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kernel: compile out SNMP MIB related counting if debloat-proc is active - improves network stack performance 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48239
lede-17.01
Felix Fietkau 2016-01-15 10:47:14 +00:00
parent 1133101bc8
commit 7f11532c58
3 changed files with 132 additions and 0 deletions
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44
target/linux/generic/patches-4.1/902-debloat_proc.patch
View File

@ -339,3 +339,47 @@
remove_proc_entry("dev", net->proc_net);
}
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -123,6 +123,30 @@ struct linux_xfrm_mib {
#define DECLARE_SNMP_STAT(type, name) \
extern __typeof__(type) __percpu *name
+#ifdef CONFIG_PROC_STRIPPED
+#define SNMP_INC_STATS_BH(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_USER(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_DEC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_BH(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_USER(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+
+#else
+
#define SNMP_INC_STATS_BH(mib, field) \
__this_cpu_inc(mib->mibs[field])
@@ -159,8 +183,9 @@ struct linux_xfrm_mib {
__this_cpu_add(ptr[basefield##OCTETS], addend); \
} while (0)
+#endif
-#if BITS_PER_LONG==32
+#if (BITS_PER_LONG==32) && !defined(CONFIG_PROC_STRIPPED)
#define SNMP_ADD_STATS64_BH(mib, field, addend) \
do { \

44
target/linux/generic/patches-4.3/902-debloat_proc.patch
View File

@ -339,3 +339,47 @@
remove_proc_entry("dev", net->proc_net);
}
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -123,6 +123,30 @@ struct linux_xfrm_mib {
#define DECLARE_SNMP_STAT(type, name) \
extern __typeof__(type) __percpu *name
+#ifdef CONFIG_PROC_STRIPPED
+#define SNMP_INC_STATS_BH(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_USER(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_DEC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_BH(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_USER(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+
+#else
+
#define SNMP_INC_STATS_BH(mib, field) \
__this_cpu_inc(mib->mibs[field])
@@ -159,8 +183,9 @@ struct linux_xfrm_mib {
__this_cpu_add(ptr[basefield##OCTETS], addend); \
} while (0)
+#endif
-#if BITS_PER_LONG==32
+#if (BITS_PER_LONG==32) && !defined(CONFIG_PROC_STRIPPED)
#define SNMP_ADD_STATS64_BH(mib, field, addend) \
do { \

44
target/linux/generic/patches-4.4/902-debloat_proc.patch
View File

@ -339,3 +339,47 @@
remove_proc_entry("dev", net->proc_net);
}
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -123,6 +123,30 @@ struct linux_xfrm_mib {
#define DECLARE_SNMP_STAT(type, name) \
extern __typeof__(type) __percpu *name
+#ifdef CONFIG_PROC_STRIPPED
+#define SNMP_INC_STATS_BH(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_USER(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS_ATOMIC_LONG(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_INC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_DEC_STATS(mib, field) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_BH(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS_USER(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_ADD_STATS(mib, field, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+#define SNMP_UPD_PO_STATS_BH(mib, basefield, addend) \
+ do { (void) mib->mibs[0]; } while(0)
+
+#else
+
#define SNMP_INC_STATS_BH(mib, field) \
__this_cpu_inc(mib->mibs[field])
@@ -159,8 +183,9 @@ struct linux_xfrm_mib {
__this_cpu_add(ptr[basefield##OCTETS], addend); \
} while (0)
+#endif
-#if BITS_PER_LONG==32
+#if (BITS_PER_LONG==32) && !defined(CONFIG_PROC_STRIPPED)
#define SNMP_ADD_STATS64_BH(mib, field, addend) \
do { \