On 2/8/19 2:32 AM, Mike Rapoport wrote:
On Thu, Feb 07, 2019 at 11:56:48PM -0800, john.hubb...@gmail.com wrote:
From: John Hubbard
[...]
+/**
+ * put_user_page() - release a gup-pinned page
+ * @page:pointer to page to be released
+ *
+ * Pages that were pinned via
On Thu, Feb 07, 2019 at 11:56:48PM -0800, john.hubb...@gmail.com wrote:
> From: John Hubbard
>
> Introduces put_user_page(), which simply calls put_page().
> This provides a way to update all get_user_pages*() callers,
> so that they call put_user_page(), instead of put_page().
>
> Also
On 1/29/19 2:12 AM, Jan Kara wrote:
> On Mon 28-01-19 22:41:41, John Hubbard wrote:
[...]
>> Here is the case I'm wondering about:
>>
>> thread A thread B
>>
>> gup_fast
>> page_mkclean
On Mon 28-01-19 22:41:41, John Hubbard wrote:
> On 1/28/19 5:23 PM, Jerome Glisse wrote:
> > On Mon, Jan 28, 2019 at 04:22:16PM -0800, John Hubbard wrote:
> > > On 1/23/19 11:04 AM, Jerome Glisse wrote:
> > > > On Wed, Jan 23, 2019 at 07:02:30PM +0100, Jan Kara wrote:
> > > > > On Tue 22-01-19
On 1/28/19 5:23 PM, Jerome Glisse wrote:
On Mon, Jan 28, 2019 at 04:22:16PM -0800, John Hubbard wrote:
On 1/23/19 11:04 AM, Jerome Glisse wrote:
On Wed, Jan 23, 2019 at 07:02:30PM +0100, Jan Kara wrote:
On Tue 22-01-19 11:46:13, Jerome Glisse wrote:
On Tue, Jan 22, 2019 at 04:24:59PM +0100,
On Mon, Jan 28, 2019 at 04:22:16PM -0800, John Hubbard wrote:
> On 1/23/19 11:04 AM, Jerome Glisse wrote:
> > On Wed, Jan 23, 2019 at 07:02:30PM +0100, Jan Kara wrote:
> >> On Tue 22-01-19 11:46:13, Jerome Glisse wrote:
> >>> On Tue, Jan 22, 2019 at 04:24:59PM +0100, Jan Kara wrote:
> On Thu
On 1/23/19 11:04 AM, Jerome Glisse wrote:
> On Wed, Jan 23, 2019 at 07:02:30PM +0100, Jan Kara wrote:
>> On Tue 22-01-19 11:46:13, Jerome Glisse wrote:
>>> On Tue, Jan 22, 2019 at 04:24:59PM +0100, Jan Kara wrote:
On Thu 17-01-19 10:17:59, Jerome Glisse wrote:
> On Thu, Jan 17, 2019 at
On Wed, Jan 23, 2019 at 07:02:30PM +0100, Jan Kara wrote:
> On Tue 22-01-19 11:46:13, Jerome Glisse wrote:
> > On Tue, Jan 22, 2019 at 04:24:59PM +0100, Jan Kara wrote:
> > > On Thu 17-01-19 10:17:59, Jerome Glisse wrote:
> > > > On Thu, Jan 17, 2019 at 10:30:47AM +0100, Jan Kara wrote:
> > > > >
On Tue 22-01-19 11:46:13, Jerome Glisse wrote:
> On Tue, Jan 22, 2019 at 04:24:59PM +0100, Jan Kara wrote:
> > On Thu 17-01-19 10:17:59, Jerome Glisse wrote:
> > > On Thu, Jan 17, 2019 at 10:30:47AM +0100, Jan Kara wrote:
> > > > On Wed 16-01-19 08:08:14, Jerome Glisse wrote:
> > > > > On Wed, Jan
On Tue, Jan 22, 2019 at 04:24:59PM +0100, Jan Kara wrote:
> On Thu 17-01-19 10:17:59, Jerome Glisse wrote:
> > On Thu, Jan 17, 2019 at 10:30:47AM +0100, Jan Kara wrote:
> > > On Wed 16-01-19 08:08:14, Jerome Glisse wrote:
> > > > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> > > > >
On Thu 17-01-19 10:17:59, Jerome Glisse wrote:
> On Thu, Jan 17, 2019 at 10:30:47AM +0100, Jan Kara wrote:
> > On Wed 16-01-19 08:08:14, Jerome Glisse wrote:
> > > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> > > > On Tue 15-01-19 09:07:59, Jan Kara wrote:
> > > > > Agreed. So with
On Fri, Jan 18, 2019 at 11:16:08AM +1100, Dave Chinner wrote:
> On Thu, Jan 17, 2019 at 10:21:08AM -0500, Jerome Glisse wrote:
> > On Wed, Jan 16, 2019 at 09:42:25PM -0800, John Hubbard wrote:
> > > On 1/16/19 5:08 AM, Jerome Glisse wrote:
> > > > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara
