On 2024/9/10 19:27, Jesper Dangaard Brouer wrote:
...
>>
>> The main issue I remembered was that it only support x86:(
>>
>
> Yes, because I've added ASM code for reading TSC counter in a very
> precise manor. Given we run many iterations, then I don't think we
> need this precise reading. I gue
On 2024/9/10 1:28, Mina Almasry wrote:
> On Mon, Sep 9, 2024 at 2:25 AM Yunsheng Lin wrote:
>>
>> The testing is done by ensuring that the page allocated from
>> the page_pool instance is pushed into a ptr_ring instance in
>> a kthread/napi binded to a specified cpu, a
: Yunsheng Lin
---
tools/testing/selftests/net/Makefile | 3 +
.../testing/selftests/net/page_pool/Makefile | 18 +
.../selftests/net/page_pool/page_pool_test.c | 433 ++
tools/testing/selftests/net/test_page_pool.sh | 175 +++
4 files changed, 629 insertions
Add testing for the newly added prepare API, for both aligned
and non-aligned API, also probe API is also tested along with
prepare API.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
.../selftests/mm/page_frag/page_frag_test.c | 66 +--
tools/testing/selftests/mm
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
Reviewed-by: Alexander Duyck
Acked-by: Chuck Lever
---
drivers/vhost/net.c | 2 +-
include/linux/page_fr
1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowe...@redhat.com/
2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956...@gmail.com/
3.
https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=ym_aia4oomd-2wxyko42bizawmt_...@mail.gmail.com/
CC: David Howells
CC: Alexander Duyck
Signed-
-off-by: Yunsheng Lin
Reviewed-by: Alexander Duyck
---
tools/testing/selftests/mm/Makefile | 3 +
tools/testing/selftests/mm/page_frag/Makefile | 18 ++
.../selftests/mm/page_frag/page_frag_test.c | 170 +
tools/testing/selftests/mm/run_vmtests.sh | 8 +
tools
On 2024/8/6 8:52, Alexander Duyck wrote:
> On Sun, Aug 4, 2024 at 10:00 AM Yunsheng Lin
> wrote:
>>
>> On 8/3/2024 1:00 AM, Alexander Duyck wrote:
>>
>>>>
>>>>>
>>>>> As far as your API extension and naming maybe you should look
On 8/3/2024 1:00 AM, Alexander Duyck wrote:
As far as your API extension and naming maybe you should look like
something like bio_vec and borrow the naming from that since that is
essentially what you are passing back and forth is essentially that
instead of a page frag which is normally a vi
On 2024/8/1 23:21, Alexander Duyck wrote:
> On Thu, Aug 1, 2024 at 6:01 AM Yunsheng Lin wrote:
>>
>> On 2024/8/1 2:13, Alexander Duyck wrote:
>>> On Wed, Jul 31, 2024 at 5:50 AM Yunsheng Lin wrote:
>>>>
>>>> Currently the page_frag API is return
On 2024/8/1 2:13, Alexander Duyck wrote:
> On Wed, Jul 31, 2024 at 5:50 AM Yunsheng Lin wrote:
>>
>> Currently the page_frag API is returning 'virtual address'
>> or 'va' when allocing and expecting 'virtual address' or
>> 'va' as
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
Reviewed-by: Alexander Duyck
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
Reviewed-by: Subbaraya Sundeep
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_t
On 2024/7/22 4:41, Alexander Duyck wrote:
> On Fri, Jul 19, 2024 at 2:37 AM Yunsheng Lin wrote:
>>
>> Currently the page_frag API is returning 'virtual address'
>> or 'va' when allocing and expecting 'virtual address' or
>> 'va&#x
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
Reviewed-by: Subbaraya Sundeep
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_t
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
Use appropriate frag_page API instead of caller accessing
'page_frag_cache' directly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/vhost/net.c | 2 +-
include/linux/page_frag_cache.h | 10 ++
mm/page_frag_test.c | 2 +-
net/cor
h
va, page or both va and page may call page_frag_alloc_va*,
page_frag_alloc_pg*, or page_frag_alloc* API accordingly.
CC: Alexander Duyck
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drive
On 2024/4/17 0:12, Alexander H Duyck wrote:
> On Mon, 2024-04-15 at 21:19 +0800, Yunsheng Lin wrote:
>> Currently most of the API for page_frag API is returning
>> 'virtual address' as output or expecting 'virtual address'
>> as input, in order to different
ding API mirroring the page_pool_alloc_va() API of
the page_pool.
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drivers/net/ethernet/intel/ice/ice_txrx.h | 2 +-
drivers/net/ethernet/intel/
ding API mirroring the page_pool_alloc_va() API of
the page_pool.
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drivers/net/ethernet/intel/ice/ice_txrx.h | 2 +-
drivers/net/ethernet/intel/
ding API mirroring the page_pool_alloc_va() API of
the page_pool.
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_rx.c | 4 ++--
drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
drivers/net/ethernet/intel/ice/ice_txrx.h | 2 +-
drivers/net/ethernet/intel/
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng Lin
.
Steps for vhost_net rx testing:
1. Prepare a in buf.
2. Do the sending in the tun side.
3. Kick the vhost_net to do rx processing.
4. verify the data received by vhost_net is correct.
Signed-off-by: Yunsheng Lin
---
tools/virtio/.gitignore| 1 +
tools/virtio/Makefile
g for page frag implementation in sock.c
for now as suggested by Paolo Abeni.
Signed-off-by: Yunsheng Lin
Reviewed-by: Alexander Duyck
CC: Alexander Duyck
---
drivers/vhost/net.c | 2 +-
mm/page_alloc.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/net.c
On 2024/2/6 11:08, Jason Wang wrote:
...
>> +
>> +static void wait_for_interrupt(struct vq_info *vq)
>> +{
>> + unsigned long long val;
>> +
>> + poll(&vq->fds, 1, -1);
>
> It's not good to wait indefinitely.
How about a timeout value of 100ms as below?
poll(&vq->fds, 1, 100);
>
>
.
Steps for vhost_net rx testing:
1. Prepare a in buf.
2. Do the sending in the tun side.
3. Kick the vhost_net to do rx processing.
4. verify the data received by vhost_net is correct.
Signed-off-by: Yunsheng Lin
---
tools/virtio/.gitignore| 1 +
tools/virtio/Makefile
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng Lin
g for page frag implementation in sock.c
for now as suggested by Paolo Abeni.
Signed-off-by: Yunsheng Lin
Reviewed-by: Alexander Duyck
CC: Alexander Duyck
---
drivers/vhost/net.c | 2 +-
mm/page_alloc.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/net.c
On 2024/2/4 9:30, Jason Wang wrote:
> On Fri, Feb 2, 2024 at 8:24 PM Yunsheng Lin wrote:
>>
>> On 2024/2/2 12:05, Jason Wang wrote:
>>> On Tue, Jan 30, 2024 at 7:38 PM Yunsheng Lin wrote:
>>>>
>>>> introduce vhost_net_test basing on virtio_te
On 2024/2/2 16:36, Paolo Abeni wrote:
> On Fri, 2024-02-02 at 10:10 +0800, Yunsheng Lin wrote:
>> On 2024/2/1 21:16, Paolo Abeni wrote:
>>
>>> from the __page_frag_cache_refill() allocator - which never accesses
>>> the memory reserves.
>>
>> I am n
On 2024/2/2 12:05, Jason Wang wrote:
> On Tue, Jan 30, 2024 at 7:38 PM Yunsheng Lin wrote:
>>
>> introduce vhost_net_test basing on virtio_test to test
>> vhost_net changing in the kernel.
>
> Let's describe what kind of test is being done and how it is done here.
On 2024/2/1 21:16, Paolo Abeni wrote:
> On Tue, 2024-01-30 at 19:37 +0800, Yunsheng Lin wrote:
>> Currently there seems to be three page frag implementions
>> which all try to allocate order 3 page, if that fails, it
>> then fail back to allocate order 0 page, and each of them
introduce vhost_net_test basing on virtio_test to test
vhost_net changing in the kernel.
