Displaying 20 results from an estimated 205 matches for "mmu_notifier".
2019 Nov 05
1
[PATCH v2 01/15] mm/mmu_notifier: define the header pre-processor parts even if disabled
On 10/28/19 1:10 PM, Jason Gunthorpe wrote:
> From: Jason Gunthorpe <jgg at mellanox.com>
>
> Now that we have KERNEL_HEADER_TEST all headers are generally compile
> tested, so relying on makefile tricks to avoid compiling code that depends
> on CONFIG_MMU_NOTIFIER is more annoying.
>
> Instead follow the usual pattern and provide most of the header with only
> the functions stubbed out when CONFIG_MMU_NOTIFIER is disabled. This
> ensures code compiles no matter what the config setting is.
>
> While here, struct mmu_notifier_mm is private...
2019 Oct 28
0
[PATCH v2 01/15] mm/mmu_notifier: define the header pre-processor parts even if disabled
From: Jason Gunthorpe <jgg at mellanox.com>
Now that we have KERNEL_HEADER_TEST all headers are generally compile
tested, so relying on makefile tricks to avoid compiling code that depends
on CONFIG_MMU_NOTIFIER is more annoying.
Instead follow the usual pattern and provide most of the header with only
the functions stubbed out when CONFIG_MMU_NOTIFIER is disabled. This
ensures code compiles no matter what the config setting is.
While here, struct mmu_notifier_mm is private to mmu_notifier.c, move it.
R...
2019 Nov 12
0
[PATCH v3 01/14] mm/mmu_notifier: define the header pre-processor parts even if disabled
From: Jason Gunthorpe <jgg at mellanox.com>
Now that we have KERNEL_HEADER_TEST all headers are generally compile
tested, so relying on makefile tricks to avoid compiling code that depends
on CONFIG_MMU_NOTIFIER is more annoying.
Instead follow the usual pattern and provide most of the header with only
the functions stubbed out when CONFIG_MMU_NOTIFIER is disabled. This
ensures code compiles no matter what the config setting is.
While here, struct mmu_notifier_mm is private to mmu_notifier.c, move it.
R...
2020 Jan 13
0
[PATCH v6 4/6] mm/mmu_notifier: add mmu_interval_notifier_find()
...mmu interval
notifiers. Rather than forcing drivers to duplicate the interval tree,
provide an API to look up intervals that are registered and accessor
functions to return the start and last address of the interval.
Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
---
include/linux/mmu_notifier.h | 15 +++++++++++++++
mm/mmu_notifier.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 48 insertions(+)
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 0ce59b4f22c2..cdbbad13b278 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/linux/mmu...
2020 Jan 13
0
[PATCH v6 1/6] mm/mmu_notifier: add mmu_interval_notifier_insert_safe()
...terval needs to be split in order to
continue receiving callbacks for the remaining left and right intervals.
Add a new function mmu_interval_notifier_insert_safe() which can be called
from the invalidate() callback.
Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
---
include/linux/mmu_notifier.h | 4 ++++
mm/mmu_notifier.c | 45 ++++++++++++++++++++++++++++++++----
2 files changed, 45 insertions(+), 4 deletions(-)
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 9e6caa8ecd19..027c9c8f3a69 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/l...
2020 Jan 13
0
[PATCH v6 2/6] mm/mmu_notifier: add mmu_interval_notifier_put()
...tion mmu_interval_notifier_put() which is safe to call from
the invalidate() callback. The ops->release() function will be called when
all callbacks are finished and no CPUs are accessing the
mmu_interval_notifier.
Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
---
include/linux/mmu_notifier.h | 6 +++
mm/mmu_notifier.c | 86 ++++++++++++++++++++++++++++--------
2 files changed, 74 insertions(+), 18 deletions(-)
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 027c9c8f3a69..6dcaa632eef7 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/l...
2019 Nov 06
0
[PATCH v2 01/15] mm/mmu_notifier: define the header pre-processor parts even if disabled
...On 10/28/19 1:10 PM, Jason Gunthorpe wrote:
> > From: Jason Gunthorpe <jgg at mellanox.com>
> >
> > Now that we have KERNEL_HEADER_TEST all headers are generally compile
> > tested, so relying on makefile tricks to avoid compiling code that depends
> > on CONFIG_MMU_NOTIFIER is more annoying.