On Thu, Jan 17, 2019 at 10:21:08AM -0500, Jerome Glisse wrote:
> On Wed, Jan 16, 2019 at 09:42:25PM -0800, John Hubbard wrote:
> > On 1/16/19 5:08 AM, Jerome Glisse wrote:
> > > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> > >> That actually touches on another question I wanted to
On Wed, Jan 16, 2019 at 09:42:25PM -0800, John Hubbard wrote:
> On 1/16/19 5:08 AM, Jerome Glisse wrote:
> > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> >> On Tue 15-01-19 09:07:59, Jan Kara wrote:
> >>> Agreed. So with page lock it would actually look like:
> >>>
> >>>
On Thu, Jan 17, 2019 at 10:30:47AM +0100, Jan Kara wrote:
> On Wed 16-01-19 08:08:14, Jerome Glisse wrote:
> > On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> > > On Tue 15-01-19 09:07:59, Jan Kara wrote:
> > > > Agreed. So with page lock it would actually look like:
> > > >
> > > >
On Wed 16-01-19 08:08:14, Jerome Glisse wrote:
> On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> > On Tue 15-01-19 09:07:59, Jan Kara wrote:
> > > Agreed. So with page lock it would actually look like:
> > >
> > > get_page_pin()
> > > lock_page(page);
> > > wait_for_stable_page();
On Wed 16-01-19 21:25:05, John Hubbard wrote:
> On 1/15/19 12:07 AM, Jan Kara wrote:
> > [...]
> >>> Also there is one more idea I had how to record number of pins in the
> >>> page:
> >>>
> >>> #define PAGE_PIN_BIAS 1024
> >>>
> >>> get_page_pin()
> >>> atomic_add(>_refcount,
On 1/16/19 5:08 AM, Jerome Glisse wrote:
> On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
>> On Tue 15-01-19 09:07:59, Jan Kara wrote:
>>> Agreed. So with page lock it would actually look like:
>>>
>>> get_page_pin()
>>> lock_page(page);
>>> wait_for_stable_page();
>>>
On 1/15/19 12:07 AM, Jan Kara wrote:
> [...]
>>> Also there is one more idea I had how to record number of pins in the page:
>>>
>>> #define PAGE_PIN_BIAS 1024
>>>
>>> get_page_pin()
>>> atomic_add(>_refcount, PAGE_PIN_BIAS);
>>>
>>> put_page_pin();
>>> atomic_add(>_refcount,
On Wed, Jan 16, 2019 at 09:50:16AM -0500, Jerome Glisse wrote:
> On Wed, Jan 16, 2019 at 03:34:55PM +1100, Dave Chinner wrote:
> > On Tue, Jan 15, 2019 at 09:23:12PM -0500, Jerome Glisse wrote:
> > > On Tue, Jan 15, 2019 at 06:01:09PM -0800, Dan Williams wrote:
> > > > On Tue, Jan 15, 2019 at 5:56
On Wed, Jan 16, 2019 at 03:34:55PM +1100, Dave Chinner wrote:
> On Tue, Jan 15, 2019 at 09:23:12PM -0500, Jerome Glisse wrote:
> > On Tue, Jan 15, 2019 at 06:01:09PM -0800, Dan Williams wrote:
> > > On Tue, Jan 15, 2019 at 5:56 PM Jerome Glisse wrote:
> > > > On Tue, Jan 15, 2019 at 04:44:41PM
On Wed, Jan 16, 2019 at 12:38:19PM +0100, Jan Kara wrote:
> On Tue 15-01-19 09:07:59, Jan Kara wrote:
> > Agreed. So with page lock it would actually look like:
> >
> > get_page_pin()
> > lock_page(page);
> > wait_for_stable_page();
> > atomic_add(>_refcount, PAGE_PIN_BIAS);
> >
On Tue 15-01-19 09:07:59, Jan Kara wrote:
> Agreed. So with page lock it would actually look like:
>
> get_page_pin()
> lock_page(page);
> wait_for_stable_page();
> atomic_add(>_refcount, PAGE_PIN_BIAS);
> unlock_page(page);
>
> And if we perform page_pinned() check under
On Tue, Jan 15, 2019 at 09:23:12PM -0500, Jerome Glisse wrote:
> On Tue, Jan 15, 2019 at 06:01:09PM -0800, Dan Williams wrote:
> > On Tue, Jan 15, 2019 at 5:56 PM Jerome Glisse wrote:
> > > On Tue, Jan 15, 2019 at 04:44:41PM -0800, John Hubbard wrote:
> > [..]
