All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dietmar Maurer <dietmar@proxmox.com>
To: Sergio Lopez <slp@redhat.com>, Max Reitz <mreitz@redhat.com>
Cc: kwolf@redhat.com, "jsnow@redhat.com" <jsnow@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	Stefan Hajnoczi <stefanha@redhat.com>
Subject: Re: backup transaction with io-thread core dumps
Date: Wed, 25 Mar 2020 13:29:48 +0100 (CET)	[thread overview]
Message-ID: <523142611.32.1585139388758@webmail.proxmox.com> (raw)
In-Reply-To: <20200325114639.rxwhs7h4bkxhkgsu@dritchie>

> As expected, if both BDS are running on the same IOThread (and thus,
> the same AioContext), the problem is not reproducible.
> 
> In a general sense, we could say that completion modes other than
> "individual" are not supported for a transaction that may access
> different AioContexts. I don't see a safe an easy way to fix this. We
> could opt for simply detect and forbid such completion modes when the
> BDS's are assigned to different AioContexts. Perhaps Kevin (in CC) has
> a better idea.

So the solution is to disable backups when using io-threads?



  reply	other threads:[~2020-03-25 12:30 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-24 11:13 backup transaction with io-thread core dumps Dietmar Maurer
2020-03-24 13:30 ` Dietmar Maurer
2020-03-24 13:33   ` Dietmar Maurer
2020-03-24 13:44     ` John Snow
2020-03-24 14:00       ` Dietmar Maurer
2020-03-24 13:47     ` Max Reitz
2020-03-24 14:02       ` Dietmar Maurer
2020-03-24 16:49       ` Dietmar Maurer
2020-03-25 11:40         ` Stefan Reiter
2020-03-25 12:23           ` Vladimir Sementsov-Ogievskiy
2020-03-25 15:50             ` [PATCH] backup: don't acquire aio_context in backup_clean Stefan Reiter
2020-03-26  5:54               ` Vladimir Sementsov-Ogievskiy
2020-03-26  9:43                 ` Stefan Reiter
2020-03-26 12:46                   ` Vladimir Sementsov-Ogievskiy
2020-03-26 11:53                 ` Sergio Lopez
2020-03-25  8:13       ` backup transaction with io-thread core dumps Sergio Lopez
2020-03-25 11:46         ` Sergio Lopez
2020-03-25 12:29           ` Dietmar Maurer [this message]
2020-03-25 12:39             ` Sergio Lopez
2020-03-25 15:40               ` Dietmar Maurer
2020-03-26  7:50                 ` Sergio Lopez
2020-03-26  8:14                   ` Dietmar Maurer
2020-03-26  9:23                     ` Dietmar Maurer

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=523142611.32.1585139388758@webmail.proxmox.com \
    --to=dietmar@proxmox.com \
    --cc=jsnow@redhat.com \
    --cc=kwolf@redhat.com \
    --cc=mreitz@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=slp@redhat.com \
    --cc=stefanha@redhat.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.