kk Blog —— 通用基础


date [-d @int|str] [+%s|"+%F %T"]
netstat -ltunp
sar -n DEV 1

编译I9507V内核

源码地址 http://opensource.samsung.com/reception/receptionSub.do?method=sub&sub=F&searchValue=9507

好像三星android4.3版本后的bootloader会检测是否三星自编译内核，不是的会开机提示一下，不影响正常使用。

按照README_Kernel.txt的做。

内核中说明是用4.7编译器，但是4.7编译出来的装上去会挂，不知道为什么。
但是换成4.6编译器就没问题。

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make VARIANT_DEFCONFIG=jftdd_eur_defconfig jf_defconfig SELINUX_DEFCONFIG=selinux_defconfig

最后作成boot.img

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mkbootimg --kernel zImage --ramdisk boot.img-ramdisk.cpio.gz --base 80200000 --ramdisk_offset 1FF8000 --pagesize 2048 --cmdline "console=null androidboot.hardware=qcom user_debug=31 msm_rtb.filter=0x3F ehci-hcd.park=3 maxcpus=4" -o boot.img

tar cf boot.img.tar boot.img
用odin3.10，选择AP项刷入

修改

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diff --git a/Makefile b/Makefile
index 16603ac..6d2b29f 100755
--- a/Makefile
+++ b/Makefile
@@ -193,7 +193,7 @@ SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 export KBUILD_BUILDHOST := $(SUBARCH)
 ARCH     ?=arm
-CROSS_COMPILE    ?=/opt/toolchains/arm-eabi-4.7/bin/arm-eabi-
+CROSS_COMPILE    ?=/home/kk/android/gcc-arm-none-eabi-4_6-2012q4/bin/arm-none-eabi-
 
 # Architecture as present in compile.h
 UTS_MACHINE  := $(ARCH)
diff --git a/arch/arm/configs/jftdd_eur_defconfig b/arch/arm/configs/jftdd_eur_defconfig
index 389a204..2c53b92 100755
--- a/arch/arm/configs/jftdd_eur_defconfig
+++ b/arch/arm/configs/jftdd_eur_defconfig
@@ -2,3 +2,5 @@ CONFIG_MACH_JF_EUR=y
 CONFIG_MACH_JFTDD_EUR=y
 CONFIG_EXTRA_FIRMWARE="audience-es325-fw-eur.bin"
 CONFIG_EXTRA_FIRMWARE_DIR="firmware"
+CONFIG_LOCALVERSION="-chn-kk"
+CONFIG_LOCALVERSION_AUTO=n
diff --git a/include/linux/printk.h b/include/linux/printk.h
index 0525927..4dbc5cf 100755
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -98,7 +98,13 @@ extern void printk_tick(void);
 asmlinkage __printf(1, 0)
 int vprintk(const char *fmt, va_list args);
 asmlinkage __printf(1, 2) __cold
-int printk(const char *fmt, ...);
+
+static __always_inline int printk(const char *fmt, ...)
+{
+ return 0;
+}
+
+int orig_printk(const char *s, ...);
 
 /*
  * Special printk facility for scheduler use only, _DO_NOT_USE_ !
diff --git a/include/net/tcp.h b/include/net/tcp.h
index a70c0e4..0d13553 100755
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -140,9 +140,9 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
                                   * for local resources.
                                   */
 
-#define TCP_KEEPALIVE_TIME   (120*60*HZ) /* two hours */
-#define TCP_KEEPALIVE_PROBES 9       /* Max of 9 keepalive probes    */
-#define TCP_KEEPALIVE_INTVL  (75*HZ)
+#define TCP_KEEPALIVE_TIME   (10*60*HZ)  /* 10 mins */
+#define TCP_KEEPALIVE_PROBES 7       /* Max of 7 keepalive probes    */
+#define TCP_KEEPALIVE_INTVL  (60*HZ)
 
 #define MAX_TCP_KEEPIDLE 32767
 #define MAX_TCP_KEEPINTVL    32767
diff --git a/kernel/printk.c b/kernel/printk.c
index f7c85aa..80d2cd0 100755
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -995,7 +995,7 @@ static int have_callable_console(void)
  * See the vsnprintf() documentation for format string extensions over C99.
  */
 
