[Libguestfs] [nbdkit PATCH 0/2] Improve shutdown race in nbd plugin

I still need more soak time on testing, to see whether I can: a) reproduce the hang with patch 2 not applied b) feel confident that patch 2 is sufficient to fix the race, or else determine that I also need to augment the loop condition in the reader thread to additionally break out of the loop when the pipe-to-self sees EOF even when nbd_aio_is_dead() has not yet been satisfied I'm also fairly confident that I'll need to patch libnbd to call shutdown(SHUT_WR) on plaintext and gnutls_bye(GNUTLS_SHUT_WR) on TLS connections after sending NBD_CMD_DISC, as that is something we lowt when the nbd plugin switched to libnbd, even after documenting in commit 430f8141 why it is important for preventing shutdown deadlocks. Eric Blake (2): nbd: Don't reference stale errno in reader loop nbd: Reorder cleanup to avoid getting stuck in poll() plugins/nbd/nbd.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) -- 2.26.0.rc2