CVS commit: syssrc

[Jason R Thorpe <thorpej%netbsd.org@localhost>]

Module Name:    syssrc
Committed By:   thorpej
Date:           Wed Jun  2 22:40:52 UTC 1999

Modified Files:
        syssrc/sys/uvm: uvm_map.c

Log Message:
Simplify the last even more; We downgraded to a shared (read) lock, so
setting recursive has no effect!  The kernel lock manager doesn't allow
an exclusive recursion into a shared lock.  This situation must simply
be avoided.  The only place where this might be a problem is the (ab)use
of uvm_map_pageable() in the Utah-derived pmaps for m68k (they should
either toss the iffy scheme they use completely, or use something like
uvm_fault_wire()).

In addition, once we have looped over uvm_fault_wire(), only upgrade to
an exclusive (write) lock if we need to modify the map again (i.e.
wiring a page failed).


To generate a diff of this commit:
cvs rdiff -r1.51 -r1.52 syssrc/sys/uvm/uvm_map.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.