-asmlinkage int printk(const char *fmt, ...)
+asmlinkage int orig_printk(const char *fmt, ...)
 {
  va_list args;
  int r;
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 5f5959c..03ba861 100755
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6912,7 +6912,7 @@ void __init sched_init_smp(void)
 }
 #endif /* CONFIG_SMP */
 
-const_debug unsigned int sysctl_timer_migration = 1;
+const_debug unsigned int sysctl_timer_migration = 0;
 
 int in_sched_functions(unsigned long addr)
 {
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 10def3a..a68e108 100755
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -75,7 +75,7 @@
 #include <asm/unaligned.h>
 #include <net/netdma.h>
 
-int sysctl_tcp_timestamps __read_mostly = 1;
+int sysctl_tcp_timestamps __read_mostly = 0;
 int sysctl_tcp_window_scaling __read_mostly = 1;
 int sysctl_tcp_sack __read_mostly = 1;
 int sysctl_tcp_fack __read_mostly = 1;
@@ -1300,7 +1300,7 @@ static int tcp_match_skb_to_sack(struct sock *sk, struct sk_buff *skb,
          unsigned int new_len = (pkt_len / mss) * mss;
          if (!in_sack && new_len < pkt_len) {
              new_len += mss;
-             if (new_len > skb->len)
+             if (new_len >= skb->len)
                  return 0;
          }
          pkt_len = new_len;
@@ -4782,7 +4782,7 @@ restart:
      int copy = SKB_MAX_ORDER(header, 0);
 
      /* Too big header? This can happen with IPv6. */
-     if (copy < 0)
+     if (copy <= 0)
          return;
      if (end - start < copy)
          copy = end - start;
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 3cabafb..6b36c25 100755
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -27,7 +27,7 @@
 #include <net/inet_common.h>
 #include <net/xfrm.h>
 
-int sysctl_tcp_syncookies __read_mostly = 1;
+int sysctl_tcp_syncookies __read_mostly = 0;
 EXPORT_SYMBOL(sysctl_tcp_syncookies);
 
 int sysctl_tcp_abort_on_overflow __read_mostly;
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index 72b5088..7c54171 100755
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -50,7 +50,7 @@ static unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] __read_mostly = {
  [SCTP_CONNTRACK_CLOSED]         = 10 SECS,
  [SCTP_CONNTRACK_COOKIE_WAIT]        = 3 SECS,
  [SCTP_CONNTRACK_COOKIE_ECHOED]      = 3 SECS,
- [SCTP_CONNTRACK_ESTABLISHED]        = 5 DAYS,
+ [SCTP_CONNTRACK_ESTABLISHED]        = 20 MINS,
  [SCTP_CONNTRACK_SHUTDOWN_SENT]      = 300 SECS / 1000,
  [SCTP_CONNTRACK_SHUTDOWN_RECD]      = 300 SECS / 1000,
  [SCTP_CONNTRACK_SHUTDOWN_ACK_SENT]  = 3 SECS,
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 0d07a1d..84d55e4 100755
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -32,7 +32,7 @@
 /* "Be conservative in what you do,
     be liberal in what you accept from others."
     If it's non-zero, we mark only out of window RST segments as INVALID. */
-static int nf_ct_tcp_be_liberal __read_mostly = 0;
+static int nf_ct_tcp_be_liberal __read_mostly = 1;
 
 /* If it is set to zero, we disable picking up already established
    connections. */
@@ -67,7 +67,7 @@ static const char *const tcp_conntrack_names[] = {
 static unsigned int tcp_timeouts[TCP_CONNTRACK_TIMEOUT_MAX] __read_mostly = {
  [TCP_CONNTRACK_SYN_SENT]    = 2 MINS,
  [TCP_CONNTRACK_SYN_RECV]    = 60 SECS,
- [TCP_CONNTRACK_ESTABLISHED] = 5 DAYS,
+ [TCP_CONNTRACK_ESTABLISHED] = 20 MINS,
  [TCP_CONNTRACK_FIN_WAIT]    = 2 MINS,
  [TCP_CONNTRACK_CLOSE_WAIT]  = 60 SECS,
  [TCP_CONNTRACK_LAST_ACK]    = 30 SECS,
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 857ea4f..742fe12 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -184,7 +184,7 @@ else
  # LOCALVERSION= is not specified
  if test "${LOCALVERSION+set}" != "set"; then
      scm=$(scm_version --short)
-     res="$res${scm:++}"
+     res="$res${scm:+}"
  fi
 fi