Jens Axboe 1e42807918 block: reduce stack footprint of blk_recount_segments() ... blk_recalc_rq_segments() requires a request structure passed in, which we don't have from blk_recount_segments(). So the latter allocates one on the stack, using > 400 bytes of stack for that. This can cause us to spill over one page of stack from ext4 at least: 0) 4560 400 blk_recount_segments+0x43/0x62 1) 4160 32 bio_phys_segments+0x1c/0x24 2) 4128 32 blk_rq_bio_prep+0x2a/0xf9 3) 4096 32 init_request_from_bio+0xf9/0xfe 4) 4064 112 __make_request+0x33c/0x3f6 5) 3952 144 generic_make_request+0x2d1/0x321 6) 3808 64 submit_bio+0xb9/0xc3 7) 3744 48 submit_bh+0xea/0x10e 8) 3696 368 ext4_mb_init_cache+0x257/0xa6a [ext4] 9) 3328 288 ext4_mb_regular_allocator+0x421/0xcd9 [ext4] 10) 3040 160 ext4_mb_new_blocks+0x211/0x4b4 [ext4] 11) 2880 336 ext4_ext_get_blocks+0xb61/0xd45 [ext4] 12) 2544 96 ext4_get_blocks_wrap+0xf2/0x200 [ext4] 13) 2448 80 ext4_da_get_block_write+0x6e/0x16b [ext4] 14) 2368 352 mpage_da_map_blocks+0x7e/0x4b3 [ext4] 15) 2016 352 ext4_da_writepages+0x2ce/0x43c [ext4] 16) 1664 32 do_writepages+0x2d/0x3c 17) 1632 144 __writeback_single_inode+0x162/0x2cd 18) 1488 96 generic_sync_sb_inodes+0x1e3/0x32b 19) 1392 16 sync_sb_inodes+0xe/0x10 20) 1376 48 writeback_inodes+0x69/0xb3 21) 1328 208 balance_dirty_pages_ratelimited_nr+0x187/0x2f9 22) 1120 224 generic_file_buffered_write+0x1d4/0x2c4 23) 896 176 __generic_file_aio_write_nolock+0x35f/0x393 24) 720 80 generic_file_aio_write+0x6c/0xc8 25) 640 80 ext4_file_write+0xa9/0x137 [ext4] 26) 560 320 do_sync_write+0xf0/0x137 27) 240 48 vfs_write+0xb3/0x13c 28) 192 64 sys_write+0x4c/0x74 29) 128 128 system_call_fastpath+0x16/0x1b Split the segment counting out into a __blk_recalc_rq_segments() helper to avoid allocating an onstack request just for checking the physical segment count. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2009-02-26 10:45:48 +01:00
..
amba
byteorder
can
dvb
hdlc
i2c
isdn
lockd
mfd
mlx4
mmc
mtd
netfilter
netfilter_arp
netfilter_bridge
netfilter_ipv4
netfilter_ipv6
nfsd
raid
regulator
rtc
spi	spi_bitbang: add more lowlevel function documentation	2009-02-20 17:57:49 -08:00
ssb
sunrpc
tc_act
tc_ematch
unaligned
usb
uwb
wimax
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi_pmtmr.h
acpi.h
adb.h
adfs_fs_i.h
adfs_fs_sb.h
adfs_fs.h
aer.h
affs_hardblocks.h
agp_backend.h
agpgart.h
aio_abi.h
aio.h
amifd.h
amifdreg.h
amigaffs.h
anon_inodes.h
apm_bios.h
apm-emulation.h
arcdevice.h
arcfb.h
async_tx.h
async.h	async: Rename _special -> _domain for clarity.	2009-02-08 09:56:11 -08:00
ata_platform.h
ata.h	ide/libata: fix ata_id_is_cfa() (take 4)	2009-02-02 22:45:10 -05:00
atalk.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmel_pdc.h
atmel_pwm.h
atmel_serial.h
atmel_tc.h
atmel-mci.h
atmel-pwm-bl.h
