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@kishaningithub
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Linus does not accept Github PRs. :-P

@najsword
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h是嘛

laijs pushed a commit to laijs/linux that referenced this pull request Feb 13, 2017
lkl: fix print functions to use lkl_ prefixed ones
fengguang pushed a commit to 0day-ci/linux that referenced this pull request Jun 1, 2017
split __bpf_prog_run() interpreter into stack allocation and execution parts.
The code section shrinks which helps interpreter performance in some cases.
   text	   data	    bss	    dec	    hex	filename
  26350	  10328	    624	  37302	   91b6	kernel/bpf/core.o.before
  25777	  10328	    624	  36729	   8f79	kernel/bpf/core.o.after

Very short programs got slower (due to extra function call):
Before:
test_bpf: torvalds#89 ALU64_ADD_K: 1 + 2 = 3 jited:0 7 PASS
test_bpf: torvalds#90 ALU64_ADD_K: 3 + 0 = 3 jited:0 8 PASS
test_bpf: torvalds#91 ALU64_ADD_K: 1 + 2147483646 = 2147483647 jited:0 7 PASS
test_bpf: torvalds#92 ALU64_ADD_K: 4294967294 + 2 = 4294967296 jited:0 11 PASS
test_bpf: torvalds#93 ALU64_ADD_K: 2147483646 + -2147483647 = -1 jited:0 7 PASS
After:
test_bpf: torvalds#89 ALU64_ADD_K: 1 + 2 = 3 jited:0 11 PASS
test_bpf: torvalds#90 ALU64_ADD_K: 3 + 0 = 3 jited:0 11 PASS
test_bpf: torvalds#91 ALU64_ADD_K: 1 + 2147483646 = 2147483647 jited:0 11 PASS
test_bpf: torvalds#92 ALU64_ADD_K: 4294967294 + 2 = 4294967296 jited:0 14 PASS
test_bpf: torvalds#93 ALU64_ADD_K: 2147483646 + -2147483647 = -1 jited:0 10 PASS

Longer programs got faster:
Before:
test_bpf: torvalds#266 BPF_MAXINSNS: Ctx heavy transformations jited:0 20286 20513 PASS
test_bpf: torvalds#267 BPF_MAXINSNS: Call heavy transformations jited:0 31853 31768 PASS
test_bpf: torvalds#268 BPF_MAXINSNS: Jump heavy test jited:0 9815 PASS
test_bpf: torvalds#269 BPF_MAXINSNS: Very long jump backwards jited:0 6 PASS
test_bpf: torvalds#270 BPF_MAXINSNS: Edge hopping nuthouse jited:0 13959 PASS
test_bpf: torvalds#271 BPF_MAXINSNS: Jump, gap, jump, ... jited:0 210 PASS
test_bpf: torvalds#272 BPF_MAXINSNS: ld_abs+get_processor_id jited:0 21724 PASS
test_bpf: torvalds#273 BPF_MAXINSNS: ld_abs+vlan_push/pop jited:0 19118 PASS
After:
test_bpf: torvalds#266 BPF_MAXINSNS: Ctx heavy transformations jited:0 19008 18827 PASS
test_bpf: torvalds#267 BPF_MAXINSNS: Call heavy transformations jited:0 29238 28450 PASS
test_bpf: torvalds#268 BPF_MAXINSNS: Jump heavy test jited:0 9485 PASS
test_bpf: torvalds#269 BPF_MAXINSNS: Very long jump backwards jited:0 12 PASS
test_bpf: torvalds#270 BPF_MAXINSNS: Edge hopping nuthouse jited:0 13257 PASS
test_bpf: torvalds#271 BPF_MAXINSNS: Jump, gap, jump, ... jited:0 213 PASS
test_bpf: torvalds#272 BPF_MAXINSNS: ld_abs+get_processor_id jited:0 19389 PASS
test_bpf: torvalds#273 BPF_MAXINSNS: ld_abs+vlan_push/pop jited:0 19583 PASS

For real world production programs the difference is noise.

This patch is first step towards reducing interpreter stack consumption.

Signed-off-by: Alexei Starovoitov <[email protected]>
Acked-by: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Oct 6, 2023
Add a new test case which performs double query of the bpf_mprog through
libbpf API, but also via raw bpf(2) syscall. This is testing to gather
first the count and then in a subsequent probe the full information with
the program array without clearing passed structs in between.

