breakage for old mount(2) syscall, since most struct <filesystem>_args
embed export_args. The mount(2) is supposed to provide ABI
compatibility for pre-nmount mount(8) binaries, so restore ABI to
pre-r184588.
Requested and reviewed by: bde
MFC after: 2 weeks
This is to prevent caching of its value in a register when it is checked
and modified by multiple CPUs in parallel.
Also, move the variable into the scope of the only function that uses it.
Reviewed by: jhb
Hint from: mdf
MFC after: 1 week
When set, it forces all timestamps and owners to zero and
modes to 0644. Useful for producing libraries that are
bitwise identical across multiple build runs.
Submitted by: Erik Cederstrand
Reviewed by: Kai Wang
rwlock to protect the table. In old code, thread lookup is done with
process lock held, to find a thread, kernel has to iterate through
process and thread list, this is quite inefficient.
With this change, test shows in extreme case performance is
dramatically improved.
Earlier patch was reviewed by: jhb, julian
error messages, so when we clean up after child process, we have to check if
the event socketpair is still there.
Submitted by: Mikolaj Golub <to.my.trociny@gmail.com>
MFC after: 3 days
to the expected type so they work like the corresponding __bswapN_var()
functions and the compiler doesn't complain when arguments of different
width are passed.
opposition to the change, since really we need to implement missing
functionality in drivers or the 802.3 layer.
For now, restore a reminder message for a missing rum_update_mcast, but
print it only once.
controller, but make it optional.
After a problem report from Andrew Boyer, it looks like the LSI
chip may have issues (the watchdog timer fired) if too many aborts
are sent down to the chip at the same time. We know that task
management commands are serialized, and although the manual doesn't
say it, it may be a good idea to just send one at a time.
But, since I'm not certain that this is necessary, add a tunable
and sysctl variable (hw.mps.%d.allow_multiple_tm_cmds) to control
the driver's behavior.
mps.c: Add support for the sysctl and tunable, and add a
comment about the possible return values to
mps_map_command().
mps_sas.c: Run all task management commands through two new
routines, mpssas_issue_tm_request() and
mpssas_complete_tm_request().
This allows us to optionally serialize task
management commands. Also, change things so that
the response to a task management command always
comes back through the callback. (Before it could
come via the callback or the return value.)
mpsvar.h: Add softc variables for the list of active task
management commands, the number of active commands,
and whether we should allow multiple active task
management commands. Add an active command flag.
mps.4: Describe the new sysctl/loader tunable variable.
Sponsored by: Spectra Logic Corporation
I'm unable to reproduce the race described in comment anymore and also the
comment is incorrect - localfd represents local component from configuration
file, eg. /dev/da0 and not HAST provider.
Reported by: Mikolaj Golub <to.my.trociny@gmail.com>
MFC after: 1 week
physical memory
This is needed to correctly autotune ZFS ARC size when vm_kmem_size is
set to value larger than available physical memory.
MFC after: 2 weeks
