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Re: kern/56414: cmake hang on kqueue (condvar waiter list issue) ?
The following reply was made to PR kern/56414; it has been noted by GNATS.
From: Joerg Sonnenberger <joerg%bec.de@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
netbsd-bugs%netbsd.org@localhost, Manuel.Bouyer%lip6.fr@localhost
Subject: Re: kern/56414: cmake hang on kqueue (condvar waiter list issue) ?
Date: Wed, 22 Sep 2021 15:45:45 +0200
On Wed, Sep 22, 2021 at 04:35:02AM +0000, Manuel Bouyer wrote:
> The following reply was made to PR kern/56414; it has been noted by GNATS.
>
> From: Manuel Bouyer <manuel.bouyer%lip6.fr@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/56414: cmake hang on kqueue (condvar waiter list issue) ?
> Date: Wed, 22 Sep 2021 06:33:09 +0200
>
> On Tue, Sep 21, 2021 at 11:40:01PM +0000, Joerg Sonnenberger wrote:
> > On Tue, Sep 21, 2021 at 03:00:00PM +0000, Manuel.Bouyer%lip6.fr@localhost wrote:
> > > >Number: 56414
> > > >Category: kern
> > > >Synopsis: cmake hang on kqueue
> > > >Confidential: no
> > > >Severity: serious
> > > >Priority: high
> > > >Responsible: kern-bug-people
> > > >State: open
> > > >Class: sw-bug
> > > >Submitter-Id: net
> > > >Arrival-Date: Tue Sep 21 15:00:00 +0000 2021
> > > >Originator: Manuel Bouyer
> > > >Release: NetBSD 9.99.77
> > > >Organization:
> > > >Environment:
> > > System: NetBSD amd64-nb9.netbsd.org 9.99.77 NetBSD 9.99.77 (amd64-nb9-PVH) #3: Sun Jan 10 08:56:13 UTC 2021 spz%franklin.NetBSD.org@localhost:/home/netbsd/current/amd64/obj/sys/arch/amd64/compile/amd64-nb9-PVH amd64
> > > Architecture: x86_64
> > > Machine: amd64
> > > >Description:
> > > In a full pbulk build, I see cmake process hanging on kqueue,
> > > stalling the build. usually, a kill -STOP/kill -CONT on the
> > > cmake process wakes it up, and the package build completes without
> > > issue. This will occur several times in a pbulk run.
> > > This has been discussed several times on NetBSD's lists,
> > > as in
> > > http://mail-index.netbsd.org/tech-kern/2021/01/12/msg027056.html
> > > https://mail-index.netbsd.org/current-users/2021/04/06/msg040695.html
> >
> > This is not a kernel issue, but a corruption of the wait list in
> > userland.
>
> Ha, interesting. The userland is 9.0_STABLE/amd64 from
> Jun 11 22:49:34 UTC 2020. Any idea if a fix is available in netbsd-9 ?
There is none.
Joerg
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