The locking here needs to be revisited, but this ought to get rid of the
LOR messages that people are complaining about for now. I imagine either
I or someone else interested with smp will eventually clear this up.
unconditionally. kldloading a cardbus driver was shooting down other
attached devices because most drivers assume that one cannot
power-cycle cards w/o the driver knowning about it.
Submitted by: simokawa-san
- Use the ratio of kg_runtime / kg_slptime to determine our dynamic priority.
- Scale kg_runtime and kg_slptime back when the sum of the two exceeds
SCHED_SLP_RUN_MAX. This allows us to slowly forget old behavior.
- Scale back the runtime and slptime in fork so that the new process has the
same ratio but much less accumulated time. This causes new behavior to be
noticed more quickly.
blocks now, which should eliminate problems with the driver failing to
attach due to insufficient contiguous RAM. Allow the FIB pool to grow
from the default of 128 to the max of 512 as demand grows. Also pad the
adapter init struct to work around the 2120/2200 DMA bug now that there
is no longer a FIB slab.
idle time.
Statistics now default to "on" and can be turned off with
sysctl kern.geom.collectstats=0
Performance impact of statistics collection is on the order of
800 nsec per consumer/provider set on a 700MHz Athlon.
that is protected by the vnode lock.
- Move B_SCANNED into b_vflags and call it BV_SCANNED.
- Create a vop_stdfsync() modeled after spec's sync.
- Replace spec_fsync, msdos_fsync, and hpfs_fsync with the stdfsync and some
fs specific processing. This gives all of these filesystems proper
behavior wrt MNT_WAIT/NOWAIT and the use of the B_SCANNED flag.
- Annotate the locking in buf.h
buf lists, synchronization variables, and atomic ops for the counters.
This change does not remove giant from any code although some pushdown
may be possible.
- In vfs_bio_awrite() don't access buf fields without the buf lock.
