Re: lib/55331: libarchive test now fails randomly on real hardware

[Andreas Gustafsson <gson%gson.org@localhost>]

The following reply was made to PR lib/55331; it has been noted by GNATS.

From: Andreas Gustafsson <gson%gson.org@localhost>
To: gnats-bugs%netbsd.org@localhost, ad%NetBSD.org@localhost
Cc: gson%gson.org@localhost (Andreas Gustafsson)
Subject: Re: lib/55331: libarchive test now fails randomly on real hardware
Date: Tue, 30 Jun 2020 12:34:28 +0300

 Bisection shows the problem started with this commit:
 
   2020.05.24.20.08.26 ad src/sys/fs/tmpfs/tmpfs_vnops.c 1.142
 
   tmpfs_write(): use UBC_FAULTBUSY when extending files, if possible, to avoid
   zeroing of newly allocated pages & fault processing.
 
 The ATF tests use /tmp which is now a tmpfs by default.  I'm guessing
 the new method of extending files has some issue with sparse files.
 -- 
 Andreas Gustafsson, gson%gson.org@localhost