On Tue, Oct 19, 2021 at 10:11:34AM -0700, Jacob Pan wrote:
> Hi Jason,
>
> On Tue, 19 Oct 2021 13:57:47 -0300, Jason Gunthorpe wrote:
>
> > On Tue, Oct 19, 2021 at 09:57:34AM -0700, Jacob Pan wrote:
> > > Hi Jason,
> > >
> > > On Fri, 15 Oct 2021 08:18:07 -0300, Jason Gunthorpe
> > > wrote:
>
Hi Jason,
On Tue, 19 Oct 2021 13:57:47 -0300, Jason Gunthorpe wrote:
> On Tue, Oct 19, 2021 at 09:57:34AM -0700, Jacob Pan wrote:
> > Hi Jason,
> >
> > On Fri, 15 Oct 2021 08:18:07 -0300, Jason Gunthorpe
> > wrote:
> > > On Fri, Oct 15, 2021 at 09:18:06AM +, Liu, Yi L wrote:
> > >
> >
On Tue, Oct 19, 2021 at 09:57:34AM -0700, Jacob Pan wrote:
> Hi Jason,
>
> On Fri, 15 Oct 2021 08:18:07 -0300, Jason Gunthorpe wrote:
>
> > On Fri, Oct 15, 2021 at 09:18:06AM +, Liu, Yi L wrote:
> >
> > > > Acquire from the xarray is
> > > >rcu_lock()
> > > >ioas = xa_load()
> > >
Hi Jason,
On Fri, 15 Oct 2021 08:18:07 -0300, Jason Gunthorpe wrote:
> On Fri, Oct 15, 2021 at 09:18:06AM +, Liu, Yi L wrote:
>
> > > Acquire from the xarray is
> > >rcu_lock()
> > >ioas = xa_load()
> > >if (ioas)
> > > if (down_read_trylock(&ioas->destroying_lock))
>
> From: Jason Gunthorpe
> Sent: Friday, October 15, 2021 7:18 PM
>
> On Fri, Oct 15, 2021 at 09:18:06AM +, Liu, Yi L wrote:
>
> > > Acquire from the xarray is
> > >rcu_lock()
> > >ioas = xa_load()
> > >if (ioas)
> > > if (down_read_trylock(&ioas->destroying_lock))
> >
> >
On Fri, Oct 15, 2021 at 09:18:06AM +, Liu, Yi L wrote:
> > Acquire from the xarray is
> >rcu_lock()
> >ioas = xa_load()
> >if (ioas)
> > if (down_read_trylock(&ioas->destroying_lock))
>
> all good suggestions, will refine accordingly. Here destroying_lock is a
> rw_semapho
> From: Jason Gunthorpe
> Sent: Tuesday, September 21, 2021 11:42 PM
>
> On Sun, Sep 19, 2021 at 02:38:29PM +0800, Liu Yi L wrote:
> > /dev/iommu aims to provide a unified interface for managing I/O address
> > spaces for devices assigned to userspace. This patch adds the initial
> > framework to
On Wed, Sep 22, 2021 at 01:59:39PM +, Tian, Kevin wrote:
> > From: Jason Gunthorpe
> > Sent: Wednesday, September 22, 2021 8:41 PM
> >
> > On Wed, Sep 22, 2021 at 01:51:03AM +, Tian, Kevin wrote:
> > > > From: Jason Gunthorpe
> > > > Sent: Tuesday, September 21, 2021 11:42 PM
> > > >
> >
> From: Jason Gunthorpe
> Sent: Wednesday, September 22, 2021 8:41 PM
>
> On Wed, Sep 22, 2021 at 01:51:03AM +, Tian, Kevin wrote:
> > > From: Jason Gunthorpe
> > > Sent: Tuesday, September 21, 2021 11:42 PM
> > >
> > > - Delete the iommufd_ctx->lock. Use RCU to protect load, erase/alloc
>
On Wed, Sep 22, 2021 at 01:51:03AM +, Tian, Kevin wrote:
> > From: Jason Gunthorpe
> > Sent: Tuesday, September 21, 2021 11:42 PM
> >
> > - Delete the iommufd_ctx->lock. Use RCU to protect load, erase/alloc does
> >not need locking (order it properly too, it is in the wrong order), and
>
> From: Jason Gunthorpe
> Sent: Tuesday, September 21, 2021 11:42 PM
>
> - Delete the iommufd_ctx->lock. Use RCU to protect load, erase/alloc does
>not need locking (order it properly too, it is in the wrong order), and
>don't check for duplicate devices or dev_cookie duplication, that
>
On Sun, Sep 19, 2021 at 02:38:29PM +0800, Liu Yi L wrote:
> /dev/iommu aims to provide a unified interface for managing I/O address
> spaces for devices assigned to userspace. This patch adds the initial
> framework to create a /dev/iommu node. Each open of this node returns an
> iommufd. And this
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