From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Steffen Eiden <seiden@linux.ibm.com>,
Alex Williamson <alex.williamson@nvidia.com>
Subject: Re: [PATCH 1/3] VFIO: take reference to the KVM module
Date: Thu, 9 Apr 2026 11:59:01 -0700 [thread overview]
Message-ID: <adf29Rn7q9Db0hxc@google.com> (raw)
In-Reply-To: <20260407180107.1603697-2-pbonzini@redhat.com>
On Tue, Apr 07, 2026, Paolo Bonzini wrote:
> VFIO is implicitly taking a reference to the KVM module between
> vfio_device_get_kvm_safe and vfio_device_put_kvm, thanks to
> symbol_get and symbol_put.
>
> In preparation for removing symbol_get and symbol_put themselves
> from VFIO, actually store a pointer to the KVM module and use
> module_get()/module_put() to keep KVM alive.
NAK? :-)
I really don't think we should do this. We're reinventing the wheel, and probably
doing so poorly. As Jason suggested, the proper way to handle this is to pass
a "struct file" so that e.g. fops_get() pins kvm.ko for us.
https://lore.kernel.org/all/20231203140756.GI1489931@ziepe.ca
next prev parent reply other threads:[~2026-04-09 18:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-07 18:01 [PATCH 0/3] KVM, vfio: remove exported KVM symbols Paolo Bonzini
2026-04-07 18:01 ` [PATCH 1/3] VFIO: take reference to the KVM module Paolo Bonzini
2026-04-09 15:00 ` Steffen Eiden
2026-04-09 18:59 ` Sean Christopherson [this message]
2026-04-07 18:01 ` [PATCH 2/3] KVM, vfio: remove symbol_get(kvm_get_kvm_safe) from vfio Paolo Bonzini
2026-04-09 15:01 ` Steffen Eiden
2026-04-07 18:01 ` [PATCH 3/3] KVM, vfio: remove symbol_get(kvm_put_kvm) " Paolo Bonzini
2026-04-09 15:02 ` Steffen Eiden
2026-04-07 20:16 ` [PATCH 0/3] KVM, vfio: remove exported KVM symbols Alex Williamson
2026-04-09 15:06 ` Steffen Eiden
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=adf29Rn7q9Db0hxc@google.com \
--to=seanjc@google.com \
--cc=alex.williamson@nvidia.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=pbonzini@redhat.com \
--cc=seiden@linux.ibm.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox