Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Patrick McHardy 334a8132d9 [SKBUFF]: Keep track of writable header len of headerless clones ... Currently NAT (and others) that want to modify cloned skbs copy them, even if in the vast majority of cases its not necessary because the skb is a clone made by TCP and the portion NAT wants to modify is actually writable because TCP release the header reference before cloning. The problem is that there is no clean way for NAT to find out how long the writable header area is, so this patch introduces skb->hdr_len to hold this length. When a headerless skb is cloned skb->hdr_len is set to the current headroom, for regular clones it is copied from the original. A new function skb_clone_writable(skb, len) returns whether the skb is writable up to len bytes from skb->data. To avoid enlarging the skb the mac_len field is reduced to 16 bit and the new hdr_len field is put in the remaining 16 bit. I've done a few rough benchmarks of NAT (not with this exact patch, but a very similar one). As expected it saves huge amounts of system time in case of sendfile, bringing it down to basically the same amount as without NAT, with sendmsg it only helps on loopback, probably because of the large MTU. Transmit a 1GB file using sendfile/sendmsg over eth0/lo with and without NAT: - sendfile eth0, no NAT: sys 0m0.388s - sendfile eth0, NAT: sys 0m1.835s - sendfile eth0: NAT + path: sys 0m0.370s (~ -80%) - sendfile lo, no NAT: sys 0m0.258s - sendfile lo, NAT: sys 0m2.609s - sendfile lo, NAT + patch: sys 0m0.260s (~ -90%) - sendmsg eth0, no NAT: sys 0m2.508s - sendmsg eth0, NAT: sys 0m2.539s - sendmsg eth0, NAT + patch: sys 0m2.445s (no change) - sendmsg lo, no NAT: sys 0m2.151s - sendmsg lo, NAT: sys 0m3.557s - sendmsg lo, NAT + patch: sys 0m2.159s (~ -40%) I expect other users can see a similar performance improvement, packet mangling iptables targets, ipip and ip_gre come to mind .. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>		2007-07-10 22:15:37 -07:00
..
amba
byteorder
dvb
hdlc
isdn
lockd
mlx4	IB/mlx4: Make sure inline data segments don't cross a 64 byte boundary	2007-06-18 09:23:47 -07:00
mmc
mtd
netfilter	[NETFILTER]: nf_conntrack_h323: fix ASN.1 types	2007-05-24 16:42:26 -07:00
netfilter_arp
netfilter_bridge
netfilter_ipv4	[NETFILTER]: ip_tables: fix compat related crash	2007-06-07 13:40:32 -07:00
netfilter_ipv6
nfsd
raid	md: don't write more than is required of the last page of a bitmap	2007-05-23 20:14:14 -07:00
spi	spi doc updates	2007-06-16 13:16:16 -07:00
sunrpc	sendfile: convert nfsd to splice_direct_to_actor()	2007-07-10 08:04:14 +02:00
tc_act
tc_ematch
usb
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi.h
acpi_pmtmr.h
adb.h
adfs_fs.h
adfs_fs_i.h
adfs_fs_sb.h
aer.h
affs_hardblocks.h
agp_backend.h
agpgart.h
aio.h
aio_abi.h
amifd.h
amifdreg.h
amigaffs.h
anon_inodes.h
apm-emulation.h
apm_bios.h
arcdevice.h
arcfb.h
ata.h	[ATA] Add named constant for ATAPI command DEVICE RESET	2007-07-09 12:17:33 -04:00
atalk.h
atm.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmel_pdc.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h
auto_fs.h
auto_fs4.h
auxvec.h
ax25.h
b1lli.h
b1pcmcia.h
backing-dev.h
backlight.h
baycom.h
bcd.h
bfs_fs.h
binfmts.h
bio.h
bit_spinlock.h
bitmap.h
bitops.h
bitrev.h
blkdev.h	[TRIVIAL PATCH] Kill blk_congestion_wait() stub for !CONFIG_BLOCK	2007-07-10 08:03:32 +02:00
blkpg.h
blktrace_api.h
blockgroup_lock.h
bootmem.h	x86_64: allocate sparsemem memmap above 4G	2007-06-01 08:18:27 -07:00
bottom_half.h
bpqether.h
buffer_head.h
bug.h
cache.h
calc64.h
capability.h	capability.h warning fix	2007-05-23 20:14:12 -07:00
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
cfag12864b.h
chio.h
circ_buf.h
clk.h
clockchips.h
clocksource.h
cm4000_cs.h
cn_proc.h
cobalt-nvram.h
coda.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_proc.h
coda_psdev.h
coff.h
com20020.h
compat.h
compiler-gcc.h
compiler-gcc3.h
compiler-gcc4.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
configfs.h
connector.h
console.h
console_struct.h	Protect <linux/console_struct.h> from multiple inclusion	2007-06-08 17:23:34 -07:00
consolemap.h
const.h
cpu.h
cpufreq.h
cpumask.h
cpuset.h
cramfs_fs.h
cramfs_fs_sb.h
crash_dump.h
crc-ccitt.h
crc-itu-t.h
crc16.h
crc32.h
crc32c.h
crypto.h
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dcache.h
dccp.h
dcookies.h
debug_locks.h
debugfs.h
delay.h
delayacct.h
device-mapper.h
device.h
devpts_fs.h
dio.h
dirent.h
display.h
dlm.h	[DLM] variable allocation	2007-07-09 08:23:17 +01:00
dlm_device.h	[DLM] canceling deadlocked lock	2007-07-09 08:22:54 +01:00
dlm_netlink.h	[DLM] add lock timeouts and warnings [2/6]	2007-07-09 08:22:33 +01:00
dm-ioctl.h
dm9000.h
dma-mapping.h
dmaengine.h
dmapool.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1wm.h
ds1286.h
ds17287rtc.h
dtlk.h
edd.h
eeprom_93cx6.h	[PATCH] Add 93cx6 eeprom library	2007-07-08 22:16:36 -04:00
efi.h
efs_dir.h
efs_fs.h
efs_fs_i.h
efs_fs_sb.h
efs_vh.h
eisa.h
elevator.h
elf-em.h
elf-fdpic.h
elf.h
elfcore.h
elfnote.h
err.h
errno.h	Better documentation for ERESTARTSYS	2007-06-01 08:18:29 -07:00
errqueue.h
etherdevice.h	[NET]: Kill eth_copy_and_sum().	2007-07-10 22:08:12 -07:00
ethtool.h
eventfd.h	eventfd: clean compile when CONFIG_EVENTFD=n	2007-06-28 11:34:53 -07:00
eventpoll.h
ext2_fs.h
ext2_fs_sb.h
ext3_fs.h
ext3_fs_i.h
ext3_fs_sb.h
ext3_jbd.h
ext4_fs.h	Define/reserve new ext4 superblock fields	2007-05-31 16:20:15 -04:00
ext4_fs_extents.h	ext4: Extent overlap bugfix	2007-05-31 16:20:15 -04:00
ext4_fs_i.h	EXT4: Fix whitespace	2007-05-31 16:20:14 -04:00
ext4_fs_sb.h
ext4_jbd2.h
fadvise.h
fault-inject.h
fb.h	fbdev: Move declaration of fb_class to <linux/fb.h>	2007-06-01 08:18:28 -07:00
fcdevice.h
fcntl.h
fd.h
fd1772.h
fddidevice.h
fdreg.h
fib_rules.h
file.h
filter.h
firewire-cdev.h	firewire: Document userspace ioctl interface.	2007-07-10 00:07:45 +02:00
firewire-constants.h
firmware.h
flat.h
font.h
freezer.h	freezer: move frozen_process() to kernel/power/process.c	2007-05-23 20:14:11 -07:00
fs.h	Remove remnants of sendfile()	2007-07-10 08:04:15 +02:00
fs_enet_pd.h
fs_stack.h
fs_struct.h
fs_uart_pd.h
fsl_devices.h
fsnotify.h
fuse.h
futex.h	Revert "futex_requeue_pi optimization"	2007-06-18 09:48:41 -07:00
gameport.h
gen_stats.h
genalloc.h
generic_acl.h
generic_serial.h
genetlink.h
genhd.h	genhd: send async notification on media change	2007-05-23 20:14:12 -07:00
getcpu.h
gfp.h
gfs2_ondisk.h	[GFS2] Add nanosecond timestamp feature	2007-07-09 08:23:12 +01:00
gigaset_dev.h
gpio_keys.h
gpio_mouse.h	Input: add gpio-mouse driver	2007-07-10 00:35:17 -04:00
hardirq.h	sched: add in_atomic_preempt_off()	2007-07-09 18:51:58 +02:00
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hdsmart.h
hid-debug.h
hid.h	Merge branches 'debug-module-param' and 'upstream' into for-linus	2007-07-09 14:23:37 +02:00
hiddev.h
highmem.h
highuid.h
hil.h
hil_mlc.h
hippidevice.h
hp_sdc.h
hpet.h
hrtimer.h
htirq.h
hugetlb.h	shm: fix the filename of hugetlb sysv shared memory	2007-06-16 13:16:16 -07:00
hw_random.h
hwmon-sysfs.h
hwmon-vid.h
hwmon.h
hysdn_if.h
i2c-algo-bit.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-dev.h
i2c-gpio.h
i2c-id.h
i2c-isa.h
i2c-ocores.h
i2c-pnx.h
i2c-pxa.h
i2c.h
i2o-dev.h
i2o.h
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h	ide: add short cables support	2007-07-09 23:17:58 +02:00
idr.h
ieee80211.h
if.h
if_addr.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
if_cablemodem.h
if_ec.h
if_eql.h
if_ether.h	Add constant for FCS/CRC length (frame check sequence)	2007-05-21 19:41:19 -04:00
if_fc.h
if_fddi.h
if_frad.h
if_hippi.h
if_infiniband.h
if_link.h	[VLAN]: Use rtnl_link API	2007-07-10 22:15:03 -07:00
if_ltalk.h
if_packet.h
if_plip.h
if_ppp.h
if_pppox.h
if_shaper.h
if_slip.h
if_strip.h
if_tr.h
if_tun.h
if_tunnel.h
if_vlan.h	[VLAN]: Introduce symbolic constants for flag values	2007-07-10 22:15:02 -07:00
if_wanpipe.h
igmp.h
in.h
in6.h
in_route.h
inet.h
inet_diag.h
inetdevice.h	[IPV4]: include sysctl.h from inetdevice.h	2007-06-22 17:04:27 -07:00
init.h
init_task.h
initrd.h
inotify.h
input-polldev.h
input.h	Input: convert from class devices to standard devices	2007-07-10 00:35:17 -04:00
interrupt.h
io.h
ioc3.h
ioc4.h
ioctl.h
ioport.h
ioprio.h	cfq-iosched: fix async queue behaviour	2007-07-10 13:43:25 +02:00
ip.h
ip6_tunnel.h
ipc.h
ipmi.h
ipmi_msgdefs.h
ipmi_smi.h
ipsec.h
ipv6.h	[IPV6] ADDRCONF: Fix conflicts in DEVCONF_xxx constant.	2007-05-31 01:23:36 -07:00
ipv6_route.h
ipx.h
irda.h
irq.h
irq_cpustat.h
irqflags.h
irqreturn.h
isa.h
isapnp.h
isdn.h
isdn_divertif.h
isdn_ppp.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ixjuser.h
jbd.h
jbd2.h
jffs2.h
jhash.h
jiffies.h
journal-head.h
joystick.h
kallsyms.h	include/linux/kallsyms.h must #include <linux/errno.h>	2007-07-07 13:49:51 -07:00
kbd_diacr.h
kbd_kern.h
Kbuild	[IPV4]: The scheduled removal of multipath cached routing support.	2007-07-10 22:05:57 -07:00
kd.h
kdebug.h
kdev_t.h
kernel.h	hexdump: more output formatting	2007-06-08 17:23:34 -07:00
kernel_stat.h
kernelcapi.h
kexec.h
key-ui.h
key.h
keyboard.h
keyctl.h
kfifo.h
klist.h
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject.h
kprobes.h
kref.h
ks0108.h
kthread.h
ktime.h	[KTIME]: Introduce ktime_add_us	2007-07-10 22:15:26 -07:00
kvm.h
kvm_para.h
lapb.h
latency.h
lcd.h
leds.h
libata.h	libata: Support chips with 64K PRD quirk	2007-07-09 12:17:35 -04:00
libps2.h
license.h
limits.h
linkage.h
linux_logo.h
list.h
llc.h
lm_interface.h
lock_dlm_plock.h
lockdep.h
log2.h
loop.h
lp.h
lzo.h	Add LZO1X algorithm to the kernel	2007-07-10 17:51:13 -07:00
m41t00.h
m48t86.h
magic.h
major.h
matroxfb.h
mbcache.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
memory.h
memory_hotplug.h
mempolicy.h
mempool.h
meye.h
migrate.h
mii.h
minix_fs.h
miscdevice.h
mm.h	page_mapping must avoid slub pages	2007-06-21 15:55:12 -07:00
mm_inline.h
mm_types.h
mman.h
mmtimer.h
mmzone.h
mnt_namespace.h
mod_devicetable.h
module.h
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h
msg.h
msi.h
mtio.h
mutex-debug.h
mutex.h
mv643xx.h	[MIPS] Delete Ocelot 3 support.	2007-07-10 17:33:05 +01:00
n_r3964.h
namei.h
nbd.h
ncp.h
ncp_fs.h
ncp_fs_i.h
ncp_fs_sb.h
ncp_mount.h
ncp_no.h
neighbour.h
net.h
netdevice.h	[RTNETLINK]: Link creation API	2007-07-10 22:14:20 -07:00
netfilter.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h
netpoll.h
netrom.h
nfs.h
nfs2.h
nfs3.h
nfs4.h
nfs4_acl.h
nfs4_mount.h
nfs_fs.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_idmap.h
nfs_mount.h
nfs_page.h	NFS: Avoid a deadlock situation on write	2007-05-24 10:44:20 -04:00
nfs_xdr.h
nfsacl.h
nfsd_idmap.h
nl80211.h
nls.h
nmi.h
node.h
nodemask.h
notifier.h
nsc_gpio.h
nsproxy.h
nubus.h
numa.h
nvram.h
oom.h
oprofile.h
page-flags.h
pagemap.h
pagevec.h
param.h
parport.h
parport_pc.h
parser.h
pata_platform.h	Add irq_flags to struct pata_platform_info	2007-07-09 12:17:34 -04:00
patchkey.h
pci-acpi.h
pci.h	pci.h stubs (for EDD build error)	2007-07-01 12:29:44 -07:00
pci_hotplug.h
pci_ids.h	sdhci: add ene controller id	2007-07-09 21:23:08 +02:00
pci_regs.h
pcieport_if.h
pda_power.h	[BATTERY] pda_power platform driver	2007-07-10 11:25:59 +01:00
percpu.h
percpu_counter.h
personality.h
pfkeyv2.h
pfn.h
pg.h
phantom.h
phonedev.h
phy.h
pid.h
pid_namespace.h
pipe_fs_i.h	pipe: add documentation and comments	2007-07-10 08:04:16 +02:00
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform_device.h
plist.h
pm.h	PM: introduce set_target method in pm_ops	2007-07-01 12:29:44 -07:00
pm_legacy.h
pmu.h
pnp.h
pnpbios.h
poison.h
poll.h
posix-timers.h
posix_acl.h
posix_acl_xattr.h
posix_types.h
power_supply.h	[BATTERY] Universal power supply class (was: battery class)	2007-07-10 11:25:44 +01:00
ppdev.h
ppp-comp.h
ppp_channel.h
ppp_defs.h
prctl.h
preempt.h
prefetch.h
prio_tree.h
proc_fs.h
profile.h
ps2esdi.h
ptrace.h
qnx4_fs.h
qnxtypes.h
quicklist.h
quota.h
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h
raid_class.h
ramfs.h
random.h
raw.h
rbtree.h
rcupdate.h
reboot.h
reciprocal_div.h
reiserfs_acl.h
reiserfs_fs.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_xattr.h
relay.h
resource.h
resume-trace.h
rfkill.h	[RFKILL]: Make rfkill->name const	2007-06-07 13:39:34 -07:00
rio.h
rio_drv.h
rio_ids.h
rio_regs.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc-v3020.h