> > > To make it clear.
> > >
> > >
On Tue, Jan 15, 2019 at 06:01:09PM -0800, Dan Williams wrote:
> On Tue, Jan 15, 2019 at 5:56 PM Jerome Glisse wrote:
> > On Tue, Jan 15, 2019 at 04:44:41PM -0800, John Hubbard wrote:
> [..]
> > To make it clear.
> >
> > Lock code:
> > GUP()
> > ...
> > lock_page(page);
> >
On Tue, Jan 15, 2019 at 5:56 PM Jerome Glisse wrote:
> On Tue, Jan 15, 2019 at 04:44:41PM -0800, John Hubbard wrote:
[..]
> To make it clear.
>
> Lock code:
> GUP()
> ...
> lock_page(page);
> if (PageWriteback(page)) {
> unlock_page(page);
>
On Tue, Jan 15, 2019 at 04:44:41PM -0800, John Hubbard wrote:
> On 1/15/19 2:12 PM, Jerome Glisse wrote:
> > On Tue, Jan 15, 2019 at 01:56:51PM -0800, John Hubbard wrote:
> >> On 1/15/19 9:15 AM, Jerome Glisse wrote:
> >>> On Tue, Jan 15, 2019 at 09:07:59AM +0100, Jan Kara wrote:
> On Mon
On 1/15/19 2:12 PM, Jerome Glisse wrote:
> On Tue, Jan 15, 2019 at 01:56:51PM -0800, John Hubbard wrote:
>> On 1/15/19 9:15 AM, Jerome Glisse wrote:
>>> On Tue, Jan 15, 2019 at 09:07:59AM +0100, Jan Kara wrote:
On Mon 14-01-19 12:21:25, Jerome Glisse wrote:
> On Mon, Jan 14, 2019 at
On Tue, Jan 15, 2019 at 01:56:51PM -0800, John Hubbard wrote:
> On 1/15/19 9:15 AM, Jerome Glisse wrote:
> > On Tue, Jan 15, 2019 at 09:07:59AM +0100, Jan Kara wrote:
> >> On Mon 14-01-19 12:21:25, Jerome Glisse wrote:
> >>> On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
> On Fri
On 1/15/19 9:15 AM, Jerome Glisse wrote:
> On Tue, Jan 15, 2019 at 09:07:59AM +0100, Jan Kara wrote:
>> On Mon 14-01-19 12:21:25, Jerome Glisse wrote:
>>> On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
On Fri 11-01-19 19:06:08, John Hubbard wrote:
> On 1/11/19 6:46 PM, Jerome
On 1/15/19 12:34 AM, Jan Kara wrote:
> On Mon 14-01-19 11:09:20, John Hubbard wrote:
>> On 1/14/19 9:21 AM, Jerome Glisse wrote:
[...]
>
>> For example, the following already survives a basic boot to graphics mode.
