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[Qemu-devel] [PATCH RFC 0/2] Fix migration issues
From: |
Fei Li |
Subject: |
[Qemu-devel] [PATCH RFC 0/2] Fix migration issues |
Date: |
Mon, 22 Oct 2018 19:08:52 +0800 |
Hi,
these two patches are to fix live migration issues. The first is
about multifd, and the second is to fix some error handling.
But I have a question about using multifd migration.
In our current code, when multifd is used during migration, if there
is an error before the destination receives all new channels (I mean
multifd_recv_new_channel(ioc)), the destination does not exit but
keeps waiting (Hang in recvmsg() in qio_channel_socket_readv) until
the source exits.
My question is about the state of the destination host if fails during
this period. I did a test, after applying [1/2] patch, if
multifd_new_send_channel_async() fails, the destination host hangs for
a while then later pops up a window saying
"'QEMU (...) [stopped]' is not responding.
You may choose to wait a short while for it to continue or force
the application to quit entirely."
But after closing the window by clicking, the qemu on the dest still
hangs there until I exclusively kill the qemu on the source.
The source host keeps running as expected, but I guess the hang
phenonmenon in the dest is not right.
Would someone kindly give some suggestions on this? Thanks a lot.
Fei Li (2):
migration: fix the multifd code
migration: fix some error handling
migration/migration.c | 5 +----
migration/postcopy-ram.c | 3 +++
migration/ram.c | 33 +++++++++++++++++++++++----------
migration/ram.h | 2 +-
4 files changed, 28 insertions(+), 15 deletions(-)
--
2.13.7
- [Qemu-devel] [PATCH RFC 0/2] Fix migration issues,
Fei Li <=
- [Qemu-devel] [PATCH RFC 2/2] migration: fix some error handling, Fei Li, 2018/10/22
- [Qemu-devel] [PATCH RFC 1/2] migration: fix the multifd code, Fei Li, 2018/10/22
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Peter Xu, 2018/10/24
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Fei Li, 2018/10/25
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Peter Xu, 2018/10/25
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Fei Li, 2018/10/26
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Peter Xu, 2018/10/26
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Dr. David Alan Gilbert, 2018/10/26
- Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Fei Li, 2018/10/29
Re: [Qemu-devel] [PATCH RFC 0/2] Fix migration issues, Dr. David Alan Gilbert, 2018/10/25