NetBSD Problem Report #55945

From gson@gson.org  Fri Jan 22 14:49:11 2021
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Message-Id: <20210122144853.1EBC3253EDE@guava.gson.org>
Date: Fri, 22 Jan 2021 16:48:53 +0200 (EET)
From: gson@gson.org (Andreas Gustafsson)
Reply-To: gson@gson.org (Andreas Gustafsson)
To: gnats-bugs@NetBSD.org
Subject: rump/rumpkern/t_vm:busypage fails since early December
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>Number:         55945
>Category:       kern
>Synopsis:       rump/rumpkern/t_vm:busypage fails since early December
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 22 14:50:00 +0000 2021
>Last-Modified:  Sat Jan 23 10:05:01 +0000 2021
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current
>Organization:
>Environment:
System: NetBSD
Architecture: i386
Machine: i386
>Description:

On December 8, 2020, the TNF testbed sent the following report to
current-users.  The failure is still happening as of source date
2021.01.21.21.45.42.

  This is an automatically generated notice of a new failure of the
  NetBSD test suite.

  The newly failing test case is:

      rump/rumpkern/t_vm:busypage

  The above test failed in each of the last 4 test runs, and passed in
  at least 26 consecutive runs before that.

  Between the last successful test and the failed test, a total of 434
  revisions were committed, by the following developers:

      christos
      chs
      dholland
      jdc
      jmcneill
      mrg
      nia
      rillig
      rin
      sjg
      skrll
      thorpej
      tsutsui

  The first of these commits was made on CVS date 2020.12.05.18.17.01,
  and the last on 2020.12.07.10.02.51.

  Logs can be found at:

      http://releng.NetBSD.org/b5reports/i386/commits-2020.12.html#2020.12.07.10.02.51

>How-To-Repeat:

>Fix:

>Audit-Trail:
From: "Chuck Silvers" <chs@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/55945 CVS commit: src/tests/rump/rumpkern
Date: Fri, 22 Jan 2021 22:03:01 +0000

 Module Name:	src
 Committed By:	chs
 Date:		Fri Jan 22 22:03:01 UTC 2021

 Modified Files:
 	src/tests/rump/rumpkern: t_vm.c

 Log Message:
 for the busypage test, replace atf_tc_expect_fail() with atf_tc_skip()
 because atf apparently has no way to expect a test program to crash.
 fixes PR 55945.


 To generate a diff of this commit:
 cvs rdiff -u -r1.5 -r1.6 src/tests/rump/rumpkern/t_vm.c

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

From: Andreas Gustafsson <gson@gson.org>
To: "Chuck Silvers" <chs@netbsd.org>
Cc: gnats-bugs@netbsd.org
Subject: Re: PR/55945 CVS commit: src/tests/rump/rumpkern
Date: Sat, 23 Jan 2021 12:04:04 +0200

 Chuck Silvers wrote:
 >  Module Name:	src
 >  Committed By:	chs
 >  Date:		Fri Jan 22 22:03:01 UTC 2021
 >  
 >  Modified Files:
 >  	src/tests/rump/rumpkern: t_vm.c
 >  
 >  Log Message:
 >  for the busypage test, replace atf_tc_expect_fail() with atf_tc_skip()
 >  because atf apparently has no way to expect a test program to crash.
 >  fixes PR 55945.
 >
 >  To generate a diff of this commit:
 >  cvs rdiff -u -r1.5 -r1.6 src/tests/rump/rumpkern/t_vm.c

 For context, the previous commit (predating the PR) was:

   Revision 1.5
   date: 2020-12-08 19:52:11 +0200;  author: chs;  state: Exp;  lines: +2 -1;  commitid: OWDf2vgr44wLVXyC;
   the busypage test is buggy, expect it to fail.

 If you think a test is buggy and you can't fix it, you should file a PR
 about it and include a reference to that PR in the atf_tc_expect_fail()
 or atf_tc_skip() message.

 I don't think this PR should be considered "fixed" until either the
 buggy test has been fixed, or the atf_tc_skip() message contains a
 reference to a PR.
 -- 
 Andreas Gustafsson, gson@gson.org

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