All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lukas Straub <lukasstraub2@web.de>
To: qemu-devel@nongnu.org
Cc: Peter Xu <peterx@redhat.com>, Fabiano Rosas <farosas@suse.de>,
	yong.huang@smartx.com
Subject: Re: [PATCH] multifd: Make the main thread yield periodically to the main loop
Date: Thu, 7 Aug 2025 11:36:39 +0200	[thread overview]
Message-ID: <20250807113639.66d1c5bf@penguin> (raw)
In-Reply-To: <5512220e1005ae2bc7357b2def32639d164e84eb.1754534263.git.yong.huang@smartx.com>

[-- Attachment #1: Type: text/plain, Size: 762 bytes --]

On Thu,  7 Aug 2025 10:41:17 +0800
yong.huang@smartx.com wrote:

> From: Hyman Huang <yong.huang@smartx.com>
> 
> When there are network issues like missing TCP ACKs on the send
> side during the multifd live migration. At the send side, the error
> "Connection timed out" is thrown out and source QEMU process stop
> sending data, at the receive side, The IO-channels may be blocked
> at recvmsg() and thus the main loop gets stuck and fails to respond
> to QMP commands consequently.
> ...

Hi Hyman Huang,

Have you tried the 'yank' command to shutdown the sockets? It exactly
meant to recover from hangs and should solve your issue.

https://www.qemu.org/docs/master/interop/qemu-qmp-ref.html#yank-feature

Best regards,
Lukas Straub

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

  parent reply	other threads:[~2025-08-07  9:37 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-07  2:41 [PATCH] multifd: Make the main thread yield periodically to the main loop yong.huang
2025-08-07  9:32 ` Lukas Straub
2025-08-07  9:36 ` Lukas Straub [this message]
2025-08-08  2:36   ` Yong Huang
2025-08-08  7:01     ` Lukas Straub
2025-08-08  8:02       ` Yong Huang
2025-08-08 13:55         ` Fabiano Rosas
2025-08-08 15:37           ` Peter Xu
2025-08-11  2:25             ` Yong Huang
2025-08-11  7:03             ` Lukas Straub
2025-08-11 13:53               ` Fabiano Rosas
2025-08-19 10:31                 ` Daniel P. Berrangé
2025-08-19 12:03                   ` Lukas Straub
2025-08-19 12:07                     ` Daniel P. Berrangé
2025-08-19 20:03                       ` Peter Xu
2025-08-11  2:27           ` Yong Huang
2025-08-08  6:36 ` Yong Huang
2025-08-08 15:42 ` Peter Xu
2025-08-11  2:02   ` Yong Huang
2025-08-19 10:19 ` Daniel P. Berrangé

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20250807113639.66d1c5bf@penguin \
    --to=lukasstraub2@web.de \
    --cc=farosas@suse.de \
    --cc=peterx@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=yong.huang@smartx.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.