> >
> > Instead follow the usual pattern and provide most of the header with only
> > the functions stubbed out when CONFIG_MMU_NOTIFIER is disabled. This
> > ensures code compiles no matter what the config setting is.
> >
> > While here, stru...
2019 Jun 05
0
[vhost:linux-next 12/19] drivers/vhost/vhost.h:196:22: error: field 'mmu_notifier' has incomplete type
...GCC_VERSION=7.4.0 make.cross ARCH=mips
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp at intel.com>
All errors (new ones prefixed by >>):
In file included from drivers/vhost/net.c:37:0:
>> drivers/vhost/vhost.h:196:22: error: field 'mmu_notifier' has incomplete type
struct mmu_notifier mmu_notifier;
^~~~~~~~~~~~
vim +/mmu_notifier +196 drivers/vhost/vhost.h
193
194 struct vhost_dev {
195 struct mm_struct *mm;
> 196 struct mmu_notifier mmu_notifier;
197 struct mutex mutex;
198 stru...
2019 Oct 29
1
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
I haven't had enough time to fully understand the deferred logic in this
change. I spotted one problem, see comments inline.
On 2019-10-28 4:10 p.m., Jason Gunthorpe wrote:
> From: Jason Gunthorpe <jgg at mellanox.com>
>
> Of the 13 users of mmu_notifiers, 8 of them use only
> invalidate_range_start/end() and immediately intersect the
> mmu_notifier_range with some kind of internal list of VAs. 4 use an
> interval tree (i915_gem, radeon_mn, umem_odp, hfi1). 4 use a linked list
> of some kind (scif_dma, vhost, gntdev, hmm)
>
> And...
2020 Jan 13
0
[PATCH v6 3/6] mm/notifier: add mmu_interval_notifier_update()
...per function
to allow the interval to be updated safely from the ops->invalidate()
callback in response to VMA range changes. This is effectively removing
and inserting the mmu interval notifier but more efficient.
Signed-off-by: Ralph Campbell <rcampbell at nvidia.com>
---
include/linux/mmu_notifier.h | 4 +++
mm/mmu_notifier.c | 69 ++++++++++++++++++++++++++++++++++--
2 files changed, 70 insertions(+), 3 deletions(-)
diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h
index 6dcaa632eef7..0ce59b4f22c2 100644
--- a/include/linux/mmu_notifier.h
+++ b/include/li...
2020 Jan 14
2
[PATCH v6 4/6] mm/mmu_notifier: add mmu_interval_notifier_find()
On Mon, Jan 13, 2020 at 02:47:01PM -0800, Ralph Campbell wrote:
> diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
> index 47ad9cc89aab..4efecc0f13cb 100644
> +++ b/mm/mmu_notifier.c
> @@ -1171,6 +1171,39 @@ void mmu_interval_notifier_update(struct mmu_interval_notifier *mni,
> }
> EXPORT_SYMBOL_GPL(mmu_interval_notifier_update);
>
> +struct mmu_interval_notifier *...
2019 Nov 12
0
[PATCH v3 02/14] mm/mmu_notifier: add an interval tree notifier
From: Jason Gunthorpe <jgg at mellanox.com>
Of the 13 users of mmu_notifiers, 8 of them use only
invalidate_range_start/end() and immediately intersect the
mmu_notifier_range with some kind of internal list of VAs. 4 use an
interval tree (i915_gem, radeon_mn, umem_odp, hfi1). 4 use a linked list
of some kind (scif_dma, vhost, gntdev, hmm)
And the remaining 5 either don...
2019 Oct 28
0
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
From: Jason Gunthorpe <jgg at mellanox.com>
Of the 13 users of mmu_notifiers, 8 of them use only
invalidate_range_start/end() and immediately intersect the
mmu_notifier_range with some kind of internal list of VAs. 4 use an
interval tree (i915_gem, radeon_mn, umem_odp, hfi1). 4 use a linked list
of some kind (scif_dma, vhost, gntdev, hmm)
And the remaining 5 either don...
