* [PATCH 1/2] list: introduce list_bulk_move_tail helper
@ 2018-09-13 11:22 Christian König
2018-09-13 11:22 ` [PATCH 2/2] drm/ttm: once more fix ttm_bo_bulk_move_lru_tail v2 Christian König
2018-09-14 2:53 ` Huang Rui
0 siblings, 2 replies; 5+ messages in thread
From: Christian König @ 2018-09-13 11:22 UTC (permalink / raw)
To: amd-gfx, dri-devel, linux-kernel
Move all entries between @first and including @last before @head.
This is useful for LRU lists where a whole block of entries should be
moved to the end of an list.
Signed-off-by: Christian König <christian.koenig@amd.com>
---
include/linux/list.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/include/linux/list.h b/include/linux/list.h
index de04cc5ed536..edb7628e46ed 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -183,6 +183,29 @@ static inline void list_move_tail(struct list_head *list,
list_add_tail(list, head);
}
+/**
+ * list_bulk_move_tail - move a subsection of a list to its tail
+ * @head: the head that will follow our entry
+ * @first: first entry to move
+ * @last: last entry to move, can be the same as first
+ *
+ * Move all entries between @first and including @last before @head.
+ * All three entries must belong to the same linked list.
+ */
+static inline void list_bulk_move_tail(struct list_head *head,
+ struct list_head *first,
+ struct list_head *last)
+{
+ first->prev->next = last->next;
+ last->next->prev = first->prev;
+
+ head->prev->next = first;
+ first->prev = head->prev;
+
+ last->next = head;
+ head->prev = last;
+}
+
/**
* list_is_last - tests whether @list is the last entry in list @head
* @list: the entry to test
--
2.14.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/2] drm/ttm: once more fix ttm_bo_bulk_move_lru_tail v2
2018-09-13 11:22 [PATCH 1/2] list: introduce list_bulk_move_tail helper Christian König
@ 2018-09-13 11:22 ` Christian König
2018-09-13 15:52 ` Mike Lothian
2018-09-14 2:53 ` Huang Rui
1 sibling, 1 reply; 5+ messages in thread
From: Christian König @ 2018-09-13 11:22 UTC (permalink / raw)
To: amd-gfx, dri-devel, linux-kernel
While cutting the lists we sometimes accidentally added a list_head from
the stack to the LRUs, effectively corrupting the list.
Remove the list cutting and use explicit list manipulation instead.
v2: separate out new list_bulk_move_tail helper
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/ttm/ttm_bo.c | 46 +++++++++++++++++++-------------------------
1 file changed, 20 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 138c98902033..26b889f86670 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -247,47 +247,38 @@ void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
}
EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
-static void ttm_bo_bulk_move_helper(struct ttm_lru_bulk_move_pos *pos,
- struct list_head *lru, bool is_swap)
-{
- struct list_head *list;
- LIST_HEAD(entries);
- LIST_HEAD(before);
-
- reservation_object_assert_held(pos->last->resv);
- list = is_swap ? &pos->last->swap : &pos->last->lru;
- list_cut_position(&entries, lru, list);
-
- reservation_object_assert_held(pos->first->resv);
- list = is_swap ? pos->first->swap.prev : pos->first->lru.prev;
- list_cut_position(&before, &entries, list);
-
- list_splice(&before, lru);
- list_splice_tail(&entries, lru);
-}
-
void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
{
unsigned i;
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
+ struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i];
struct ttm_mem_type_manager *man;
- if (!bulk->tt[i].first)
+ if (!pos->first)
continue;
- man = &bulk->tt[i].first->bdev->man[TTM_PL_TT];
- ttm_bo_bulk_move_helper(&bulk->tt[i], &man->lru[i], false);
+ reservation_object_assert_held(pos->first->resv);
+ reservation_object_assert_held(pos->last->resv);
+
+ man = &pos->first->bdev->man[TTM_PL_TT];
+ list_bulk_move_tail(&man->lru[i], &pos->first->lru,
+ &pos->last->lru);
}
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
+ struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i];
struct ttm_mem_type_manager *man;
- if (!bulk->vram[i].first)
+ if (!pos->first)
continue;
- man = &bulk->vram[i].first->bdev->man[TTM_PL_VRAM];
- ttm_bo_bulk_move_helper(&bulk->vram[i], &man->lru[i], false);
+ reservation_object_assert_held(pos->first->resv);
+ reservation_object_assert_held(pos->last->resv);
+
+ man = &pos->first->bdev->man[TTM_PL_VRAM];
+ list_bulk_move_tail(&man->lru[i], &pos->first->lru,
+ &pos->last->lru);
}
for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
@@ -297,8 +288,11 @@ void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
if (!pos->first)
continue;
+ reservation_object_assert_held(pos->first->resv);
+ reservation_object_assert_held(pos->last->resv);
+
lru = &pos->first->bdev->glob->swap_lru[i];
- ttm_bo_bulk_move_helper(&bulk->swap[i], lru, true);
+ list_bulk_move_tail(lru, &pos->first->swap, &pos->last->swap);
}
}
EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail);
--
2.14.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 2/2] drm/ttm: once more fix ttm_bo_bulk_move_lru_tail v2
2018-09-13 11:22 ` [PATCH 2/2] drm/ttm: once more fix ttm_bo_bulk_move_lru_tail v2 Christian König
@ 2018-09-13 15:52 ` Mike Lothian
0 siblings, 0 replies; 5+ messages in thread
From: Mike Lothian @ 2018-09-13 15:52 UTC (permalink / raw)
To: Christian König; +Cc: dri-devel, amd-gfx, linux-kernel
[-- Attachment #1.1: Type: text/plain, Size: 4377 bytes --]
Hi
This fixes a boot issue I had on Raven (
https://bugs.freedesktop.org/show_bug.cgi?id=107922)
Feel free to add to both patches:
Tested-by: Mike Lothian <mike@fireburn.co.uk>
Cheers
Mike
On Thu, 13 Sep 2018 at 12:22 Christian König <
ckoenig.leichtzumerken@gmail.com> wrote:
> While cutting the lists we sometimes accidentally added a list_head from
> the stack to the LRUs, effectively corrupting the list.
