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scheduler: new callback to initiate optimisations #344

Open
Tracked by #350
matttbe opened this issue Feb 1, 2023 · 2 comments
Open
Tracked by #350

scheduler: new callback to initiate optimisations #344

matttbe opened this issue Feb 1, 2023 · 2 comments
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enhancement sched packets scheduler

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@matttbe
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matttbe commented Feb 1, 2023

Currently, the packet scheduler is only invoked before queuing data and to select the next subflow.

If a packet scheduler wants to do some optimisations ("penalisation", "opportunistic retransmissions", mark subflows as "stale", force probing a subflow, etc.), it will need to react quicker and at different moment: e.g. when MPTCP and TCP congestion windows are being updated, typically when ACK are received, and RTO are fired.

It is important not to limit to MPTCP level events but to TCP level events: e.g. when a TCP ACK is received (at subflow level): RTT has maybe changed, maybe the subflow is no longer "stale". This is probably linked to #343.
@matttbe matttbe added enhancement sched packets scheduler labels Feb 1, 2023
This was referenced Feb 1, 2023
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@matttbe matttbe moved this to Needs triage in MPTCP Upstream: Future Feb 22, 2023
@sferlin
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sferlin commented May 2, 2023 •
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When would you add such a callback? As we are talking about updates on the TCP level that happen at least 1x/RTT, by the time, you have RTT measurements on the MPTCP level and you could perform "optimisations" on sub-RTT level. Assuming that the multipath scheduler would operate with some knowledge about the RTT of the subflows, you could have such callbacks operating with this granularity.

Potential corner case:
If you want to set a subflow to "stale" and there is data inflight. In MPTCP, (afaicr) you can ack data from different subflows i.e. not only the subflow that has sent the data. This might or might not be a problem, which needs some investigation.

@matttbe
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matttbe commented Jun 2, 2023

Hi @sferlin,

For the moment, a new packet scheduler will only be invoked before queuing data and to select the next subflow. That's not enough to take decisions like optimisations, etc. It should be called more often: not regularly (a new scheduler can do that without the help from the core) but in case of events like RTO, subflow events, etc. From there, the scheduler can also record the time since the last optimisation and decide not to do anything, e.g. to do something at a rate of max 1 RTT.

(I'm not sure I'm replying to your question, don't hesitate if I don't)

geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 12, 2024
@geliangtang
mptcp: add data_init interface for scheduler
b187a5e 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 13, 2024
@geliangtang
mptcp: add data_init interface for scheduler
32dce72 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 13, 2024
@geliangtang
mptcp: add data_init interface for scheduler
c0b00ed 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 13, 2024
@geliangtang
mptcp: add data_init interface for scheduler
eb5ed91 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 15, 2024
@geliangtang
mptcp: add data_init interface for scheduler
694d7ed 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 16, 2024
@geliangtang
mptcp: add data_init interface for scheduler
b335c9b 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 16, 2024
@geliangtang
mptcp: add data_init interface for scheduler
fa437c6 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 16, 2024
@geliangtang
mptcp: add data_init interface for scheduler
edd2cc7 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 16, 2024
@geliangtang
mptcp: add data_init interface for scheduler
cf23d6f 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 16, 2024
@geliangtang
mptcp: add data_init interface for scheduler
be125ef 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 19, 2024
@geliangtang
mptcp: add data_init interface for scheduler
5ac1492 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 20, 2024
@geliangtang
mptcp: add data_init interface for scheduler
21fc4c7 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 20, 2024
@geliangtang
mptcp: add data_init interface for scheduler
b43fa05 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 21, 2024
@geliangtang
mptcp: add data_init interface for scheduler
8702cf5 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 21, 2024
@geliangtang
mptcp: add data_init interface for scheduler
3f541f2 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 22, 2024
@geliangtang
mptcp: add data_init interface for scheduler
e8ac192 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 22, 2024
@geliangtang
mptcp: add data_init interface for scheduler
e9c2bd8 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 22, 2024
@geliangtang
mptcp: add data_init interface for scheduler
147c36e 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 22, 2024
@geliangtang
mptcp: add data_init interface for scheduler
446edb8 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 23, 2024
@geliangtang
mptcp: add data_init interface for scheduler
9cec8ee 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Mar 24, 2024
@geliangtang
mptcp: add data_init interface for scheduler
67b0920 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 7, 2024
@geliangtang
mptcp: add data_init interface for scheduler
a941af9 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 7, 2024
@geliangtang
mptcp: add data_init interface for scheduler
b134187 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 7, 2024
@geliangtang
mptcp: add data_init interface for scheduler
69ae898 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 7, 2024
@geliangtang
mptcp: add data_init interface for scheduler
08d5d6b 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 10, 2024
@geliangtang
mptcp: add data_init interface for scheduler
17c7ab9 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 10, 2024
@geliangtang
mptcp: add data_init interface for scheduler
c1cde55 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 11, 2024
@geliangtang
mptcp: add data_init interface for scheduler
f916486 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 11, 2024
@geliangtang
mptcp: add data_init interface for scheduler
27f9d19 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 12, 2024
@geliangtang
mptcp: add data_init interface for scheduler
3b634a1 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 13, 2024
@geliangtang
mptcp: add data_init interface for scheduler
63eee6b 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 13, 2024
@geliangtang
mptcp: add data_init interface for scheduler
f08903e 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 14, 2024
@geliangtang
mptcp: add data_init interface for scheduler
d34e019 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 15, 2024
@geliangtang
mptcp: add data_init interface for scheduler
6b2449a 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 15, 2024
@geliangtang
mptcp: add data_init interface for scheduler
c6c5714 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 18, 2024
@geliangtang
mptcp: add data_init interface for scheduler
899b706 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
matttbe pushed a commit that referenced this issue May 20, 2024
@chleroy @mpe
powerpc/bpf/32: Fix failing test_bpf tests
8ecf3c1 
Recent additions in BPF like cpu v4 instructions, test_bpf module
exhibits the following failures:

  test_bpf: #82 ALU_MOVSX | BPF_B jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)
  test_bpf: #83 ALU_MOVSX | BPF_H jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)
  test_bpf: #84 ALU64_MOVSX | BPF_B jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)
  test_bpf: #85 ALU64_MOVSX | BPF_H jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)
  test_bpf: #86 ALU64_MOVSX | BPF_W jited:1 ret 2 != 1 (0x2 != 0x1)FAIL (1 times)

  test_bpf: #165 ALU_SDIV_X: -6 / 2 = -3 jited:1 ret 2147483645 != -3 (0x7ffffffd != 0xfffffffd)FAIL (1 times)
  test_bpf: #166 ALU_SDIV_K: -6 / 2 = -3 jited:1 ret 2147483645 != -3 (0x7ffffffd != 0xfffffffd)FAIL (1 times)

  test_bpf: #169 ALU_SMOD_X: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times)
  test_bpf: #170 ALU_SMOD_K: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times)

  test_bpf: #172 ALU64_SMOD_K: -7 % 2 = -1 jited:1 ret 1 != -1 (0x1 != 0xffffffff)FAIL (1 times)

  test_bpf: #313 BSWAP 16: 0x0123456789abcdef -> 0xefcd
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 301 PASS
  test_bpf: #314 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 555 PASS
  test_bpf: #315 BSWAP 64: 0x0123456789abcdef -> 0x67452301
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 268 PASS
  test_bpf: #316 BSWAP 64: 0x0123456789abcdef >> 32 -> 0xefcdab89
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 269 PASS
  test_bpf: #317 BSWAP 16: 0xfedcba9876543210 -> 0x1032
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 460 PASS
  test_bpf: #318 BSWAP 32: 0xfedcba9876543210 -> 0x10325476
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 320 PASS
  test_bpf: #319 BSWAP 64: 0xfedcba9876543210 -> 0x98badcfe
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 222 PASS
  test_bpf: #320 BSWAP 64: 0xfedcba9876543210 >> 32 -> 0x10325476
  eBPF filter opcode 00d7 (@2) unsupported
  jited:0 273 PASS

