirection and prepare a stable sort for upper-/lowercase
option letters
This script is a mess, I strongly believe that it should be rewritten.
However, I'm not 100% sure why it was invented in the first place
(come on, the generated header file isn't _that_ complicated that
it couldn't be sanely managed by hand!), but let's fix the sorting
order by using LC_ALL=C.
Also add a few 'X' to the `mktemp` template to make non-BSD
implementations happy. As a bonus, actually *use* the initial `sed`
output instead of throwing it away by piping it into `sort` with
also connecting `sort`'s stdin with the original input file...
Add an assert to usbd_xfer_schedule_timeout to enforce this.
Since access to ux_status is serialized by the bus lock, and nothing
releases the bus lock in the interim, this doesn't make a functional
change. But it does reduce confusion by readers, who no longer have
to worry if some callers got the order wrong. It could also now
potentially be factored out in a subsequent commit.
PR kern/58111 .
It would be extremely unlikely to trip this bug on NetBSD, as we don't
expose SEEK_DATA and SEEK_HOLE and you need to call ioctl(2) with
FIOSEEKDATA and FIOSEEKHOLE directly which no currently known code does,
and even then be unlucky enough to trip a race condition.
With a reproducer based on that in https://www.illumos.org/issues/16087,
I saw 11 groups of failures over 8 hours. With this patch, no
failures in 10 hours. The repro for NetBSD will be attached to
https://gnats.netbsd.org/58111 .
Original FreeBSD commit message:
--------------------------------
dnode_is_dirty: check dnode and its data for dirtiness
Over its history this the dirty dnode test has been changed between
checking for a dnodes being on `os_dirty_dnodes` (`dn_dirty_link`) and
`dn_dirty_record`.
It turns out both are actually required.
In the case of appending data to a newly created file, the dnode proper
is dirtied (at least to change the blocksize) and dirty records are
added. Thus, a single logical operation is represented by separate
dirty indicators, and must not be separated.
The incorrect dirty check becomes a problem when the first block of a
file is being appended to while another process is calling lseek to skip
holes. There is a small window where the dnode part is undirtied while
there are still dirty records. In this case, `lseek(fd, 0, SEEK_DATA)`
would not know that the file is dirty, and would go to
`dnode_next_offset()`. Since the object has no data blocks yet, it
returns `ESRCH`, indicating no data found, which results in `ENXIO`
being returned to `lseek()`'s caller.
This change simply updates the dirty check to check both types of dirty.
If there's anything dirty at all, we immediately go to the "wait for
sync" stage, It doesn't really matter after that; both changes are on
disk, so the dirty fields should be correct.
Sponsored by: Klara, Inc.
Sponsored by: Wasabi Technology, Inc.
Make sure to build external/mit before external/mpl (as bind in mpl
needs libuv from mit) and in mit/libuv make sure to build the
static library with the new MAKESTATICLIB mechanism, as that is
what bind needs.
rillig