Signed-off-by: Yunsheng Lin
---
tools/virtio/.gitignore | 1 +
tools/virtio/Makefile | 8 +-
tools/virtio/vhost_net_test.c | 576 ++
3 files changed, 582
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng Lin
(), but it is not
masked off in __page_frag_cache_refill().
This patch unifies the gfp bits used between different
implementions by or'ing __GFP_NOMEMALLOC and masking off
__GFP_DIRECT_RECLAIM for order 3 page allocation to avoid
possible pressure for mm.
Signed-off-by: Yunsheng Lin
Reviewe
introduce vhost_net_test basing on virtio_test to test
vhost_net changing in the kernel.
Signed-off-by: Yunsheng Lin
---
tools/virtio/.gitignore | 1 +
tools/virtio/Makefile | 8 +-
tools/virtio/vhost_net_test.c | 576 ++
3 files changed, 582
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng Lin
(), but it is not
masked off in __page_frag_cache_refill().
This patch unifies the gfp bits used between different
implementions by or'ing __GFP_NOMEMALLOC and masking off
__GFP_DIRECT_RECLAIM for order 3 page allocation to avoid
possible pressure for mm.
Signed-off-by: Yunsheng Lin
Reviewe
On 2024/1/6 0:06, Alexander H Duyck wrote:
>>
>> static void handle_tx_copy(struct vhost_net *net, struct socket *sock)
>> @@ -1353,8 +1318,7 @@ static int vhost_net_open(struct inode *inode, struct
>> file *f)
>> vqs[VHOST_NET_VQ_RX]);
>>
>> f->private_data = n;
>>
On 2024/1/5 23:35, Alexander H Duyck wrote:
> On Wed, 2024-01-03 at 17:56 +0800, Yunsheng Lin wrote:
>> Currently there seems to be three page frag implementions
>> which all try to allocate order 3 page, if that fails, it
>> then fail back to allocate order 0 page, and each
On 2024/1/5 0:17, Eugenio Perez Martin wrote:
> On Wed, Jan 3, 2024 at 11:00 AM Yunsheng Lin wrote:
...
>> +
>> +static void run_tx_test(struct vdev_info *dev, struct vq_info *vq,
>> + bool delayed, int batch, int bufs)
>> +{
>> +
introduce vhost_net_test basing on virtio_test to test
vhost_net changing in the kernel.
Signed-off-by: Yunsheng Lin
---
tools/virtio/Makefile | 8 +-
tools/virtio/vhost_net_test.c | 574 ++
2 files changed, 579 insertions(+), 3 deletions(-)
create
When draining a page_frag_cache, most user are doing
the similar steps, so introduce an API to avoid code
duplication.
Signed-off-by: Yunsheng Lin
Acked-by: Jason Wang
---
drivers/net/ethernet/google/gve/gve_main.c | 11 ++-
drivers/net/ethernet/mediatek/mtk_wed_wo.c | 17
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng Lin
(), but it is not
masked off in __page_frag_cache_refill().
This patch unifies the gfp bits used between different
implementions by or'ing __GFP_NOMEMALLOC and masking off
__GFP_DIRECT_RECLAIM for order 3 page allocation to avoid
possible pressure for mm.
Signed-off-by: Yunsheng Lin
CC:
On 2023/12/21 10:33, Jason Wang wrote:
> On Wed, Dec 20, 2023 at 8:45 PM Yunsheng Lin wrote:
>>
>> On 2023/12/12 12:35, Jason Wang wrote:>>>> +done:
>>>>>> + backend.fd = tun_alloc();
>>>>>> + assert
On 2023/12/12 12:35, Jason Wang wrote: +done:
+ backend.fd = tun_alloc();
+ assert(backend.fd >= 0);
+ vdev_info_init(&dev, features);
+ vq_info_add(&dev, 256);
+ run_test(&dev, &dev.vqs[0], delayed, batch, reset, nbufs);
>>>
>>> I'd expect
On 2023/12/17 16:09, Mina Almasry wrote:
> Use netmem_t instead of page directly in skb_frag_t. Currently netmem_t
> is always a struct page underneath, but the abstraction allows efforts
> to add support for skb frags not backed by pages.
