Re: kern/52769

[Paul Goyette <paul%whooppee.com@localhost>]

The following reply was made to PR kern/52769; it has been noted by GNATS.

From: Paul Goyette <paul%whooppee.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: chs%NetBSD.org@localhost, gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, 
    martin%NetBSD.org@localhost
Subject: Re: kern/52769
Date: Sun, 4 Mar 2018 22:35:37 +0800 (+08)

 On Sun, 4 Mar 2018, David Holland wrote:
 
 > The following reply was made to PR kern/52769; it has been noted by GNATS.
 >
 > From: David Holland <dholland-bugs%netbsd.org@localhost>
 > To: gnats-bugs%NetBSD.org@localhost
 > Cc:
 > Subject: Re: kern/52769
 > Date: Sun, 4 Mar 2018 08:40:01 +0000
 >
 > On Thu, Mar 01, 2018 at 08:25:01AM +0000, Paul Goyette wrote:
 >  >  It's curious that all reported instances of this PR have involved
 >  >  a "cvs update" getting stuck in biolock, while everything else just
 >  >  ends up in tstile.  I wonder what cvs does that is so different
 >  >  from everything else?
 >
 > tstile is, most of the time, just what happens when things pile up
 > behind other more interesting deadlocks. Though not always.
 >
 > cvs is probably causing it, because cvs does tons of silly metadata
 > operations at high speed.
 >
 > Is this wapbl, or not? If not, they'll be synchronous and that might
 > be causing extra excitement.
 
 In my case YES, this is wapbl.  Not sure about Martin's original case.