rtc.h
rtmutex.h
rtnetlink.h	[IPV4]: The scheduled removal of multipath cached routing support.	2007-07-10 22:05:57 -07:00
rwsem-spinlock.h
rwsem.h
rxrpc.h
sc26198.h
scatterlist.h
scc.h
sched.h	sched: micro-optimize mmdrop()	2007-07-09 18:52:01 +02:00
screen_info.h
sctp.h
scx200.h
scx200_gpio.h
sdla.h
seccomp.h
securebits.h
security.h
selection.h
selinux.h
selinux_netlink.h
sem.h
seq_file.h	Make common helpers for seq_files that work with list_heads	2007-07-10 17:51:13 -07:00
seqlock.h
serial.h
serial167.h
serial_8250.h
serial_core.h	serial_core.h: include <linux/sysrq.h>	2007-06-01 08:18:29 -07:00
serial_pnx8xxx.h
serial_reg.h
serialP.h
serio.h
shm.h
shmem_fs.h
signal.h
signalfd.h
skbuff.h	[SKBUFF]: Keep track of writable header len of headerless clones	2007-07-10 22:15:37 -07:00
slab.h	slab allocators: MAX_ORDER one off fix	2007-06-24 08:59:12 -07:00
slab_def.h
slub_def.h	SLUB: minimum alignment fixes	2007-06-16 13:16:16 -07:00
sm501-regs.h	SM501: Check SM501 ID register on initialisation	2007-06-24 08:59:11 -07:00
sm501.h
smb.h
smb_fs.h	Fix headers check fallout	2007-05-21 21:47:27 -07:00
smb_fs_i.h
smb_fs_sb.h
smb_mount.h
smbno.h
smp.h
smp_lock.h
snmp.h
socket.h
sockios.h
som.h
sonet.h
sony-laptop.h
sonypi.h
sort.h
sound.h
soundcard.h
spinlock.h
spinlock_api_smp.h
spinlock_api_up.h
spinlock_types.h
spinlock_types_up.h
spinlock_up.h
splice.h	pipe: allow passing around of ops private pointer	2007-07-10 08:04:14 +02:00
srcu.h
stacktrace.h
stallion.h
start_kernel.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h
stringify.h
superhyway.h
suspend.h
svga.h
swap.h
swapops.h
synclink.h
sys.h
syscalls.h	Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM	2007-06-28 11:38:30 -07:00
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
task_io_accounting.h
task_io_accounting_ops.h
taskstats.h
taskstats_kern.h
tc.h
tcp.h
telephony.h
termios.h
textsearch.h
textsearch_fsm.h
tfrc.h
thread_info.h
threads.h
ticable.h
tick.h
tifm.h
time.h
timer.h	NOHZ: prevent multiplication overflow - stop timer for huge timeouts	2007-05-29 18:11:10 -07:00
timerfd.h
times.h
timex.h
tiocl.h
tipc.h
tipc_config.h
topology.h	sched: more agressive idle balancing	2007-07-09 18:52:01 +02:00
toshiba.h
transport_class.h
trdevice.h
tsacct_kern.h
tty.h
tty_driver.h
tty_flip.h
tty_ldisc.h
types.h
uaccess.h
udf_fs.h
udf_fs_i.h
udf_fs_sb.h
udp.h
ufs_fs.h
ufs_fs_i.h
ufs_fs_sb.h
uinput.h
uio.h
ultrasound.h
umem.h
un.h
unistd.h
unwind.h
usb.h	USB: Add USB_DEVICE_INTERFACE_PROTOCOL macro	2007-07-10 00:35:14 -04:00
usb_gadget.h
usb_gadgetfs.h
usb_sl811.h
usb_usual.h
usbdevice_fs.h
user.h
utime.h
uts.h
utsname.h
vermagic.h
vfs.h
via.h
video_decoder.h
video_encoder.h
video_output.h
videodev.h
videodev2.h	V4L/DVB (5736): Add V4L2_FBUF_CAP/FLAG_LOCAL/GLOBAL_INV_ALPHA	2007-06-08 08:21:15 -03:00
videotext.h
vmalloc.h
vmstat.h
vt.h
vt_buffer.h
vt_kern.h
wait.h	sched: clean up sleep_on() APIs	2007-07-09 18:52:01 +02:00
wanrouter.h
watchdog.h
wireless.h
workqueue.h
writeback.h
x25.h
xattr.h
xfrm.h
yam.h
zconf.h
zlib.h
zorro.h
zorro_ids.h
zutil.h