>
> There is unfortunately 1 instance where the skb_frag_t
On 2023/12/7 14:00, Jason Wang wrote:
> On Tue, Dec 5, 2023 at 7:35 PM Yunsheng Lin wrote:
...
>> +
>> +static int tun_alloc(void)
>> +{
>> + struct ifreq ifr;
>> + int fd, e;
>> +
>> + fd = open("/dev/net/tun", O_RD
On 2023/12/7 11:15, Jakub Kicinski wrote:
> On Tue, 5 Dec 2023 19:34:40 +0800 Yunsheng Lin wrote:
>> __GFP_DIRECT_RECLAIM is xor'd to avoid
>> direct reclaim in skb_page_frag_refill(), but it is not
>> xor'd in __page_frag_cache_refill().
>
> xor is not the
introduce vhost_net_test basing on virtio_test to test
vhost_net changing in the kernel.
Signed-off-by: Yunsheng Lin
---
tools/virtio/Makefile | 8 +-
tools/virtio/vhost_net_test.c | 441 ++
2 files changed, 446 insertions(+), 3 deletions(-)
create
When draining a page_frag_cache, most user are doing
the similar steps, so introduce an API to avoid code
duplication.
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_main.c | 11 ++-
drivers/net/ethernet/mediatek/mtk_wed_wo.c | 17 ++---
drivers/nvme
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng
, but it is not
xor'd in __page_frag_cache_refill().
This patch unifies the gfp bits used between different
implementions by or'ing __GFP_NOMEMALLOC and xor'ing
__GFP_DIRECT_RECLAIM for order 3 page allocation to avoid
possible pressure for mm.
Signed-off-by: Yunsheng Lin
CC: Alexa
When draining a page_frag_cache, most user are doing
the similar steps, so introduce an API to avoid code
duplication.
Signed-off-by: Yunsheng Lin
---
drivers/net/ethernet/google/gve/gve_main.c | 11 ++-
drivers/net/ethernet/mediatek/mtk_wed_wo.c | 17 ++---
drivers/nvme
introduce vhost_net_test basing on virtio_test to test
vhost_net changing in the kernel.
Signed-off-by: Yunsheng Lin
---
tools/virtio/Makefile | 8 +-
tools/virtio/vhost_net_test.c | 441 ++
2 files changed, 446 insertions(+), 3 deletions(-)
create
uct page_frag',
and allocating frag using page_frag_alloc_align().
The added benefit is that not only unifying the page frag
implementation a little, but also having about 0.5% performance
boost testing by using the vhost_net_test introduced in the
last patch.
Signed-off-by: Yunsheng
, but it is not
xor'd in __page_frag_cache_refill().
This patch unifies the gfp bits used between different
implementions by or'ing __GFP_NOMEMALLOC and xor'ing
__GFP_DIRECT_RECLAIM for order 3 page allocation to avoid
possible pressure for mm.
Signed-off-by: Yunsheng Lin
CC: Alexa
On 2021/4/20 7:55, Michal Kubecek wrote:
> On Mon, Apr 19, 2021 at 05:29:46PM +0200, Michal Kubecek wrote:
>>
>> As pointed out in the discussion on v3, this patch may result in
>> significantly higher CPU consumption with multiple threads competing on
>> a saturated outgoing device. I missed this
On 2021/4/19 22:57, Michal Kubecek wrote:
> On Mon, Apr 19, 2021 at 10:04:27AM +0800, Yunsheng Lin wrote:
>>>
>>> I tried this patch o top of 5.12-rc7 with real devices. I used two
>>> machines with 10Gb/s Intel ixgbe NICs, sender has 16 CPUs (2 8-core CPUs
>
On 2021/4/19 10:04, Yunsheng Lin wrote:
> On 2021/4/19 6:59, Michal Kubecek wrote:
>> On Thu, Mar 25, 2021 at 11:13:11AM +0800, Yunsheng Lin wrote:
>>> Lockless qdisc has below concurrent problem:
>>> cpu0 cpu1
>>> .
