/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Subject to the GPL, version 2. */ #ifndef BPF_I_H #define BPF_I_H #include #include #include #include "xmalloc.h" extern void bpf_dump_op_table(void); extern void bpf_dump_all(struct sock_fprog *bpf); extern int __bpf_validate(const struct sock_fprog *bpf); extern uint32_t bpf_run_filter(const struct sock_fprog *bpf, uint8_t *packet, size_t plen); extern void bpf_attach_to_sock(int sock, struct sock_fprog *bpf); extern void bpf_detach_from_sock(int sock); extern int enable_kernel_bpf_jit_compiler(void); extern void bpf_parse_rules(char *rulefile, struct sock_fprog *bpf, uint32_t link_type); #ifdef __WITH_TCPDUMP_LIKE_FILTER extern void bpf_try_compile(const char *rulefile, struct sock_fprog *bpf, uint32_t link_type); #else static inline void bpf_try_compile(const char *rulefile, struct sock_fprog *bpf __maybe_unused, uint32_t link_type __maybe_unused) { panic("Cannot open file %s!\n", rulefile); } #endif static inline void bpf_release(struct sock_fprog *bpf) { free(bpf->filter); } #define BPF_CLASS(code) ((code) & 0x07) #define BPF_LD 0x00 #define BPF_LDX 0x01 #define BPF_ST 0x02 #define BPF_STX 0x03 #define BPF_ALU 0x04 #define BPF_JMP 0x05 #define BPF_RET 0x06 #define BPF_MISC 0x07 #define BPF_SIZE(code) ((code) & 0x18) #define BPF_W 0x00 #define BPF_H 0x08 #define BPF_B 0x10 #define BPF_MODE(code) ((code) & 0xe0) #define BPF_IMM 0x00 #define BPF_ABS 0x20 #define BPF_IND 0x40 #define BPF_MEM 0x60 #define BPF_LEN 0x80 #define BPF_MSH 0xa0 #define BPF_OP(code) ((code) & 0xf0) #define BPF_ADD 0x00 #define BPF_SUB 0x10 #define BPF_MUL 0x20 #define BPF_DIV 0x30 #define BPF_OR 0x40 #define BPF_AND 0x50 #define BPF_LSH 0x60 #define BPF_RSH 0x70 #define BPF_NEG 0x80 #define BPF_MOD 0x90 #define BPF_XOR 0xa0 #define BPF_JA 0x00 #define BPF_JEQ 0x10 #define BPF_JGT 0x20 #define BPF_JGE 0x30 #define BPF_JSET 0x40 #define BPF_SRC(code) ((code) & 0x08) #define BPF_K 0x00 #define BPF_X 0x08 /* ret - BPF_K and BPF_X also apply */ #define BPF_RVAL(code) ((code) & 0x18) #define BPF_A 0x10 #define BPF_MISCOP(code) ((code) & 0xf8) #define BPF_TAX 0x00 #define BPF_TXA 0x80 #ifndef SKF_AD_OFF # define SKF_AD_OFF (-0x1000) #endif #ifndef SKF_AD_PROTOCOL # define SKF_AD_PROTOCOL 0 #endif #ifndef SKF_AD_PKTTYPE # define SKF_AD_PKTTYPE 4 #endif #ifndef SKF_AD_IFINDEX # define SKF_AD_IFINDEX 8 #endif #ifndef SKF_AD_NLATTR # define SKF_AD_NLATTR 12 #endif #ifndef SKF_AD_NLATTR_NEST # define SKF_AD_NLATTR_NEST 16 #endif #ifndef SKF_AD_MARK # define SKF_AD_MARK 20 #endif #ifndef SKF_AD_QUEUE # define SKF_AD_QUEUE 24 #endif #ifndef SKF_AD_HATYPE # define SKF_AD_HATYPE 28 #endif #ifndef SKF_AD_RXHASH # define SKF_AD_RXHASH 32 #endif #ifndef SKF_AD_CPU # define SKF_AD_CPU 36 #endif #ifndef SKF_AD_VLAN_TAG # define SKF_AD_VLAN_TAG 44 #endif #ifndef SKF_AD_VLAN_TAG_PRESENT # define SKF_AD_VLAN_TAG_PRESENT 48 #endif #ifndef SKF_AD_PAY_OFFSET # define SKF_AD_PAY_OFFSET 52 #endif #endif /* BPF_I_H */ ion>space:mode:
authorMel Gorman <mgorman@techsingularity.net>2016-05-19 17:14:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-19 19:12:14 -0700
commit4fcb0971175f6037590d7b7772fe6619261d2165 (patch)
tree963444f36dc778cfb4768aec404d1eb923f0982d
parent3777999dd47ec00ec34a151b1d93c0a2b721e822 (diff)
mm, page_alloc: shorten the page allocator fast path
The page allocator fast path checks page multiple times unnecessarily. This patch avoids all the slowpath checks if the first allocation attempt succeeds. Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat
-rw-r--r--mm/page_alloc.c33
1 files changed, 17 insertions, 16 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c