* [PATCH bpf-next v2] bpf: update bpf_get_smp_processor_id() documentation
@ 2021-09-14 23:54 Matteo Croce
2021-09-15 0:07 ` Yonghong Song
0 siblings, 1 reply; 3+ messages in thread
From: Matteo Croce @ 2021-09-14 23:54 UTC (permalink / raw)
To: bpf
Cc: linux-kernel, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Yonghong Song
From: Matteo Croce <mcroce@microsoft.com>
BPF programs run with migration disabled regardless of preemption, as
they are protected by migrate_disable().
Update the documentation accordingly.
Signed-off-by: Matteo Croce <mcroce@microsoft.com>
---
include/uapi/linux/bpf.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index d21326558d42..3e9785f1064a 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -1629,7 +1629,7 @@ union bpf_attr {
* u32 bpf_get_smp_processor_id(void)
* Description
* Get the SMP (symmetric multiprocessing) processor id. Note that
- * all programs run with preemption disabled, which means that the
+ * all programs run with migration disabled, which means that the
* SMP processor id is stable during all the execution of the
* program.
* Return
--
2.31.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH bpf-next v2] bpf: update bpf_get_smp_processor_id() documentation
2021-09-14 23:54 [PATCH bpf-next v2] bpf: update bpf_get_smp_processor_id() documentation Matteo Croce
@ 2021-09-15 0:07 ` Yonghong Song
2021-09-15 20:43 ` Daniel Borkmann
0 siblings, 1 reply; 3+ messages in thread
From: Yonghong Song @ 2021-09-15 0:07 UTC (permalink / raw)
To: Matteo Croce, bpf
Cc: linux-kernel, Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko
On 9/14/21 4:54 PM, Matteo Croce wrote:
> From: Matteo Croce <mcroce@microsoft.com>
>
> BPF programs run with migration disabled regardless of preemption, as
> they are protected by migrate_disable().
> Update the documentation accordingly.
>
> Signed-off-by: Matteo Croce <mcroce@microsoft.com>
Acked-by: Yonghong Song <yhs@fb.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH bpf-next v2] bpf: update bpf_get_smp_processor_id() documentation
2021-09-15 0:07 ` Yonghong Song
@ 2021-09-15 20:43 ` Daniel Borkmann
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Borkmann @ 2021-09-15 20:43 UTC (permalink / raw)
To: Yonghong Song, Matteo Croce, bpf
Cc: linux-kernel, Alexei Starovoitov, Andrii Nakryiko
On 9/15/21 2:07 AM, Yonghong Song wrote:
> On 9/14/21 4:54 PM, Matteo Croce wrote:
>> From: Matteo Croce <mcroce@microsoft.com>
>>
>> BPF programs run with migration disabled regardless of preemption, as
>> they are protected by migrate_disable().
>> Update the documentation accordingly.
>>
>> Signed-off-by: Matteo Croce <mcroce@microsoft.com>
>
> Acked-by: Yonghong Song <yhs@fb.com>
Applied, thanks & also copied this over to the tools/include/uapi/linux/bpf.h .
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-09-14 23:54 [PATCH bpf-next v2] bpf: update bpf_get_smp_processor_id() documentation Matteo Croce
2021-09-15 0:07 ` Yonghong Song
2021-09-15 20:43 ` Daniel Borkmann
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