  test_bpf: #344 BPF_LDX_MEMSX | BPF_B
  eBPF filter opcode 0091 (@5) unsupported
  jited:0 432 PASS
  test_bpf: #345 BPF_LDX_MEMSX | BPF_H
  eBPF filter opcode 0089 (@5) unsupported
  jited:0 381 PASS
  test_bpf: #346 BPF_LDX_MEMSX | BPF_W
  eBPF filter opcode 0081 (@5) unsupported
  jited:0 505 PASS

  test_bpf: #490 JMP32_JA: Unconditional jump: if (true) return 1
  eBPF filter opcode 0006 (@1) unsupported
  jited:0 261 PASS

  test_bpf: Summary: 1040 PASSED, 10 FAILED, [924/1038 JIT'ed]

Fix them by adding missing processing.

Fixes: daabb2b ("bpf/tests: add tests for cpuv4 instructions")
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://msgid.link/91de862dda99d170697eb79ffb478678af7e0b27.1709652689.git.christophe.leroy@csgroup.eu
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 22, 2024
@geliangtang
mptcp: add data_init interface for scheduler
00bdd83 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 23, 2024
@geliangtang
mptcp: add data_init interface for scheduler
59998f6 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 23, 2024
@geliangtang
mptcp: add data_init interface for scheduler
5e9ed81 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 24, 2024
@geliangtang
mptcp: add data_init interface for scheduler
6a7320c 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 27, 2024
@geliangtang
mptcp: add data_init interface for scheduler
155ed38 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 29, 2024
@geliangtang
mptcp: add data_init interface for scheduler
168984c 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 29, 2024
@geliangtang
mptcp: add data_init interface for scheduler
534522f 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 29, 2024
@geliangtang
mptcp: add data_init interface for scheduler
a53343d 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 29, 2024
@geliangtang
mptcp: add data_init interface for scheduler
bde4680 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 30, 2024
@geliangtang
mptcp: add data_init interface for scheduler
fd817ad 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 30, 2024
@geliangtang
mptcp: add data_init interface for scheduler
f5c0a4a 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue May 31, 2024
@geliangtang
mptcp: add data_init interface for scheduler
7482639 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
geliangtang added a commit to geliangtang/mptcp_net-next that referenced this issue Jun 4, 2024
@geliangtang
mptcp: add data_init interface for scheduler
6f7b936 
This patch adds a new interface data_init() for struct mptcp_sched_ops.
It's a new callback to initiate optimisations.

Closes: multipath-tcp#344
Signed-off-by: Geliang Tang <[email protected]>
matttbe pushed a commit that referenced this issue Jul 10, 2024
@borkmann
selftests/bpf: Extend tcx tests to cover late tcx_entry release
5f1d18d 
Add a test case which replaces an active ingress qdisc while keeping the
miniq in-tact during the transition period to the new clsact qdisc.

  # ./vmtest.sh -- ./test_progs -t tc_link
  [...]
  ./test_progs -t tc_link
  [    3.412871] bpf_testmod: loading out-of-tree module taints kernel.
  [    3.413343] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  #332     tc_links_after:OK
  #333     tc_links_append:OK
  #334     tc_links_basic:OK
  #335     tc_links_before:OK
  #336     tc_links_chain_classic:OK
  #337     tc_links_chain_mixed:OK
  #338     tc_links_dev_chain0:OK
  #339     tc_links_dev_cleanup:OK
  #340     tc_links_dev_mixed:OK
  #341     tc_links_ingress:OK
  #342     tc_links_invalid:OK
  #343     tc_links_prepend:OK
  #344     tc_links_replace:OK
  #345     tc_links_revision:OK
  Summary: 14/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Cc: Martin KaFai Lau <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>
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enhancement sched packets scheduler
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