atmel-ssc.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h
auto_dev-ioctl.h
auto_fs4.h
auto_fs.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	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
bit_spinlock.h
bitmap.h
bitops.h
bitrev.h
blkdev.h	block: reduce stack footprint of blk_recount_segments()	2009-02-26 10:45:48 +01:00
blkpg.h
blktrace_api.h	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
blockgroup_lock.h
bootmem.h
bottom_half.h
bpqether.h
brcmphy.h
bsg.h
buffer_head.h
bug.h
c2port.h
cache.h
can.h
capability.h
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
cfag12864b.h
cgroup_subsys.h
cgroup.h	cgroups: fix lockdep subclasses overflow	2009-02-11 14:25:36 -08:00
cgroupstats.h
chio.h
circ_buf.h
clk.h
clockchips.h
clocksource.h
cm4000_cs.h
cn_proc.h
cnt32_to_63.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_psdev.h
coda.h
coff.h
com20020.h
compat.h
compiler-gcc3.h
compiler-gcc4.h
compiler-gcc.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
configfs.h
connector.h
console_struct.h
console.h
consolemap.h
const.h
cpu.h
cpufreq.h
cpuidle.h
cpumask.h
cpuset.h
cramfs_fs_sb.h
cramfs_fs.h
crash_dump.h
crc7.h
crc16.h
crc32.h
crc32c.h
crc-ccitt.h
crc-itu-t.h
crc-t10dif.h
cred.h
crypto.h	crypto: api - Fix zeroing on free	2009-02-05 16:48:53 +11:00
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dca.h
dcache.h
dcbnl.h
dccp.h
dcookies.h
debug_locks.h
debugfs.h
debugobjects.h
delay.h
delayacct.h
device_cgroup.h
device-mapper.h
device.h	Consolidate driver_probe_done() loops into one place	2009-02-21 14:17:17 -08:00
devpts_fs.h
dio.h
dirent.h
display.h
dlm_device.h
dlm_netlink.h
dlm_plock.h
dlm.h
dlmconstants.h
dm9000.h
dm-dirty-log.h
dm-io.h
dm-ioctl.h
dm-kcopyd.h
dm-region-hash.h
dma_remapping.h
dma-attrs.h
dma-mapping.h
dmaengine.h	atmel-mci: fix initialization of dma slave data	2009-02-18 15:37:55 -08:00
dmapool.h
dmar.h
dmi.h
dn.h
dnotify.h
dqblk_qtree.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1wm.h
ds1286.h
ds17287rtc.h
dtlk.h
dw_dmac.h
dynamic_printk.h
edac.h
edd.h
eeprom_93cx6.h
efi.h
efs_fs_sb.h
efs_vh.h
eisa.h
elevator.h
elf-em.h
elf-fdpic.h
elf.h
elfcore-compat.h
elfcore.h
elfnote.h
enclosure.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h
eventfd.h
eventpoll.h
exportfs.h
ext2_fs_sb.h
ext2_fs.h
ext3_fs_i.h
ext3_fs_sb.h
ext3_fs.h
ext3_jbd.h
f75375s.h
fadvise.h
falloc.h
fault-inject.h
fb.h	fbmem: don't call copy_from/to_user() with mutex held	2009-02-05 12:56:46 -08:00
fcdevice.h
fcntl.h
fd.h
fddidevice.h
fdreg.h
fdtable.h
fib_rules.h
fiemap.h
file.h
filter.h
firewire-cdev.h
firewire-constants.h
firmware-map.h	Bernhard has moved	2009-02-18 15:37:56 -08:00
firmware.h
flat.h
font.h
freezer.h
fs_enet_pd.h
fs_stack.h
fs_struct.h
fs_uart_pd.h
fs.h	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-02-18 18:33:04 -08:00
