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Lineage misc fixes #46
Merged
derfelot
merged 7 commits into
whatawurst:lineage-18.1
from
Flamefire:lineage-misc-fixes
Sep 14, 2021
Merged
Lineage misc fixes #46
derfelot
merged 7 commits into
whatawurst:lineage-18.1
from
Flamefire:lineage-misc-fixes
Sep 14, 2021
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top(1) opens the following files for every PID: /proc/*/stat /proc/*/statm /proc/*/status This patch switches /proc/*/status away from seq_printf(). The result is 13.5% speedup. Benchmark is open("/proc/self/status")+read+close 1.000.000 million times. BEFORE $ perf stat -r 10 taskset -c 3 ./proc-self-status Performance counter stats for 'taskset -c 3 ./proc-self-status' (10 runs): 10748.474301 task-clock (msec) # 0.954 CPUs utilized ( +- 0.91% ) 12 context-switches # 0.001 K/sec ( +- 1.09% ) 1 cpu-migrations # 0.000 K/sec 104 page-faults # 0.010 K/sec ( +- 0.45% ) 37,424,127,876 cycles # 3.482 GHz ( +- 0.04% ) 8,453,010,029 stalled-cycles-frontend # 22.59% frontend cycles idle ( +- 0.12% ) 3,747,609,427 stalled-cycles-backend # 10.01% backend cycles idle ( +- 0.68% ) 65,632,764,147 instructions # 1.75 insn per cycle # 0.13 stalled cycles per insn ( +- 0.00% ) 13,981,324,775 branches # 1300.773 M/sec ( +- 0.00% ) 138,967,110 branch-misses # 0.99% of all branches ( +- 0.18% ) 11.263885428 seconds time elapsed ( +- 0.04% ) ^^^^^^^^^^^^ AFTER $ perf stat -r 10 taskset -c 3 ./proc-self-status Performance counter stats for 'taskset -c 3 ./proc-self-status' (10 runs): 9010.521776 task-clock (msec) # 0.925 CPUs utilized ( +- 1.54% ) 11 context-switches # 0.001 K/sec ( +- 1.54% ) 1 cpu-migrations # 0.000 K/sec ( +- 11.11% ) 103 page-faults # 0.011 K/sec ( +- 0.60% ) 32,352,310,603 cycles # 3.591 GHz ( +- 0.07% ) 7,849,199,578 stalled-cycles-frontend # 24.26% frontend cycles idle ( +- 0.27% ) 3,269,738,842 stalled-cycles-backend # 10.11% backend cycles idle ( +- 0.73% ) 56,012,163,567 instructions # 1.73 insn per cycle # 0.14 stalled cycles per insn ( +- 0.00% ) 11,735,778,795 branches # 1302.453 M/sec ( +- 0.00% ) 98,084,459 branch-misses # 0.84% of all branches ( +- 0.28% ) 9.741247736 seconds time elapsed ( +- 0.07% ) ^^^^^^^^^^^ Link: http://lkml.kernel.org/r/20160806125608.GB1187@p183.telecom.by Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Change-Id: I97f5017503ec1ed13bc635fbd96506b13b98e36f
Allow some seq_puts removals by taking a string instead of a single char. [akpm@linux-foundation.org: update vmstat_show(), per Joe] Link: http://lkml.kernel.org/r/667e1cf3d436de91a5698170a1e98d882905e956.1470704995.git.joe@perches.com Signed-off-by: Joe Perches <joe@perches.com> Cc: Joe Perches <joe@perches.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Change-Id: Iff69c72cb3ed6a73fe0348f65f22bfe3d1ee00c7
The majority of the time spent reading /proc/uid_time_in_state is due to seq_printf calls. Use the faster seq_put_* variations instead. Also skip empty hash buckets in uid_seq_next for a further performance improvement. Bug: 111216804 Test: Read /proc/uid_time_in_state and confirm output is sane Test: Compare read times to confirm performance improvement Change-Id: If8783b498ed73d2ddb186a49438af41ac5ab9957 Signed-off-by: Connor O'Brien <connoro@google.com>
The task structure with reference count incremented while dci client is registered should be updated with reference count decremented in failure case of registration. Change-Id: I093229d83dca2699e0343224756895eff0915e38 Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org> CVE-2020-11160
Added a check to validate map before freeing it to avoid Use after free scenario. Change-Id: Ic723a4fe964a4909119663500018f2a07976105b Signed-off-by: Vamsi krishna Gattupalli <vgattupa@codeaurora.org> CVE-2021-1927
Change-Id: I12366a069c479ca0ea6f7aecf00f208c9edffbd6
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Cherry-picks some commits from https://github.com/LineageOS/android_kernel_razer_msm8998/commits/lineage-18.1