>> It requires a bunch of callsite conversions, and a page flag (neither of
On Tue, Jan 15, 2019 at 09:07:59AM +0100, Jan Kara wrote:
> On Mon 14-01-19 12:21:25, Jerome Glisse wrote:
> > On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
> > > On Fri 11-01-19 19:06:08, John Hubbard wrote:
> > > > On 1/11/19 6:46 PM, Jerome Glisse wrote:
> > > > > On Fri, Jan 11,
On Mon 14-01-19 11:09:20, John Hubbard wrote:
> On 1/14/19 9:21 AM, Jerome Glisse wrote:
> >>
> >> Also there is one more idea I had how to record number of pins in the page:
> >>
> >> #define PAGE_PIN_BIAS 1024
> >>
> >> get_page_pin()
> >>atomic_add(>_refcount, PAGE_PIN_BIAS);
> >>
> >>
On Mon 14-01-19 12:21:25, Jerome Glisse wrote:
> On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
> > On Fri 11-01-19 19:06:08, John Hubbard wrote:
> > > On 1/11/19 6:46 PM, Jerome Glisse wrote:
> > > > On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> > > > [...]
> > > >
>
On 1/14/19 9:21 AM, Jerome Glisse wrote:
> On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
>> On Fri 11-01-19 19:06:08, John Hubbard wrote:
>>> On 1/11/19 6:46 PM, Jerome Glisse wrote:
On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
[...]
>>> The other
On Mon, Jan 14, 2019 at 03:54:47PM +0100, Jan Kara wrote:
> On Fri 11-01-19 19:06:08, John Hubbard wrote:
> > On 1/11/19 6:46 PM, Jerome Glisse wrote:
> > > On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> > > [...]
> > >
> > The other idea that you and Dan (and maybe others)
On Fri 11-01-19 19:06:08, John Hubbard wrote:
> On 1/11/19 6:46 PM, Jerome Glisse wrote:
> > On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> > [...]
> >
> The other idea that you and Dan (and maybe others) pointed out was a
> debug
> option, which we'll certainly
On 1/11/19 7:25 PM, Jerome Glisse wrote:
[...]
Why is it that page lock cannot be used for gup fast, btw?
>>>
>>> Well it can not happen within the preempt disable section. But after
>>> as a post pass before GUP_fast return and after reenabling preempt then
>>> it is fine like it would be
On Fri, Jan 11, 2019 at 07:06:08PM -0800, John Hubbard wrote:
> On 1/11/19 6:46 PM, Jerome Glisse wrote:
> > On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> >> On 1/11/19 6:02 PM, Jerome Glisse wrote:
> >>> On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
> On
On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> On 1/11/19 6:02 PM, Jerome Glisse wrote:
> > On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
> >> On 1/11/19 8:51 AM, Jerome Glisse wrote:
> >>> On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
> On
On 1/11/19 6:46 PM, Jerome Glisse wrote:
> On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
>> On 1/11/19 6:02 PM, Jerome Glisse wrote:
>>> On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
On 1/11/19 8:51 AM, Jerome Glisse wrote:
> On Thu, Jan 10, 2019 at
On Fri, Jan 11, 2019 at 06:38:44PM -0800, John Hubbard wrote:
> On 1/11/19 6:02 PM, Jerome Glisse wrote:
> > On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
> >> On 1/11/19 8:51 AM, Jerome Glisse wrote:
> >>> On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
> On
On 1/11/19 6:02 PM, Jerome Glisse wrote:
> On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
>> On 1/11/19 8:51 AM, Jerome Glisse wrote:
>>> On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
On 1/3/19 6:44 AM, Jerome Glisse wrote:
> On Thu, Jan 03, 2019 at
On Fri, Jan 11, 2019 at 05:04:05PM -0800, John Hubbard wrote:
> On 1/11/19 8:51 AM, Jerome Glisse wrote:
> > On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
> >> On 1/3/19 6:44 AM, Jerome Glisse wrote:
> >>> On Thu, Jan 03, 2019 at 10:26:54AM +0100, Jan Kara wrote:
> On Wed
On 1/11/19 8:51 AM, Jerome Glisse wrote:
> On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
>> On 1/3/19 6:44 AM, Jerome Glisse wrote:
>>> On Thu, Jan 03, 2019 at 10:26:54AM +0100, Jan Kara wrote:
On Wed 02-01-19 20:55:33, Jerome Glisse wrote:
> On Wed, Dec 19, 2018 at
On Thu, Jan 10, 2019 at 06:59:31PM -0800, John Hubbard wrote:
> On 1/3/19 6:44 AM, Jerome Glisse wrote:
> > On Thu, Jan 03, 2019 at 10:26:54AM +0100, Jan Kara wrote:
