freebsd-skq/sys/powerpc
Alan Cox 85f5b24573 In the common case, pmap_enter_quick() completes without sleeping.
In such cases, the busying of the page and the unlocking of the
containing object by vm_map_pmap_enter() and vm_fault_prefault() is
unnecessary overhead.  To eliminate this overhead, this change
modifies pmap_enter_quick() so that it expects the object to be locked
on entry and it assumes the responsibility for busying the page and
unlocking the object if it must sleep.  Note: alpha, amd64, i386 and
ia64 are the only implementations optimized by this change; arm,
powerpc, and sparc64 still conservatively busy the page and unlock the
object within every pmap_enter_quick() call.

Additionally, this change is the first case where we synchronize
access to the page's PG_BUSY flag and busy field using the containing
object's lock rather than the global page queues lock.  (Modifications
to the page's PG_BUSY flag and busy field have asserted both locks for
several weeks, enabling an incremental transition.)
2004-12-15 19:55:05 +00:00
..
aim In the common case, pmap_enter_quick() completes without sleeping. 2004-12-15 19:55:05 +00:00
compile
conf Reduce annoying SCSI probing delay from 15 to 5 seconds in all GENRIC kernels. 2004-11-02 20:57:20 +00:00
include Create a new definition, PSL_KERNSET, which is used for setting the 2004-11-30 09:04:41 +00:00
ofw Instead of "OpenFirmware", "openfirmware", etc. use the official spelling 2004-08-16 15:45:27 +00:00
powermac Stay up to date with the latest ATA developments, where 2004-11-02 09:29:31 +00:00
powerpc In the common case, pmap_enter_quick() completes without sleeping. 2004-12-15 19:55:05 +00:00
psim - Use the rman_get_* functions instead of reaching into struct resource. 2004-08-11 21:09:40 +00:00