On 2021/4/19 6:59, Michal Kubecek wrote:
> On Thu, Mar 25, 2021 at 11:13:11AM +0800, Yunsheng Lin wrote:
>> Lockless qdisc has below concurrent problem:
>> cpu0 cpu1
>> .
On 2021/1/6 11:32, Dongseok Yi wrote:
> On 2021-01-06 12:07, Willem de Bruijn wrote:
>>
>> On Tue, Jan 5, 2021 at 8:29 PM Dongseok Yi wrote:
>>>
>>> On 2021-01-05 06:03, Willem de Bruijn wrote:
On Mon, Jan 4, 2021 at 4:00 AM Dongseok Yi wrote:
>
> skbs in frag_list could be shar
net: sched: allow qdiscs to handle locking")
Signed-off-by: Yunsheng Lin
Tested-by: Juergen Gross
---
V4: Change STATE_NEED_RESCHEDULE to STATE_MISSED mirroring
NAPI's NAPIF_STATE_MISSED, and add Juergen's "Tested-by"
tag for there is only renaming and typo fixing betw
the race without calling qdisc_run() at all, so
remove the STATE_DEACTIVATED checking in qdisc_run().
After qdisc_reset(), there is no skb in qdisc to be dequeued, so
clear the STATE_MISSED in dev_reset_queue() too.
Fixes: 6b3ba9146fe6 ("net: sched: allow qdiscs to handle locking")
S
]. https://lkml.org/lkml/2019/10/9/42
Yunsheng Lin (2):
net: sched: fix packet stuck problem for lockless qdisc
net: sched: fix endless tx action reschedule during deactivation
include/net/pkt_sched.h | 7 +--
include/net/sch_generic.h | 37 -
net/core
]. https://lkml.org/lkml/2019/10/9/42
Yunsheng Lin (2):
net: sched: fix packet stuck problem for lockless qdisc
net: sched: fix endless tx action reschedule during deactivation
include/net/pkt_sched.h | 7 +--
include/net/sch_generic.h | 37 -
net/core
On 2021/4/13 16:33, Hillf Danton wrote:
> On Tue, 13 Apr 2021 15:57:29 Yunsheng Lin wrote:
>> On 2021/4/13 15:12, Hillf Danton wrote:
>>> On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
>>>> On 2021/4/13 11:26, Hillf Danton wrote:
>>>>> On Tue, 13 Ap
On 2021/4/13 15:12, Hillf Danton wrote:
> On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
>> On 2021/4/13 11:26, Hillf Danton wrote:
>>> On Tue, 13 Apr 2021 10:56:42 Yunsheng Lin wrote:
>>>> On 2021/4/13 10:21, Hillf Danton wrote:
>>>>> On
On 2021/4/13 11:26, Hillf Danton wrote:
> On Tue, 13 Apr 2021 10:56:42 Yunsheng Lin wrote:
>> On 2021/4/13 10:21, Hillf Danton wrote:
>>> On Mon, 12 Apr 2021 20:00:43 Yunsheng Lin wrote:
>>>>
>>>> Yes, the below patch seems to fix the data race described
On 2021/4/13 10:21, Hillf Danton wrote:
> On Mon, 12 Apr 2021 20:00:43 Yunsheng Lin wrote:
>>
>> Yes, the below patch seems to fix the data race described in
>> the commit log.
>> Then what is the difference between my patch and your patch below:)
>
> Hehe, t
On 2021/4/12 15:28, Hillf Danton wrote:
> On Mon, 12 Apr 2021 11:37:24 Yunsheng Lin wrote:
>> On 2021/4/12 11:21, Hillf Danton wrote:
>>> On Mon, 12 Apr 2021 09:24:30 Yunsheng Lin wrote:
>>>> On 2021/4/9 17:09, Hillf Danton wrote:
>>>>> On Fri, 9 Apr
On 2021/4/12 11:21, Hillf Danton wrote:
> On Mon, 12 Apr 2021 09:24:30 Yunsheng Lin wrote:
>> On 2021/4/9 17:09, Hillf Danton wrote:
>>> On Fri, 9 Apr 2021 07:31:03 Juergen Gross wrote:
>>>> On 25.03.21 04:13, Yunsheng Lin wrote:
>>>> I have a setup
On 2021/4/9 17:09, Hillf Danton wrote:
> On Fri, 9 Apr 2021 07:31:03 Juergen Gross wrote:
>> On 25.03.21 04:13, Yunsheng Lin wrote:
>> I have a setup which is able to reproduce the issue quite reliably:
>>
>> In a Xen guest I'm mounting 8 NFS shares and run sysbenc
On 2021/4/9 13:31, Juergen Gross wrote:
> On 25.03.21 04:13, Yunsheng Lin wrote:
>> Lockless qdisc has below concurrent problem:
>> cpu0 cpu1
>> . .