> >> On Wed 02-01-19 20:55:33, Jerome Glisse wrote:
> >>> On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> On Tue
On 1/3/19 6:44 AM, Jerome Glisse wrote:
> On Thu, Jan 03, 2019 at 10:26:54AM +0100, Jan Kara wrote:
>> On Wed 02-01-19 20:55:33, Jerome Glisse wrote:
>>> On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> On Tue, Dec 18, 2018 at
On Wed, Jan 02, 2019 at 07:27:17PM -0800, John Hubbard wrote:
> On 1/2/19 5:55 PM, Jerome Glisse wrote:
> > On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> >> On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> >>> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> OK,
On Thu, Jan 03, 2019 at 10:26:54AM +0100, Jan Kara wrote:
> On Wed 02-01-19 20:55:33, Jerome Glisse wrote:
> > On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> > > On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> > > > On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > >
On Wed 02-01-19 20:55:33, Jerome Glisse wrote:
> On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> > On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> > > On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > > > OK, so let's take another look at Jerome's _mapcount idea all by
On 1/2/19 5:55 PM, Jerome Glisse wrote:
> On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
>> On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
>>> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
OK, so let's take another look at Jerome's _mapcount idea all by itself
On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> > On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > > OK, so let's take another look at Jerome's _mapcount idea all by itself
> > > (using
> > > *only* the tracking pinned
On Thu, Dec 20, 2018 at 8:50 AM Jerome Glisse wrote:
>
> On Thu, Dec 20, 2018 at 02:54:49AM -0800, John Hubbard wrote:
> > On 12/19/18 3:08 AM, Jan Kara wrote:
> > > On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> > >> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > >>> OK, so
On Thu, Dec 20, 2018 at 09:33:12AM +1100, Dave Chinner wrote:
> On Wed, Dec 19, 2018 at 12:35:40PM +0100, Jan Kara wrote:
> > On Wed 19-12-18 21:28:25, Dave Chinner wrote:
> > > On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> > > > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave
On Thu, Dec 20, 2018 at 02:54:49AM -0800, John Hubbard wrote:
> On 12/19/18 3:08 AM, Jan Kara wrote:
> > On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> >> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> >>> OK, so let's take another look at Jerome's _mapcount idea all by itself
On Wed, Dec 19, 2018 at 12:08:56PM +0100, Jan Kara wrote:
> On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> > On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > > OK, so let's take another look at Jerome's _mapcount idea all by itself
> > > (using
> > > *only* the tracking pinned
On 12/19/18 3:08 AM, Jan Kara wrote:
> On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
>> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
>>> OK, so let's take another look at Jerome's _mapcount idea all by itself
>>> (using
>>> *only* the tracking pinned pages aspect), given that it
On Thu 20-12-18 09:33:12, Dave Chinner wrote:
> On Wed, Dec 19, 2018 at 12:35:40PM +0100, Jan Kara wrote:
> > On Wed 19-12-18 21:28:25, Dave Chinner wrote:
> > > On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> > > > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
>
On Wed, Dec 19, 2018 at 12:35:40PM +0100, Jan Kara wrote:
> On Wed 19-12-18 21:28:25, Dave Chinner wrote:
> > On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> > > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
> > >
> > > > Essentially, what we are talking about
On Wed, Dec 19, 2018 at 12:35:40PM +0100, Jan Kara wrote:
> On Wed 19-12-18 21:28:25, Dave Chinner wrote:
> > On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> > > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
> > >
> > > > Essentially, what we are talking about
On Wed 19-12-18 10:42:54, Dave Chinner wrote:
> On Tue, Dec 18, 2018 at 11:33:06AM +0100, Jan Kara wrote:
> > On Mon 17-12-18 08:58:19, Dave Chinner wrote:
> > > On Fri, Dec 14, 2018 at 04:43:21PM +0100, Jan Kara wrote:
> > > > Yes, for filesystem it is too late. But the plan we figured back in
>
On Wed 19-12-18 21:28:25, Dave Chinner wrote:
> On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
> >
> > > Essentially, what we are talking about is how to handle broken
> > > hardware. I say we should just brun it
On Tue 18-12-18 21:26:28, Dan Williams wrote:
> On Tue, Dec 18, 2018 at 7:03 PM Jason Gunthorpe wrote:
> >
> > On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
> >
> > > Essentially, what we are talking about is how to handle broken
> > > hardware. I say we should just brun it with
On Tue 18-12-18 21:07:24, Jerome Glisse wrote:
> On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> > OK, so let's take another look at Jerome's _mapcount idea all by itself
> > (using
> > *only* the tracking pinned pages aspect), given that it is the lightest
> > weight
> >
On Tue, Dec 18, 2018 at 08:03:29PM -0700, Jason Gunthorpe wrote:
> On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
>
> > Essentially, what we are talking about is how to handle broken
> > hardware. I say we should just brun it with napalm and thermite
> > (i.e. taint the kernel with
On Tue, Dec 18, 2018 at 7:03 PM Jason Gunthorpe wrote:
>
> On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
>
> > Essentially, what we are talking about is how to handle broken
> > hardware. I say we should just brun it with napalm and thermite
> > (i.e. taint the kernel with
On Wed, Dec 19, 2018 at 10:42:54AM +1100, Dave Chinner wrote:
> Essentially, what we are talking about is how to handle broken
> hardware. I say we should just brun it with napalm and thermite
> (i.e. taint the kernel with "unsupportable hardware") and force
> wait_for_stable_page() to trigger
On Tue, Dec 18, 2018 at 03:29:34PM -0800, John Hubbard wrote:
> On 12/18/18 1:30 AM, Jan Kara wrote:
> > On Mon 17-12-18 10:34:43, Matthew Wilcox wrote:
> >> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> >>> On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
>
On Tue, Dec 18, 2018 at 11:33:06AM +0100, Jan Kara wrote:
> On Mon 17-12-18 08:58:19, Dave Chinner wrote:
> > On Fri, Dec 14, 2018 at 04:43:21PM +0100, Jan Kara wrote:
> > > Hi!
> > >
> > > On Thu 13-12-18 08:46:41, Dave Chinner wrote:
> > > > On Wed, Dec 12, 2018 at 10:03:20AM -0500, Jerome
On 12/18/18 1:30 AM, Jan Kara wrote:
> On Mon 17-12-18 10:34:43, Matthew Wilcox wrote:
>> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
>>> On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
Sure, that's a possibility, but that doesn't close off any race
On Mon 17-12-18 08:58:19, Dave Chinner wrote:
> On Fri, Dec 14, 2018 at 04:43:21PM +0100, Jan Kara wrote:
> > Hi!
> >
> > On Thu 13-12-18 08:46:41, Dave Chinner wrote:
> > > On Wed, Dec 12, 2018 at 10:03:20AM -0500, Jerome Glisse wrote:
> > > > On Mon, Dec 10, 2018 at 11:28:46AM +0100, Jan Kara
On Mon 17-12-18 10:34:43, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > > Sure, that's a possibility, but that doesn't close off any race
> > > conditions because there can be DMA into
On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > > Sure, that's a possibility, but that doesn't close off any race
> > > conditions because there
On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > > Sure, that's a possibility, but that doesn't close off any race
> > > conditions because there
On Mon, Dec 17, 2018 at 01:03:58PM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 03:55:01PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 11:59:22AM -0800, Matthew Wilcox wrote:
> > > On Mon, Dec 17, 2018 at 02:54:08PM -0500, Jerome Glisse wrote:
> > > > On Mon, Dec 17, 2018 at
On Mon, Dec 17, 2018 at 03:55:01PM -0500, Jerome Glisse wrote:
> On Mon, Dec 17, 2018 at 11:59:22AM -0800, Matthew Wilcox wrote:
> > On Mon, Dec 17, 2018 at 02:54:08PM -0500, Jerome Glisse wrote:
> > > On Mon, Dec 17, 2018 at 11:51:51AM -0800, Matthew Wilcox wrote:
> > > > On Mon, Dec 17, 2018 at