>
> Remove the list cutting and use explicit list manipulation instead.
>
> v2: separate out new list_bulk_move_tail helper
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
> drivers/gpu/drm/ttm/ttm_bo.c | 46
> +++++++++++++++++++-------------------------
> 1 file changed, 20 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 138c98902033..26b889f86670 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -247,47 +247,38 @@ void ttm_bo_move_to_lru_tail(struct
> ttm_buffer_object *bo,
> }
> EXPORT_SYMBOL(ttm_bo_move_to_lru_tail);
>
> -static void ttm_bo_bulk_move_helper(struct ttm_lru_bulk_move_pos *pos,
> - struct list_head *lru, bool is_swap)
> -{
> - struct list_head *list;
> - LIST_HEAD(entries);
> - LIST_HEAD(before);
> -
> - reservation_object_assert_held(pos->last->resv);
> - list = is_swap ? &pos->last->swap : &pos->last->lru;
> - list_cut_position(&entries, lru, list);
> -
> - reservation_object_assert_held(pos->first->resv);
> - list = is_swap ? pos->first->swap.prev : pos->first->lru.prev;
> - list_cut_position(&before, &entries, list);
> -
> - list_splice(&before, lru);
> - list_splice_tail(&entries, lru);
> -}
> -
> void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk)
> {
> unsigned i;
>
> for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
> + struct ttm_lru_bulk_move_pos *pos = &bulk->tt[i];
> struct ttm_mem_type_manager *man;
>
> - if (!bulk->tt[i].first)
> + if (!pos->first)
> continue;
>
> - man = &bulk->tt[i].first->bdev->man[TTM_PL_TT];
> - ttm_bo_bulk_move_helper(&bulk->tt[i], &man->lru[i], false);
> + reservation_object_assert_held(pos->first->resv);
> + reservation_object_assert_held(pos->last->resv);
> +
> + man = &pos->first->bdev->man[TTM_PL_TT];
> + list_bulk_move_tail(&man->lru[i], &pos->first->lru,
> + &pos->last->lru);
> }
>
> for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
> + struct ttm_lru_bulk_move_pos *pos = &bulk->vram[i];
> struct ttm_mem_type_manager *man;
>
> - if (!bulk->vram[i].first)
> + if (!pos->first)
> continue;
>
> - man = &bulk->vram[i].first->bdev->man[TTM_PL_VRAM];
> - ttm_bo_bulk_move_helper(&bulk->vram[i], &man->lru[i],
> false);
> + reservation_object_assert_held(pos->first->resv);
> + reservation_object_assert_held(pos->last->resv);
> +
> + man = &pos->first->bdev->man[TTM_PL_VRAM];
> + list_bulk_move_tail(&man->lru[i], &pos->first->lru,
> + &pos->last->lru);
> }
>
> for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
> @@ -297,8 +288,11 @@ void ttm_bo_bulk_move_lru_tail(struct
> ttm_lru_bulk_move *bulk)
> if (!pos->first)
> continue;
>
> + reservation_object_assert_held(pos->first->resv);
> + reservation_object_assert_held(pos->last->resv);
> +
> lru = &pos->first->bdev->glob->swap_lru[i];
> - ttm_bo_bulk_move_helper(&bulk->swap[i], lru, true);
> + list_bulk_move_tail(lru, &pos->first->swap,
> &pos->last->swap);
> }
> }
> EXPORT_SYMBOL(ttm_bo_bulk_move_lru_tail);
> --
> 2.14.1
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
[-- Attachment #1.2: Type: text/html, Size: 5979 bytes --]
[-- Attachment #2: Type: text/plain, Size: 160 bytes --]
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] list: introduce list_bulk_move_tail helper
2018-09-13 11:22 [PATCH 1/2] list: introduce list_bulk_move_tail helper Christian König
@ 2018-09-14 2:53 ` Huang Rui
2018-09-14 2:53 ` Huang Rui
1 sibling, 0 replies; 5+ messages in thread
From: Huang Rui @ 2018-09-14 2:53 UTC (permalink / raw)
To: Christian König; +Cc: amd-gfx, dri-devel, linux-kernel
On Thu, Sep 13, 2018 at 01:22:07PM +0200, Christian König wrote:
> Move all entries between @first and including @last before @head.
