CVS commit: src/sys/arch/sparc64/sparc64

[matthew green <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Sun Mar 21 22:38:08 UTC 2010

Modified Files:
        src/sys/arch/sparc64/sparc64: pmap.c

Log Message:
since pmap_activate/pmap_deactivate need to not block, but the rest of
pmap is OK, add a new IPL_VM pmap_ctx_lock that is held while allocating
or freeing a context, and revert pmap_lock back to IPL_NONE.

i considered a per-cpu context lock, but that would require locking
each active CPUs lock in turn in pmap_remove_all() and pmap_destroy().

thanks to ad for explaining how these parts interact.


To generate a diff of this commit:
cvs rdiff -u -r1.260 -r1.261 src/sys/arch/sparc64/sparc64/pmap.c

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