re: kern/54033: Interrupted writes can cause pty to stall

[matthew green <mrg%eterna.com.au@localhost>]

The following reply was made to PR kern/54033; it has been noted by GNATS.

From: matthew green <mrg%eterna.com.au@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: re: kern/54033: Interrupted writes can cause pty to stall
Date: Sun, 03 Mar 2019 01:09:31 +1100

 this may or may not be related.
 
 some relatively small portion of the time when i run
 "cvs <something> | less" and the cvs has a lot of
 output (eg, annotate or log), and i do not let it
 complete running to completion and less having all the
 output buffered internally, by ^Z'ing back to the shell
 and doing other stuff.
 
 sometimes that ^Z hangs and i can't use that pty again
 until i kill -9 the pipe-writing process (eg, cvs log)
 at which point, i get my shell back and less is now
 suspended with some partial input.
 
 this was worse a few years ago and now happens only
 sometimes, vs often.  at the time, i thought the fix
 that christos had made solved my problem, but now i
 suspect it only makes it less likely to hit.
 
 
 .mrg.