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303975 |
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11-Aug-2016 |
gjb |
Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, and rename it to RC1.
Update __FreeBSD_version.
Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and the dvd1.iso packages population.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation |
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302408 |
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08-Jul-2016 |
gjb |
Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle. Prune svn:mergeinfo from the new branch, as nothing has been merged here.
Additional commits post-branch will follow.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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298819 |
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29-Apr-2016 |
pfg |
sys/kern: spelling fixes in comments.
No functional change.
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267992 |
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28-Jun-2014 |
hselasky |
Pull in r267961 and r267973 again. Fix for issues reported will follow.
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267985 |
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27-Jun-2014 |
gjb |
Revert r267961, r267973:
These changes prevent sysctl(8) from returning proper output, such as:
1) no output from sysctl(8) 2) erroneously returning ENOMEM with tools like truss(1) or uname(1) truss: can not get etype: Cannot allocate memory
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267961 |
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27-Jun-2014 |
hselasky |
Extend the meaning of the CTLFLAG_TUN flag to automatically check if there is an environment variable which shall initialize the SYSCTL during early boot. This works for all SYSCTL types both statically and dynamically created ones, except for the SYSCTL NODE type and SYSCTLs which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to be used in the case a tunable sysctl has a custom initialisation function allowing the sysctl to still be marked as a tunable. The kernel SYSCTL API is mostly the same, with a few exceptions for some special operations like iterating childrens of a static/extern SYSCTL node. This operation should probably be made into a factored out common macro, hence some device drivers use this. The reason for changing the SYSCTL API was the need for a SYSCTL parent OID pointer and not only the SYSCTL parent OID list pointer in order to quickly generate the sysctl path. The motivation behind this patch is to avoid parameter loading cludges inside the OFED driver subsystem. Instead of adding special code to the OFED driver subsystem to post-load tunables into dynamically created sysctls, we generalize this in the kernel.
Other changes: - Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask" to "hw.pcic.intr_mask". - Removed redundant TUNABLE statements throughout the kernel. - Some minor code rewrites in connection to removing not needed TUNABLE statements. - Added a missing SYSCTL_DECL(). - Wrapped two very long lines. - Avoid malloc()/free() inside sysctl string handling, in case it is called to initialize a sysctl from a tunable, hence malloc()/free() is not ready when sysctls from the sysctl dataset are registered. - Bumped FreeBSD version to indicate SYSCTL API change.
MFC after: 2 weeks Sponsored by: Mellanox Technologies
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233135 |
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19-Mar-2012 |
eadler |
- Clean up timestamps in msgbuf code. The timestamps should now be inserted after the priority token thus cleaning up the output. - Remove the needless double internal do_add_char function. - Resolve a possible deadlock if interrupts are disabled and getnanotime is called
Reviewed by: bde kmacy, avg, sbruno (various versions) Approved by: cperciva MFC after: 2 weeks
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231814 |
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16-Feb-2012 |
eadler |
Add a timestamp to the msgbuf output in order to determine when when messages were printed.
This can be enabled with the kern.msgbuf_show_timestamp sysctl
PR: kern/161553 Reviewed by: avg Submitted by: Arnaud Lacombe <lacombar@gmail.com> Approved by: cperciva MFC after: 1 month
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222550 |
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31-May-2011 |
ken |
Fix a bug introduced in revision 222537.
In msgbuf_reinit() and msgbuf_init(), we weren't initializing the mutex. Depending on the contents of memory, the LO_INITIALIZED flag might be set on the mutex (either due to a warm reboot, and the message buffer remaining in place, or due to garbage in memory) and in that case, with INVARIANTS turned on, we would trigger an assertion that the mutex had already been initialized.
Fix this by bzeroing the message buffer mutex for the _init() and _reinit() paths.
Reported by: mdf
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222537 |
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31-May-2011 |
ken |
Fix apparent garbage in the message buffer.
While we have had a fix in place (options PRINTF_BUFR_SIZE=128) to fix scrambled console output, the message buffer and syslog were still getting log messages one character at a time. While all of the characters still made it into the log (courtesy of atomic operations), they were often interleaved when there were multiple threads writing to the buffer at the same time.
This fixes message buffer accesses to use buffering logic as well, so that strings that are less than PRINTF_BUFR_SIZE will be put into the message buffer atomically. So now dmesg output should look the same as console output.
subr_msgbuf.c: Convert most message buffer calls to use a new spin lock instead of atomic variables in some places.
Add a new routine, msgbuf_addstr(), that adds a NUL-terminated string to a message buffer. This takes a priority argument, which allows us to eliminate some races (at least in the the string at a time case) that are present in the implementation of msglogchar(). (dangling and lastpri are static variables, and are subject to races when multiple callers are present.)
msgbuf_addstr() also allows the caller to request that carriage returns be stripped out of the string. This matches the behavior of msglogchar(), but in testing so far it doesn't appear that any newlines are being stripped out. So the carriage return removal functionality may be a candidate for removal later on if further analysis shows that it isn't necessary.
subr_prf.c: Add a new msglogstr() routine that calls msgbuf_logstr().
Rename putcons() to putbuf(). This now handles buffered output to the message log as well as the console. Also, remove the logic in putcons() (now putbuf()) that added a carriage return before a newline. The console path was the only path that needed it, and cnputc() (called by cnputs()) already adds a carriage return. So this duplication resulted in kernel-generated console output lines ending in '\r''\r''\n'.
Refactor putchar() to handle the new buffering scheme.
Add buffering to log().
Change log_console() to use msglogstr() instead of msglogchar(). Don't add extra newlines by default in log_console(). Hide that behavior behind a tunable/sysctl (kern.log_console_add_linefeed) for those who would like the old behavior. The old behavior led to the insertion of extra newlines for log output for programs that print out a string, and then a trailing newline on a separate write. (This is visible with dmesg -a.)
msgbuf.h: Add a prototype for msgbuf_addstr().
Add three new fields to struct msgbuf, msg_needsnl, msg_lastpri and msg_lock. The first two are needed for log message functionality previously handled by msglogchar(). (Which is still active if buffering isn't enabled.)
Include sys/lock.h and sys/mutex.h for the new mutex.
Reviewed by: gibbs
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139804 |
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06-Jan-2005 |
imp |
/* -> /*- for copyright notices, minor format tweaks as necessary
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119765 |
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05-Sep-2003 |
phk |
Put the message about msgbuf cksum mismatch under bootverbose and tell people what the consequence is.
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116660 |
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22-Jun-2003 |
iedowse |
Replace the code for reading and writing the kernel message buffer with a new implementation that has a mostly reentrant "addchar" routine, supports multiple message buffers in the kernel, and hides the implementation details from callers.
The new code uses a kind of sequence number to represend the current read and write positions in the buffer. This approach (suggested mainly by bde) permits the read and write pointers to be maintained separately, which reduces the number of atomic operations that are required. The "mostly reentrant" above refers to the way that while it is now always safe to have any number of concurrent writers, readers could see the message buffer after a writer has advanced the pointers but before it has witten the new character.
Discussed on: freebsd-arch
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