>
> This is useful for LRU lists where a whole block of entries should be
> moved to the end of an list.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
Bulk move helper is useful for TTM driver to improve the LRU moving
efficiency. Please go on with my RB.
Series are Reviewed-and-Tested-by: Huang Rui <ray.huang@amd.com>
> ---
> include/linux/list.h | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
>
> diff --git a/include/linux/list.h b/include/linux/list.h
> index de04cc5ed536..edb7628e46ed 100644
> --- a/include/linux/list.h
> +++ b/include/linux/list.h
> @@ -183,6 +183,29 @@ static inline void list_move_tail(struct list_head *list,
> list_add_tail(list, head);
> }
>
> +/**
> + * list_bulk_move_tail - move a subsection of a list to its tail
> + * @head: the head that will follow our entry
> + * @first: first entry to move
> + * @last: last entry to move, can be the same as first
> + *
> + * Move all entries between @first and including @last before @head.
> + * All three entries must belong to the same linked list.
> + */
> +static inline void list_bulk_move_tail(struct list_head *head,
> + struct list_head *first,
> + struct list_head *last)
> +{
> + first->prev->next = last->next;
> + last->next->prev = first->prev;
> +
> + head->prev->next = first;
> + first->prev = head->prev;
> +
> + last->next = head;
> + head->prev = last;
> +}
> +
> /**
> * list_is_last - tests whether @list is the last entry in list @head
> * @list: the entry to test
> --
> 2.14.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] list: introduce list_bulk_move_tail helper
@ 2018-09-14 2:53 ` Huang Rui
0 siblings, 0 replies; 5+ messages in thread
From: Huang Rui @ 2018-09-14 2:53 UTC (permalink / raw)
To: Christian König; +Cc: amd-gfx, dri-devel, linux-kernel
On Thu, Sep 13, 2018 at 01:22:07PM +0200, Christian König wrote:
> Move all entries between @first and including @last before @head.
>
> This is useful for LRU lists where a whole block of entries should be
> moved to the end of an list.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
Bulk move helper is useful for TTM driver to improve the LRU moving
efficiency. Please go on with my RB.
Series are Reviewed-and-Tested-by: Huang Rui <ray.huang@amd.com>
> ---
> include/linux/list.h | 23 +++++++++++++++++++++++
> 1 file changed, 23 insertions(+)
>
> diff --git a/include/linux/list.h b/include/linux/list.h
> index de04cc5ed536..edb7628e46ed 100644
> --- a/include/linux/list.h
> +++ b/include/linux/list.h
> @@ -183,6 +183,29 @@ static inline void list_move_tail(struct list_head *list,
> list_add_tail(list, head);
> }
>
> +/**
> + * list_bulk_move_tail - move a subsection of a list to its tail
> + * @head: the head that will follow our entry
> + * @first: first entry to move
> + * @last: last entry to move, can be the same as first
> + *
> + * Move all entries between @first and including @last before @head.
> + * All three entries must belong to the same linked list.
> + */
> +static inline void list_bulk_move_tail(struct list_head *head,
> + struct list_head *first,
> + struct list_head *last)
> +{
> + first->prev->next = last->next;
> + last->next->prev = first->prev;
> +
> + head->prev->next = first;
> + first->prev = head->prev;
> +
> + last->next = head;
> + head->prev = last;
> +}
> +
> /**
> * list_is_last - tests whether @list is the last entry in list @head
> * @list: the entry to test
> --
> 2.14.1
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
^ permalink raw reply [flat|nested] 5+ messages in thread
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-- links below jump to the message on this page --
2018-09-13 11:22 [PATCH 1/2] list: introduce list_bulk_move_tail helper Christian König
2018-09-13 11:22 ` [PATCH 2/2] drm/ttm: once more fix ttm_bo_bulk_move_lru_tail v2 Christian König
2018-09-13 15:52 ` Mike Lothian
2018-09-14 2:53 ` [PATCH 1/2] list: introduce list_bulk_move_tail helper Huang Rui
2018-09-14 2:53 ` Huang Rui
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