  # ./vmtest.sh -- ./test_progs -t tc_opts
  [...]
  ./test_progs -t tc_opts
  [    1.398818] tsc: Refined TSC clocksource calibration: 3407.999 MHz
  [    1.400263] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fd336761, max_idle_ns: 440795243819 ns
  [    1.402734] clocksource: Switched to clocksource tsc
  [    1.426639] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.428112] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK            <--- (new test)
  torvalds#269     tc_opts_replace:OK
  torvalds#270     tc_opts_revision:OK
  Summary: 19/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Oct 6, 2023
Add a new test case to query on an empty bpf_mprog and pass the revision
directly into expected_revision for attachment to assert that this does
succeed.

  ./test_progs -t tc_opts
  [    1.406778] tsc: Refined TSC clocksource calibration: 3407.990 MHz
  [    1.408863] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcaf6eb0, max_idle_ns: 440795321766 ns
  [    1.412419] clocksource: Switched to clocksource tsc
  [    1.428671] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.430260] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK
  torvalds#269     tc_opts_query_attach:OK     <--- (new test)
  torvalds#270     tc_opts_replace:OK
  torvalds#271     tc_opts_revision:OK
  Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Oct 7, 2023
Add a new test case which performs double query of the bpf_mprog through
libbpf API, but also via raw bpf(2) syscall. This is testing to gather
first the count and then in a subsequent probe the full information with
the program array without clearing passed structs in between.

  # ./vmtest.sh -- ./test_progs -t tc_opts
  [...]
  ./test_progs -t tc_opts
  [    1.398818] tsc: Refined TSC clocksource calibration: 3407.999 MHz
  [    1.400263] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fd336761, max_idle_ns: 440795243819 ns
  [    1.402734] clocksource: Switched to clocksource tsc
  [    1.426639] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.428112] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK            <--- (new test)
  torvalds#269     tc_opts_replace:OK
  torvalds#270     tc_opts_revision:OK
  Summary: 19/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Oct 7, 2023
Add a new test case to query on an empty bpf_mprog and pass the revision
directly into expected_revision for attachment to assert that this does
succeed.

  ./test_progs -t tc_opts
  [    1.406778] tsc: Refined TSC clocksource calibration: 3407.990 MHz
  [    1.408863] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcaf6eb0, max_idle_ns: 440795321766 ns
  [    1.412419] clocksource: Switched to clocksource tsc
  [    1.428671] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.430260] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK
  torvalds#269     tc_opts_query_attach:OK     <--- (new test)
  torvalds#270     tc_opts_replace:OK
  torvalds#271     tc_opts_revision:OK
  Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>
intel-lab-lkp pushed a commit to intel-lab-lkp/linux that referenced this pull request Oct 17, 2023
Add several new test cases which assert corner cases on the mprog query
mechanism, for example, around passing in a too small or a larger array
than the current count.

  ./test_progs -t tc_opts
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK
  torvalds#269     tc_opts_query_attach:OK
  torvalds#270     tc_opts_replace:OK
  torvalds#271     tc_opts_revision:OK
  Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Reviewed-by: Alan Maguire <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
RadxaStephen pushed a commit to RadxaStephen/linux that referenced this pull request Mar 6, 2024
@torvalds torvalds closed this Sep 22, 2025
bsbernd pushed a commit to DDNStorage/linux that referenced this pull request Nov 7, 2025
jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-427.18.1.el9_4
commit-author Daniel Borkmann <[email protected]>
commit d1a783d

Add various tests to check maximum number of supported programs
being attached:

  # ./vmtest.sh -- ./test_progs -t tc_opts
  [...]
  ./test_progs -t tc_opts
  [    1.185325] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.186826] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  [    1.270123] tsc: Refined TSC clocksource calibration: 3407.988 MHz
  [    1.272428] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fc932722, max_idle_ns: 440795381586 ns
  [    1.276408] clocksource: Switched to clocksource tsc
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK              <--- (new test)
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_replace:OK
  torvalds#269     tc_opts_revision:OK
  Summary: 18/0 PASSED, 0 SKIPPED, 0 FAILED

	Signed-off-by: Daniel Borkmann <[email protected]>
	Signed-off-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
(cherry picked from commit d1a783d)
	Signed-off-by: Jonathan Maple <[email protected]>
bsbernd pushed a commit to DDNStorage/linux that referenced this pull request Nov 7, 2025
jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-427.18.1.el9_4
commit-author Daniel Borkmann <[email protected]>
commit f9b0879

Add a new test case which performs double query of the bpf_mprog through
libbpf API, but also via raw bpf(2) syscall. This is testing to gather
first the count and then in a subsequent probe the full information with
the program array without clearing passed structs in between.

