Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: Anthony Krowiak <akrowiak@xxxxxxxxxxxxx>
Subject: Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
From: Jason Gunthorpe <jgg@xxxxxxxxxx>
Date: Tue, 31 Jan 2023 10:48:22 -0400
Cc: Yi Liu <yi.l.liu@xxxxxxxxx>, alex.williamson@xxxxxxxxxx, pbonzini@xxxxxxxxxx, mjrosato@xxxxxxxxxxxxx, kevin.tian@xxxxxxxxx, cohuck@xxxxxxxxxx, farman@xxxxxxxxxxxxx, pmorel@xxxxxxxxxxxxx, borntraeger@xxxxxxxxxxxxx, frankja@xxxxxxxxxxxxx, imbrenda@xxxxxxxxxxxxx, david@xxxxxxxxxx, jjherne@xxxxxxxxxxxxx, pasic@xxxxxxxxxxxxx, zhenyuw@xxxxxxxxxxxxxxx, zhi.a.wang@xxxxxxxxx, seanjc@xxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx, intel-gfx@xxxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <b0ed98f6-3586-3151-47e7-9ec86d6c716d@linux.ibm.com>
References: <20230120150528.471752-1-yi.l.liu@intel.com> <67ec09bf-cb24-34e3-6ec4-1ae87b0738bd@linux.ibm.com> <Y9km+xezgD4ovjDX@nvidia.com> <b0ed98f6-3586-3151-47e7-9ec86d6c716d@linux.ibm.com>

On Tue, Jan 31, 2023 at 09:46:18AM -0500, Anthony Krowiak wrote:

> > Maybe you should split that lock and have a dedicated apcb lock?
> 
> I don't think that would suffice for taking the vCPUs out of SIE.

Then I think we have to keep this patch and also do Matthew's patch to
keep kvm refs inside vfio as well.

Jason

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Follow-Ups:
- Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
  - From: Matthew Rosato

References:
- [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
  - From: Yi Liu
- Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
  - From: Anthony Krowiak
- Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
  - From: Jason Gunthorpe
- Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
  - From: Anthony Krowiak

Prev by Date: Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
Next by Date: Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
Previous by thread: Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
Next by thread: Re: [PATCH] kvm/vfio: Fix potential deadlock on vfio group_lock
Index(es):
- Date
- Thread

[Index of Archives] [Kernel Development] [Kernel Newbies] [IDE] [Security] [Git] [Netfilter] [Bugtraq] [Yosemite Info] [MIPS Linux] [ARM Linux] [Linux Security] [Linux RAID] [Linux ATA RAID] [Samba] [Linux Media] [Device Mapper]