CVS commit: [netbsd-9] src/sys/kern

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Fri Oct  8 14:58:08 UTC 2021

Modified Files:
        src/sys/kern [netbsd-9]: sys_pipe.c

Log Message:
Pull up following revision(s) (requested by hannken in ticket #1357):

        sys/kern/sys_pipe.c: revision 1.157

Fix a deadlock where one thread writes to a pipe, has more data
and no space in the pipe and waits on "pipe_wcv" while the reader
is closing the pipe and waits on "pipe_draincv".

Swap the test for "PIPE_EOF" and the "cv_wait_sig()" in "pipe_write()".

PR bin/56422 "zgrep -l sometimes hangs"


To generate a diff of this commit:
cvs rdiff -u -r1.148 -r1.148.2.1 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.