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authorTony Ambardar <itugrok@yahoo.com>2018-12-17 21:29:33 -0800
committerKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2019-02-11 20:18:48 +0000
commita7370b5179f5c9793fb18d087955f51d9c080715 (patch)
tree84e1bb573cbe269c05a40136e73ab9730ea432cc
parentebcd5226cc0dc1e13531c42c55acba553db6111b (diff)
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kernel: enable CONFIG_BPF_JIT by default
Enable the built-in BPF JIT compiler for all 4.9, 4.14 and 4.19 kernels, which should speed up cBPF and eBPF-based packet filtering (tc, iptables) and packet sniffing (libpcap, tcpdump, fwknopd, etc). This has minimal kernel size impact, increasing the size of uImage-lzma (normally ~2 MB on mips_24kc or mips64el_mips64) by 5 KB for the MIPS32 arch cBPF JIT and by 9 KB for the MIPS64 arch eBPF JIT, on kernel 4.14. With JIT enabled (cBPF only), the standard BPF test module (test_bpf.ko) running on a DIR-835 (mips_24kc) used 33 CPU seconds, but 68 without JIT. This change aligns with the notion of OpenWRT as the network go-to swiss army knife for packet handling, especially on CPU-constrained platforms. Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
-rw-r--r--target/linux/generic/config-4.142
-rw-r--r--target/linux/generic/config-4.192
-rw-r--r--target/linux/generic/config-4.92
3 files changed, 3 insertions, 3 deletions
diff --git a/target/linux/generic/config-4.14 b/target/linux/generic/config-4.14
index 81214a6942..e90d8bf930 100644
--- a/target/linux/generic/config-4.14
+++ b/target/linux/generic/config-4.14
@@ -594,7 +594,7 @@ CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_BOOT_RAW=y
CONFIG_BPF=y
-# CONFIG_BPF_JIT is not set
+CONFIG_BPF_JIT=y
# CONFIG_BPF_JIT_ALWAYS_ON is not set
# CONFIG_BPF_STREAM_PARSER is not set
CONFIG_BPF_SYSCALL=y
diff --git a/target/linux/generic/config-4.19 b/target/linux/generic/config-4.19
index a3470e955c..b77a6fe113 100644
--- a/target/linux/generic/config-4.19
+++ b/target/linux/generic/config-4.19
@@ -614,7 +614,7 @@ CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3
CONFIG_BOOT_RAW=y
CONFIG_BPF=y
# CONFIG_BPFILTER is not set
-# CONFIG_BPF_JIT is not set
+CONFIG_BPF_JIT=y
# CONFIG_BPF_JIT_ALWAYS_ON is not set
# CONFIG_BPF_STREAM_PARSER is not set
CONFIG_BPF_SYSCALL=y
diff --git a/target/linux/generic/config-4.9 b/target/linux/generic/config-4.9
index 9300e06afd..8de01a5306 100644
--- a/target/linux/generic/config-4.9
+++ b/target/linux/generic/config-4.9
@@ -566,7 +566,7 @@ CONFIG_BOOKE_WDT_DEFAULT_TIMEOUT=3
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_BOOT_RAW=y
CONFIG_BPF=y
-# CONFIG_BPF_JIT is not set
+CONFIG_BPF_JIT=y
CONFIG_BPF_SYSCALL=y
# CONFIG_BPQETHER is not set
CONFIG_BQL=y