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[Qemu-devel] [PATCH 0/3] Migration cancel with dead network
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[Qemu-devel] [PATCH 0/3] Migration cancel with dead network |
Date: |
Thu, 8 Jan 2015 11:11:29 +0000 |
From: "Dr. David Alan Gilbert" <address@hidden>
If the remote host, or networking dies during a migration, the socket can be
waiting for a long timeout, and migration_cancel can't complete the cancel
for a long time (and you can't start a new one to somewhere else).
(Where 'long' is the TCP timeout, that's ~15 mins)
This patch set uses the shutdown(2) syscall to unblock any write/sends that
are in progress to let the migrate_cancel happen quickly.
1/3: socket shutdown - An updated patch from my postcopy world to
add a shut_down method on QEMUFile - only
for 'socket' (where the syscall is supported).
2/3: Handle bi-directional communication for fd migration
- A patch from Cristian Klein to use the socket
QEMUFile for FDs that are passed in, if the FDs
are sockets; this is needed so that libvirt
migrations can take advantage of the other patches.
Again this patch (and its naming) come from the
postcopy world.
3/3: migration_cancel: shutdown migration socket
- A new patch that uses the shutdown in
migrate_fd_cancel
Note this does not fix the timeout if you try to migrate to an already dead
host;
the connect timeout is typically a much shorter 2 minutes anyway.
Dave
Cristian Klein (1):
Handle bi-directional communication for fd migration
Dr. David Alan Gilbert (2):
socket shutdown
migration_cancel: shutdown migration socket
include/migration/qemu-file.h | 10 ++++++++++
include/qemu/sockets.h | 7 +++++++
migration/fd.c | 24 ++++++++++++++++++++++--
migration/migration.c | 12 ++++++++++++
migration/qemu-file-unix.c | 23 +++++++++++++++++++----
migration/qemu-file.c | 12 ++++++++++++
6 files changed, 82 insertions(+), 6 deletions(-)
--
2.1.0
- [Qemu-devel] [PATCH 0/3] Migration cancel with dead network,
Dr. David Alan Gilbert (git) <=
- [Qemu-devel] [PATCH 2/3] Handle bi-directional communication for fd migration, Dr. David Alan Gilbert (git), 2015/01/08
- [Qemu-devel] [PATCH 1/3] socket shutdown, Dr. David Alan Gilbert (git), 2015/01/08
- [Qemu-devel] [PATCH 3/3] migration_cancel: shutdown migration socket, Dr. David Alan Gilbert (git), 2015/01/08
- Re: [Qemu-devel] [PATCH 0/3] Migration cancel with dead network, Daniel P. Berrange, 2015/01/08
- Re: [Qemu-devel] [PATCH 0/3] Migration cancel with dead network, Paolo Bonzini, 2015/01/08
- Re: [Qemu-devel] [PATCH 0/3] Migration cancel with dead network, Amit Shah, 2015/01/09