  # ./vmtest.sh -- ./test_progs -t tc_opts
  [...]
  ./test_progs -t tc_opts
  [    1.398818] tsc: Refined TSC clocksource calibration: 3407.999 MHz
  [    1.400263] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fd336761, max_idle_ns: 440795243819 ns
  [    1.402734] clocksource: Switched to clocksource tsc
  [    1.426639] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.428112] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK            <--- (new test)
  torvalds#269     tc_opts_replace:OK
  torvalds#270     tc_opts_revision:OK
  Summary: 19/0 PASSED, 0 SKIPPED, 0 FAILED

	Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
	Signed-off-by: Martin KaFai Lau <[email protected]>
(cherry picked from commit f9b0879)
	Signed-off-by: Jonathan Maple <[email protected]>
bsbernd pushed a commit to DDNStorage/linux that referenced this pull request Nov 7, 2025
jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-427.18.1.el9_4
commit-author Daniel Borkmann <[email protected]>
commit 685446b

Add a new test case to query on an empty bpf_mprog and pass the revision
directly into expected_revision for attachment to assert that this does
succeed.

  ./test_progs -t tc_opts
  [    1.406778] tsc: Refined TSC clocksource calibration: 3407.990 MHz
  [    1.408863] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x311fcaf6eb0, max_idle_ns: 440795321766 ns
  [    1.412419] clocksource: Switched to clocksource tsc
  [    1.428671] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.430260] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK
  torvalds#269     tc_opts_query_attach:OK     <--- (new test)
  torvalds#270     tc_opts_replace:OK
  torvalds#271     tc_opts_revision:OK
  Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED

	Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
	Signed-off-by: Martin KaFai Lau <[email protected]>
(cherry picked from commit 685446b)
	Signed-off-by: Jonathan Maple <[email protected]>
bsbernd pushed a commit to DDNStorage/linux that referenced this pull request Nov 7, 2025
jira LE-1907
Rebuild_History Non-Buildable kernel-5.14.0-427.18.1.el9_4
commit-author Daniel Borkmann <[email protected]>
commit 2451630

Add several new test cases which assert corner cases on the mprog query
mechanism, for example, around passing in a too small or a larger array
than the current count.

  ./test_progs -t tc_opts
  torvalds#252     tc_opts_after:OK
  torvalds#253     tc_opts_append:OK
  torvalds#254     tc_opts_basic:OK
  torvalds#255     tc_opts_before:OK
  torvalds#256     tc_opts_chain_classic:OK
  torvalds#257     tc_opts_chain_mixed:OK
  torvalds#258     tc_opts_delete_empty:OK
  torvalds#259     tc_opts_demixed:OK
  torvalds#260     tc_opts_detach:OK
  torvalds#261     tc_opts_detach_after:OK
  torvalds#262     tc_opts_detach_before:OK
  torvalds#263     tc_opts_dev_cleanup:OK
  torvalds#264     tc_opts_invalid:OK
  torvalds#265     tc_opts_max:OK
  torvalds#266     tc_opts_mixed:OK
  torvalds#267     tc_opts_prepend:OK
  torvalds#268     tc_opts_query:OK
  torvalds#269     tc_opts_query_attach:OK
  torvalds#270     tc_opts_replace:OK
  torvalds#271     tc_opts_revision:OK
  Summary: 20/0 PASSED, 0 SKIPPED, 0 FAILED

	Signed-off-by: Daniel Borkmann <[email protected]>
	Signed-off-by: Andrii Nakryiko <[email protected]>
	Reviewed-by: Alan Maguire <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
(cherry picked from commit 2451630)
	Signed-off-by: Jonathan Maple <[email protected]>
cynthia0928 pushed a commit to andestech/linux that referenced this pull request Dec 1, 2025
The default setting is V0 memory mapping, and the MAP bit in the
Configuration Register determines whether it is V1 memory mapping.

If the MAP bit is 1, then V1 memory mapping is used; otherwise, V0
memory mapping is used.

Signed-off-by: Locus Wei-Han Chen <[email protected]>
Reviewed-on: https://gitea.andestech.com/RD-SW/linux/pulls/269
Reviewed-by: Leo Yu-Chi Liang <[email protected]>
Reviewed-by: Tim Shih-Ting OuYang <[email protected]>
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6 participants