2019 Nov 12
0
[PATCH v3 13/14] mm/hmm: remove hmm_mirror and related
...efore the callback returns. All future access should
- * fault.
- */
- void (*release)(struct hmm_mirror *mirror);
-
- /* sync_cpu_device_pagetables() - synchronize page tables
- *
- * @mirror: pointer to struct hmm_mirror
- * @update: update information (see struct mmu_notifier_range)
- * Return: -EAGAIN if update.blockable false and callback need to
- * block, 0 otherwise.
- *
- * This callback ultimately originates from mmu_notifiers when the CPU
- * page table is updated. The device driver must update its page table
- * in response...
2019 Nov 23
1
[PATCH v3 02/14] mm/mmu_notifier: add an interval tree notifier
On 11/13/19 8:46 AM, Jason Gunthorpe wrote:
> On Wed, Nov 13, 2019 at 05:59:52AM -0800, Christoph Hellwig wrote:
>>> +int mmu_interval_notifier_insert(struct mmu_interval_notifier *mni,
>>> + struct mm_struct *mm, unsigned long start,
>>> + unsigned long length,
>>> + const struct mmu_interval_notifier_ops *ops);
>>> +int
2020 Jan 15
0
[PATCH v6 4/6] mm/mmu_notifier: add mmu_interval_notifier_find()
On 1/14/20 4:49 AM, Jason Gunthorpe wrote:
> On Mon, Jan 13, 2020 at 02:47:01PM -0800, Ralph Campbell wrote:
>> diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
>> index 47ad9cc89aab..4efecc0f13cb 100644
>> +++ b/mm/mmu_notifier.c
>> @@ -1171,6 +1171,39 @@ void mmu_interval_notifier_update(struct mmu_interval_notifier *mni,
>> }
>> EXPORT_SYMBOL_GPL(mmu_interval_notifier_update);
>>
>>...
2019 Nov 07
0
[PATCH v2 02/15] mm/mmu_notifier: add an interval tree notifier
On 11/7/19 12:06 PM, Jason Gunthorpe wrote:
...
>>
>> Also, it is best moved down to be next to the new MNR structs, so that all the
>> MNR stuff is in one group.
>
> I agree with Jerome, this enum is part of the 'struct
> mmu_notifier_range' (ie the description of the invalidation) and it
> doesn't really matter that only these new notifiers can be called with
> this type, it is still part of the mmu_notifier_range.
>
OK.
> The comment already says it only applies to the mmu_range_notifier
> scheme..
&g...
2019 Jul 23
1
[PATCH 2/6] vhost: validate MMU notifier registration
On Tue, Jul 23, 2019 at 03:57:14AM -0400, Jason Wang wrote:
> The return value of mmu_notifier_register() is not checked in
> vhost_vring_set_num_addr(). This will cause an out of sync between mm
> and MMU notifier thus a double free. To solve this, introduce a
> boolean flag to track whether MMU notifier is registered and only do
> unregistering when it was true.
>
> Repo...
2020 Jul 10
1
[PATCH 3/5] mm/notifier: add migration invalidation type
On Mon, Jul 06, 2020 at 03:23:45PM -0700, Ralph Campbell wrote:
> Currently migrate_vma_setup() calls mmu_notifier_invalidate_range_start()
> which flushes all device private page mappings whether or not a page
> is being migrated to/from device private memory. In order to not disrupt
> device mappings that are not being migrated, shift the responsibility
> for clearing device private mappings to th...
2019 Oct 28
32
[PATCH v2 00/15] Consolidate the mmu notifier interval_tree and locking
From: Jason Gunthorpe <jgg at mellanox.com>
8 of the mmu_notifier using drivers (i915_gem, radeon_mn, umem_odp, hfi1,
scif_dma, vhost, gntdev, hmm) drivers are using a common pattern where
they only use invalidate_range_start/end and immediately check the
invalidating range against some driver data structure to tell if the
driver is interested. Half of them use a...