On Mon, Dec 17, 2018 at 11:59:22AM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 02:54:08PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 11:51:51AM -0800, Matthew Wilcox wrote:
> > > On Mon, Dec 17, 2018 at 02:48:00PM -0500, Jerome Glisse wrote:
> > > > On Mon, Dec 17, 2018 at
On Mon, Dec 17, 2018 at 02:54:08PM -0500, Jerome Glisse wrote:
> On Mon, Dec 17, 2018 at 11:51:51AM -0800, Matthew Wilcox wrote:
> > On Mon, Dec 17, 2018 at 02:48:00PM -0500, Jerome Glisse wrote:
> > > On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> > > > No. The solution John,
On Mon, Dec 17, 2018 at 11:51:51AM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 02:48:00PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> > > On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > > > On Mon, Dec 17, 2018 at
On Mon, Dec 17, 2018 at 02:48:00PM -0500, Jerome Glisse wrote:
> On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> > On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > > On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > > > Sure, that's a
On Mon, Dec 17, 2018 at 10:34:43AM -0800, Matthew Wilcox wrote:
> On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> > On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > > Sure, that's a possibility, but that doesn't close off any race
> > > conditions because there
On Mon, Dec 17, 2018 at 01:11:50PM -0500, Jerome Glisse wrote:
> On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> > Sure, that's a possibility, but that doesn't close off any race
> > conditions because there can be DMA into the page in progress while
> > the page is being bounced,
On Mon, Dec 17, 2018 at 12:57 AM Jan Kara wrote:
>
> On Fri 14-12-18 11:38:59, Dan Williams wrote:
> > On Thu, Dec 13, 2018 at 10:11 PM John Hubbard wrote:
> > >
> > > On 12/13/18 9:21 PM, Dan Williams wrote:
> > > > On Thu, Dec 13, 2018 at 7:53 PM John Hubbard
> > > > wrote:
> > > >>
> > > >>
On Mon, Dec 17, 2018 at 08:58:19AM +1100, Dave Chinner wrote:
> On Fri, Dec 14, 2018 at 04:43:21PM +0100, Jan Kara wrote:
> > Hi!
> >
> > On Thu 13-12-18 08:46:41, Dave Chinner wrote:
> > > On Wed, Dec 12, 2018 at 10:03:20AM -0500, Jerome Glisse wrote:
> > > > On Mon, Dec 10, 2018 at 11:28:46AM
On Fri 14-12-18 11:38:59, Dan Williams wrote:
> On Thu, Dec 13, 2018 at 10:11 PM John Hubbard wrote:
> >
> > On 12/13/18 9:21 PM, Dan Williams wrote:
> > > On Thu, Dec 13, 2018 at 7:53 PM John Hubbard wrote:
> > >>
> > >> On 12/12/18 4:51 PM, Dave Chinner wrote:
> > >>> On Wed, Dec 12, 2018 at
On Fri, Dec 14, 2018 at 04:43:21PM +0100, Jan Kara wrote:
> Hi!
>
> On Thu 13-12-18 08:46:41, Dave Chinner wrote:
> > On Wed, Dec 12, 2018 at 10:03:20AM -0500, Jerome Glisse wrote:
> > > On Mon, Dec 10, 2018 at 11:28:46AM +0100, Jan Kara wrote:
> > > > On Fri 07-12-18 21:24:46, Jerome Glisse
On 12/14/18 12:03 PM, Matthew Wilcox wrote:
> On Fri, Dec 14, 2018 at 11:53:31AM -0800, Dave Hansen wrote:
>> On 12/14/18 11:48 AM, Matthew Wilcox wrote:
>>> I think we can do better than a proxy object with bit 0 set. I'd go
>>> for allocating something like this:
>>>
>>> struct dynamic_page {
On Fri, Dec 14, 2018 at 12:17:08PM -0800, Dan Williams wrote:
> On Fri, Dec 14, 2018 at 12:03 PM Matthew Wilcox wrote:
> > Yes; working on the pfn-to-page structure right now as it happens ...
> > in the meantime, an XArray for it probably wouldn't be _too_ bad.
>
> It might... see the recent
On Fri, Dec 14, 2018 at 12:03 PM Matthew Wilcox wrote:
>
> On Fri, Dec 14, 2018 at 11:53:31AM -0800, Dave Hansen wrote:
> > On 12/14/18 11:48 AM, Matthew Wilcox wrote:
> > > I think we can do better than a proxy object with bit 0 set. I'd go
> > > for allocating something like this:
> > >
> > >
On Fri, Dec 14, 2018 at 11:53:31AM -0800, Dave Hansen wrote:
> On 12/14/18 11:48 AM, Matthew Wilcox wrote:
> > I think we can do better than a proxy object with bit 0 set. I'd go
> > for allocating something like this:
> >
> > struct dynamic_page {
> > struct page;
> > unsigned long
On 12/14/18 11:48 AM, Matthew Wilcox wrote:
> I think we can do better than a proxy object with bit 0 set. I'd go
> for allocating something like this:
>
> struct dynamic_page {
> struct page;
> unsigned long vaddr;
> unsigned long pfn;
> ...