>> q->enqueue .
>> .
On 2021/4/6 15:31, Michal Kubecek wrote:
> On Tue, Apr 06, 2021 at 10:46:29AM +0800, Yunsheng Lin wrote:
>> On 2021/4/6 9:49, Cong Wang wrote:
>>> On Sat, Apr 3, 2021 at 5:23 AM Jiri Kosina wrote:
>>>>
>>>> I am still planning to have Yunsheng Lin's
On 2021/4/6 18:13, Juergen Gross wrote:
> On 06.04.21 09:06, Michal Kubecek wrote:
>> On Tue, Apr 06, 2021 at 08:55:41AM +0800, Yunsheng Lin wrote:
>>>
>>> Hi, Jiri
>>> Do you have a reproducer that can be shared here?
>>> With reproducer, I can debu
On 2021/4/6 9:49, Cong Wang wrote:
> On Sat, Apr 3, 2021 at 5:23 AM Jiri Kosina wrote:
>>
>> I am still planning to have Yunsheng Lin's (CCing) fix [1] tested in the
>> coming days. If it works, then we can consider proceeding with it,
>> otherwise I am all for reverting the whole NOLOCK stuff.
>>
On 2021/4/3 20:23, Jiri Kosina wrote:
> On Sat, 3 Apr 2021, Hillf Danton wrote:
>
> Sure. Seems they crept in over time. I had some plans to write a
> lockless HTB implementation. But with fq+EDT with BPF it seems that
> it is no longer needed, we have a more generic/better solution.
qdiscs to handle locking")
Signed-off-by: Yunsheng Lin
---
V3: fix a compile error and a few comment typo, remove the
__QDISC_STATE_DEACTIVATED checking, and update the
performance data.
V2: Avoid the overhead of fixing the data race as much as
possible.
---
include/
On 2021/3/25 3:20, Cong Wang wrote:
> On Tue, Mar 23, 2021 at 7:24 PM Yunsheng Lin wrote:
>> @@ -176,8 +207,23 @@ static inline bool qdisc_run_begin(struct Qdisc *qdisc)
>> static inline void qdisc_run_end(struct Qdisc *qdisc)
>> {
>> write_seqcount_end(&
On 2021/3/24 9:49, Cong Wang wrote:
> On Sun, Mar 21, 2021 at 5:55 PM Yunsheng Lin wrote:
>>
>> On 2021/3/20 2:15, Cong Wang wrote:
>>> On Thu, Mar 18, 2021 at 12:33 AM Yunsheng Lin
>>> wrote:
>>>>
>>>> On 2021/3/17 21:45, Jason A.
qdiscs to handle locking")
Signed-off-by: Yunsheng Lin
---
V2: Avoid the overhead of fixing the data race as much as
possible.
---
include/net/sch_generic.h | 48 ++-
net/sched/sch_generic.c | 12
2 files changed, 59 insertions(+
On 2021/3/23 14:37, Ahmad Fatoum wrote:
> Hi,
>
> On 22.03.21 10:09, Yunsheng Lin wrote:
>> Currently pfifo_fast has both TCQ_F_CAN_BYPASS and TCQ_F_NOLOCK
>> flag set, but queue discipline by-pass does not work for lockless
>> qdisc because skb is always enqueued t
igned-off-by: Yunsheng Lin
---
Hi, Vladimir and Ahmad
Please give it a test to see if there is any out of order
packet for this patch, which has removed the priv->lock added in
RFC v2.
There is a data race as below:
CPU1 CPU2
qdisc
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