CVS commit: src/sys/kern

[David Laight <dsl%netbsd.org@localhost>]

Module Name:    src
Committed By:   dsl
Date:           Sun Dec 13 20:02:23 UTC 2009

Modified Files:
        src/sys/kern: sys_pipe.c

Log Message:
Another, better, fix for PR/26567.
Only sleep once within each pipe_read/pipe_write call.
If there is no data/space available after we wakeup return ERESTART so
then the 'fd' number is validated again.
A simple broadcast of the cvs is then enough to evict the correct threads
when close() is called from an active thread.


To generate a diff of this commit:
cvs rdiff -u -r1.124 -r1.125 src/sys/kern/sys_pipe.c

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