Module Name:	src
Committed By:	cl
Date:		Tue Sep 16 13:51:36 UTC 2003

Modified Files:
	src/include: sa.h
	src/lib/libc/sys: Makefile.inc
	src/lib/libpthread: pthread_run.c pthread_sa.c

Log Message:
fix SA/pthread pagefault failure:
- prevent BLOCKED upcalls on double page faults and during upcalls
- make libpthread handle blocked threads which hold locks
- prevent UNBLOCKED upcalls from overtaking their BLOCKED upcall
this adds a new syscall sa_unblockyield
see also http://mail-index.netbsd.org/tech-kern/2003/09/15/0020.html


To generate a diff of this commit:
cvs rdiff -r1.2 -r1.3 src/include/sa.h
cvs rdiff -r1.143 -r1.144 src/lib/libc/sys/Makefile.inc
cvs rdiff -r1.11 -r1.12 src/lib/libpthread/pthread_run.c
cvs rdiff -r1.15 -r1.16 src/lib/libpthread/pthread_sa.c

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