Re: [PATCH 1/2] tests: fix hang in virshtest 'read-big-pipe' case

* On ppc64, testPipeFeeder opens R+W, tries to write 140kb and write() succeeds because the larger 64kb page size resulted in greater buffer capacity for the pipe. It thus quickly closes the pipe, removing the writer, and triggering discard of all the unread data. Now virsh starts up, tries to open the pipe for O_RDONLY and blocks waiting for a new writer to open it, which will never happen. Meson kills it the test after 30 seconds.