| Commit message (Collapse) | Author | Age | Files | Lines |
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than as one-off hacks in various other parts of the kernel:
- Add a function maybe_preempt() that is called from sched_add() to
determine if a thread about to be added to a run queue should be
preempted to directly. If it is not safe to preempt or if the new
thread does not have a high enough priority, then the function returns
false and sched_add() adds the thread to the run queue. If the thread
should be preempted to but the current thread is in a nested critical
section, then the flag TDF_OWEPREEMPT is set and the thread is added
to the run queue. Otherwise, mi_switch() is called immediately and the
thread is never added to the run queue since it is switch to directly.
When exiting an outermost critical section, if TDF_OWEPREEMPT is set,
then clear it and call mi_switch() to perform the deferred preemption.
- Remove explicit preemption from ithread_schedule() as calling
setrunqueue() now does all the correct work. This also removes the
do_switch argument from ithread_schedule().
- Do not use the manual preemption code in mtx_unlock if the architecture
supports native preemption.
- Don't call mi_switch() in a loop during shutdown to give ithreads a
chance to run if the architecture supports native preemption since
the ithreads will just preempt DELAY().
- Don't call mi_switch() from the page zeroing idle thread for
architectures that support native preemption as it is unnecessary.
- Native preemption is enabled on the same archs that supported ithread
preemption, namely alpha, i386, and amd64.
This change should largely be a NOP for the default case as committed
except that we will do fewer context switches in a few cases and will
avoid the run queues completely when preempting.
Approved by: scottl (with his re@ hat)
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not of any interest. This primairly happens when vlan(4) interfaces are
created.
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This class is used for detecting volume labels on file systems:
UFS, MSDOSFS (FAT12, FAT16, FAT32) and ISO9660.
It also provide native labelization (there is no need for file system).
g_label_ufs.c is based on geom_vol_ffs from Gordon Tetlow.
g_label_msdos.c and g_label_iso9660.c are probably hacks, I just found
where volume labels are stored and I use those offsets here,
but with this class it should be easy to do it as it should be done by
someone who know how.
Implementing volume labels detection for other file systems also should
be trivial.
New providers are created in those directories:
/dev/ufs/ (UFS1, UFS2)
/dev/msdosfs/ (FAT12, FAT16, FAT32)
/dev/iso9660/ (ISO9660)
/dev/label/ (native labels, configured with glabel(8))
Manual page cleanups and some comments inside were submitted by
Simon L. Nielsen, who was, as always, very helpful. Thanks!
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header pointer and then casting it to the ecdt pointer. This fixes the
-O2 build. I'm unsure what changed recently to reveal this error since
this code has been unchanged for months.
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switch to. If a non-NULL thread pointer is passed in, then the CPU will
switch to that thread directly rather than calling choosethread() to pick
a thread to choose to.
- Make sched_switch() aware of idle threads and know to do
TD_SET_CAN_RUN() instead of sticking them on the run queue rather than
requiring all callers of mi_switch() to know to do this if they can be
called from an idlethread.
- Move constants for arguments to mi_switch() and thread_single() out of
the middle of the function prototypes and up above into their own
section.
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use full duplex mode.
Approved by: matk
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following drivers: bfe(4), em(4), fxp(4), lnc(4), tun(4), de(4) rl(4),
sis(4) and xl(4)
More patches are pending on: http://peoples.freebsd.org/~mlaier/ Please take
a look and tell me if "your" driver is missing, so I can fix this.
Tested-by: many
No-objection: -current, -net
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Reviewed by: marcel
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size rounded up to a multiple of the access byte width. This overcomes
"off-by-one" programming errors in the AML often found in Toshiba
laptops.
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which included commits to RCS files with non-trunk default branches.
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not holding the filelist_lock. This means the filelist can change
size while allocating. Detect this race and retry the allocation.
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lock and sched_lock so they can be read with either lock held. Document
the locking as well. The one remaining bogosity is that pr_addr and
pr_ticks should be per-thread but profiling of multithreaded apps is
currently undefined.
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stats structure and a vmspace as this should always be true rather
than checking the always true condition in an if statement.
- Remove never-false check: if ((ru = &pstats->p_ru) != NULL)
- Remove pstats variable that is only used once and inline its one use
instead.
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Just use p2->p_uarea directly instead.
- Remove an old and mostly bogus assertion regarding p2->p_sigacts.
- Use RANGEOF macro ala fork1() to clean up bzero/bcopy of p_stats.
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the VIA v3 register offsets.
PR: 68545
Submitted by: Ariff Abdullah <skywizard@mybsd.org.my>
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pointer to the corresponding struct thread to the thread ID (lwpid_t)
assigned to that thread. The primary reason for this change is that
libthr now internally uses the same ID as the debugger and the kernel
when referencing to a kernel thread. This allows us to implement the
support for debugging without additional translations and/or mappings.
To preserve the ABI, the 1:1 threading syscalls, including the umtx
locking API have not been changed to work on a lwpid_t. Instead the
1:1 threading syscalls operate on long and the umtx locking API has
not been changed except for the contested bit. Previously this was
the least significant bit. Now it's the most significant bit. Since
the contested bit should not be tested by userland, this change is
not expected to be visible. Just to be sure, UMTX_CONTESTED has been
removed from <sys/umtx.h>.
Reviewed by: mtm@
ABI preservation tested on: i386, ia64
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faster and iterate to over its work list a few times in an attempt
to empty the work list before the syncer terminates. This leaves
fewer dirty blocks to be written at the "syncing disks" stage and
keeps the the "giving up on N buffers" problem from being triggered
by the presence of a large soft updates work list at system shutdown
time. The downside is that the syncer takes noticeably longer to
terminate.
Tested by: "Arjan van Leeuwen" <avleeuwen AT piwebs DOT com>
Approved by: mckusick
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entered correctly.
Fix this problem by separating out the SACK and the newreno cases. Also, check
if we are in FASTRECOVERY for the sack case and if so, turn off dupacks.
Fix an issue where the congestion window was not being incremented by ssthresh.
Thanks to Mohan Srinivasan for finding this problem.
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Changed if_ipending to if_flags
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rev 1.66, author: mycroft
Fix an endianness problem (EHCI_NULL was being double-swapped).
Obtained from: NetBSD
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rev. 1.68, author: mycroft
Ignore a port error that happens to come in at the same time as a
connect status change. Some root hubs seem to report both.
Obtained from: NetBSD
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Fixed markup.
Fixed examples to match the new API.
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the struct resource for a malloc, it no longer needs it for the r_
elements of struct resource with this commit.
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necessary for this file. It just needed the size and guts of struct
rman.
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bus interfaces. These interfaces use the FTDI chipset with different
Vendor and Product IDs.
Add two additional baud rate enumerations. The vehicle bus interfaces
use a baud rate of 2000000. Also add 3000000 as it is the other FTDI
baud divisor special case.
I've commited a slightly different patch from that provided in the PR as
I changed the matching code a bit yesterday.
Submitted by: Mike Durian <durian at shadetreesoftware.com>
PR: kern/67357
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resource_head types. Also add a way to set start and end so fewer
things need to reach into struct resource.
Pointy hat to: imp for breaking the build on so many platforms.
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for an OpenFirmware implementation to have a single memory region
(hello PearPC).
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to clients now that it's protected with __RMAN_RESOURCE_VISIBLE
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