On Tue, Oct 15, 2019 at 9:12 AM Logan Gunthorpe wrote:
>
>
>
> On 2019-10-15 3:55 a.m., Christoph Hellwig wrote:
> > On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
> >>> My goal is to not modify the Linux NVMe target code at all. The NVMe
> >>> endpoint function driver currently does
On Tue, Oct 15, 2019 at 10:45 AM Logan Gunthorpe wrote:
>
>
>
> On 2019-10-15 11:40 a.m., Alan Mikhak wrote:
> > On Tue, Oct 15, 2019 at 2:55 AM Christoph Hellwig
> > wrote:
> >>
> >> On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
> My goal is to not modify the Linux NVMe targ
On 2019-10-15 11:40 a.m., Alan Mikhak wrote:
> On Tue, Oct 15, 2019 at 2:55 AM Christoph Hellwig wrote:
>>
>> On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
My goal is to not modify the Linux NVMe target code at all. The NVMe
endpoint function driver currently does the w
On Tue, Oct 15, 2019 at 2:55 AM Christoph Hellwig wrote:
>
> On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
> > > My goal is to not modify the Linux NVMe target code at all. The NVMe
> > > endpoint function driver currently does the work that is required.
>
> You will have to do some
On 2019-10-15 3:55 a.m., Christoph Hellwig wrote:
> On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
>>> My goal is to not modify the Linux NVMe target code at all. The NVMe
>>> endpoint function driver currently does the work that is required.
>
> You will have to do some modificat
On Mon, Oct 07, 2019 at 02:13:51PM -0700, Alan Mikhak wrote:
> > My goal is to not modify the Linux NVMe target code at all. The NVMe
> > endpoint function driver currently does the work that is required.
You will have to do some modifications, as for example in PCIe you can
have a n:1 relationshi
On Mon, Oct 7, 2019 at 9:44 AM Alan Mikhak wrote:
>
> On Sun, Oct 6, 2019 at 11:13 PM Christoph Hellwig wrote:
> >
> > On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> > > From: Alan Mikhak
> > >
> > > Modify sg_miter_stop() to validate the page pointer
> > > before calling PageSla
On Sun, Oct 6, 2019 at 11:13 PM Christoph Hellwig wrote:
>
> On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> > From: Alan Mikhak
> >
> > Modify sg_miter_stop() to validate the page pointer
> > before calling PageSlab(). This check prevents a crash
> > that will occur if PageSlab()
On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> From: Alan Mikhak
>
> Modify sg_miter_stop() to validate the page pointer
> before calling PageSlab(). This check prevents a crash
> that will occur if PageSlab() gets called with a page
> pointer that is not backed by page struct.
>
On Tue, Oct 01, 2019 at 09:16:23AM -0300, Jason Gunthorpe wrote:
> > If the virtual address obtained from ioremap() is not
> > backed by a page struct, virt_to_page() returns an
> > invalid page pointer. However, sg_copy_buffer() can
> > correctly recover the original virtual address. Such
> > addr
On Tue, Oct 1, 2019 at 10:44 AM Jason Gunthorpe wrote:
>
> On Tue, Oct 01, 2019 at 10:26:38AM -0700, Alan Mikhak wrote:
>
> > > > Cost of adding page structs to a large PCI I/O address range can be
> > > > quite substantial. Allowing PCI I/O pages without page structs may be
> > > > desirable. Per
On Tue, Oct 01, 2019 at 10:26:38AM -0700, Alan Mikhak wrote:
> > > Cost of adding page structs to a large PCI I/O address range can be
> > > quite substantial. Allowing PCI I/O pages without page structs may be
> > > desirable. Perhaps it is worth considering this cost.
> >
> > This is generally a
On Tue, Oct 1, 2019 at 10:12 AM Jason Gunthorpe wrote:
>
> On Tue, Oct 01, 2019 at 10:09:48AM -0700, Alan Mikhak wrote:
> > On Tue, Oct 1, 2019 at 5:16 AM Jason Gunthorpe wrote:
> > >
> > > On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> > > > From: Alan Mikhak
> > > >
> > > > Mod
On Tue, Oct 01, 2019 at 10:09:48AM -0700, Alan Mikhak wrote:
> On Tue, Oct 1, 2019 at 5:16 AM Jason Gunthorpe wrote:
> >
> > On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> > > From: Alan Mikhak
> > >
> > > Modify sg_miter_stop() to validate the page pointer
> > > before calling Pa
On Tue, Oct 1, 2019 at 5:16 AM Jason Gunthorpe wrote:
>
> On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> > From: Alan Mikhak
> >
> > Modify sg_miter_stop() to validate the page pointer
> > before calling PageSlab(). This check prevents a crash
> > that will occur if PageSlab() get
On Mon, Sep 30, 2019 at 04:22:35PM -0700, Alan Mikhak wrote:
> From: Alan Mikhak
>
> Modify sg_miter_stop() to validate the page pointer
> before calling PageSlab(). This check prevents a crash
> that will occur if PageSlab() gets called with a page
> pointer that is not backed by page struct.
>
From: Alan Mikhak
Modify sg_miter_stop() to validate the page pointer
before calling PageSlab(). This check prevents a crash
that will occur if PageSlab() gets called with a page
pointer that is not backed by page struct.
A virtual address obtained from ioremap() for a physical
address in PCI ad
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