> };
>
> and use a bit in
On Fri, Dec 14, 2018 at 11:38:59AM -0800, Dan Williams wrote:
> On Thu, Dec 13, 2018 at 10:11 PM John Hubbard wrote:
> > I don't have an answer for that, so maybe the page->mapping idea is dead
> > already.
> >
> > So in that case, there is still one more way to do all of this, which is to
> >
On Thu, Dec 13, 2018 at 10:11 PM John Hubbard wrote:
>
> On 12/13/18 9:21 PM, Dan Williams wrote:
> > On Thu, Dec 13, 2018 at 7:53 PM John Hubbard wrote:
> >>
> >> On 12/12/18 4:51 PM, Dave Chinner wrote:
> >>> On Wed, Dec 12, 2018 at 04:59:31PM -0500, Jerome Glisse wrote:
> On Thu, Dec 13,
Hi!
On Thu 13-12-18 08:46:41, Dave Chinner wrote:
> On Wed, Dec 12, 2018 at 10:03:20AM -0500, Jerome Glisse wrote:
> > On Mon, Dec 10, 2018 at 11:28:46AM +0100, Jan Kara wrote:
> > > On Fri 07-12-18 21:24:46, Jerome Glisse wrote:
> > > So this approach doesn't look like a win to me over using
On Fri, Dec 14, 2018 at 11:41:25AM +0100, Jan Kara wrote:
> On Thu 13-12-18 07:43:25, Jerome Glisse wrote:
> > On Wed, Dec 12, 2018 at 08:20:43PM -0700, Jason Gunthorpe wrote:
> > > On Wed, Dec 12, 2018 at 07:01:09PM -0500, Jerome Glisse wrote:
> > > > > Even the IOMMU idea probably doesn't work,
On Thu, Dec 13, 2018 at 10:11:09PM -0800, John Hubbard wrote:
> On 12/13/18 9:21 PM, Dan Williams wrote:
> > On Thu, Dec 13, 2018 at 7:53 PM John Hubbard wrote:
> >>
> >> On 12/12/18 4:51 PM, Dave Chinner wrote:
> >>> On Wed, Dec 12, 2018 at 04:59:31PM -0500, Jerome Glisse wrote:
> On Thu,
On Fri, Dec 14, 2018 at 05:00:12PM +1100, Dave Chinner wrote:
> On Wed, Dec 12, 2018 at 09:02:29PM -0500, Jerome Glisse wrote:
> > On Thu, Dec 13, 2018 at 11:51:19AM +1100, Dave Chinner wrote:
> > > On Wed, Dec 12, 2018 at 04:59:31PM -0500, Jerome Glisse wrote:
> > > > On Thu, Dec 13, 2018 at
On Thu 13-12-18 07:43:25, Jerome Glisse wrote:
> On Wed, Dec 12, 2018 at 08:20:43PM -0700, Jason Gunthorpe wrote:
> > On Wed, Dec 12, 2018 at 07:01:09PM -0500, Jerome Glisse wrote:
> > > > Even the IOMMU idea probably doesn't work, I doubt all current
> > > > hardware can handle a PCI-E error TLP
On 12/13/18 9:21 PM, Dan Williams wrote:
> On Thu, Dec 13, 2018 at 7:53 PM John Hubbard wrote:
>>
>> On 12/12/18 4:51 PM, Dave Chinner wrote:
>>> On Wed, Dec 12, 2018 at 04:59:31PM -0500, Jerome Glisse wrote:
On Thu, Dec 13, 2018 at 08:46:41AM +1100, Dave Chinner wrote:
> On Wed, Dec 12,
On Wed, Dec 12, 2018 at 09:02:29PM -0500, Jerome Glisse wrote:
> On Thu, Dec 13, 2018 at 11:51:19AM +1100, Dave Chinner wrote:
> > On Wed, Dec 12, 2018 at 04:59:31PM -0500, Jerome Glisse wrote:
> > > On Thu, Dec 13, 2018 at 08:46:41AM +1100, Dave Chinner wrote:
> > > > On Wed, Dec 12, 2018 at
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