fsl_devices.h
fsnotify.h
ftrace_irq.h
ftrace.h
fuse.h
futex.h
gameport.h
gen_stats.h
genalloc.h
generic_acl.h
generic_serial.h
genetlink.h
genhd.h
getcpu.h
gfp.h
gfs2_ondisk.h
gigaset_dev.h
gpio_keys.h
gpio_mouse.h
gpio.h
hardirq.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hid-debug.h
hid.h
hiddev.h
hidraw.h
highmem.h
highuid.h
hil_mlc.h
hil.h
hippidevice.h
hp_sdc.h
hpet.h
hrtimer.h
htirq.h
hugetlb.h	hugetlbfs: fix build failure with !CONFIG_HUGETLBFS	2009-02-10 14:56:59 -08:00
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-dev: Clarify the unit of ioctl I2C_TIMEOUT	2009-02-24 19:19:49 +01:00
i2c-gpio.h
i2c-id.h
i2c-ocores.h
i2c-pca-platform.h
i2c-pnx.h
i2c-pxa.h
i2c.h	i2c-dev: Clarify the unit of ioctl I2C_TIMEOUT	2009-02-24 19:19:49 +01:00
i2o-dev.h
i2o.h
i8k.h
i7300_idle.h
i8042.h
ibmtr.h
icmp.h
icmpv6.h
ide.h	ide: fix refcounting in device drivers	2009-02-25 20:28:24 +01:00
idr.h
ieee80211.h
if_addr.h
if_addrlabel.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
if_fc.h
if_fddi.h
if_frad.h
if_hippi.h
if_infiniband.h
if_link.h
if_ltalk.h
if_macvlan.h
if_packet.h
if_phonet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h
if_slip.h
if_strip.h
if_tr.h
if_tun.h
if_tunnel.h	net: Fix userland breakage wrt. linux/if_tunnel.h	2009-02-02 13:27:44 -08:00
if_vlan.h	vlan: Update skb->mac_header in __vlan_put_tag().	2009-02-18 23:31:11 -08:00
if.h
igmp.h
ihex.h
in6.h
in_route.h
in.h
inet_diag.h
inet_lro.h
inet.h
inetdevice.h
init_ohci1394_dma.h
init_task.h	timers: split process wide cpu clocks/timers	2009-02-05 13:04:33 +01:00
init.h
initrd.h
inotify.h
input-polldev.h
input.h
intel-iommu.h	VT-d: handle Invalidation Queue Error to avoid system hang	2009-02-09 11:03:17 +00:00
interrupt.h
io-mapping.h
io.h
ioc3.h
ioc4.h
iocontext.h
ioctl.h
iommu-helper.h
iommu.h
ioport.h
ioprio.h
iova.h
ip6_tunnel.h
ip_vs.h
ip.h
ipc_namespace.h
ipc.h
ipmi_msgdefs.h
ipmi_smi.h
ipmi.h
ipsec.h
ipv6_route.h
ipv6.h
ipx.h
irda.h
irq_cpustat.h
irq.h
irqflags.h
irqnr.h
irqreturn.h
isa.h
isapnp.h
iscsi_ibft.h
isdn_divertif.h
isdn_ppp.h
isdn.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ivtv.h
ivtvfb.h
ixjuser.h
jbd2.h	jbd2: Avoid possible NULL dereference in jbd2_journal_begin_ordered_truncate()	2009-02-10 11:15:34 -05:00
jbd.h
jffs2.h
jhash.h
jiffies.h
journal-head.h
joystick.h
kallsyms.h
kbd_diacr.h
kbd_kern.h
Kbuild	Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6	2009-02-02 23:55:27 -08:00
kbuild.h
kd.h
kdebug.h
kdev_t.h
kernel_stat.h
kernel.h	generic swap(): don't return a value from swap()	2009-02-05 12:56:46 -08:00
kernelcapi.h
kexec.h
key-type.h
key.h
keyboard.h
keyctl.h
kfifo.h
kgdb.h
klist.h
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject.h
kprobes.h
kref.h
ks0108.h
kthread.h
ktime.h
kvm_host.h	KVM: Add kvm_arch_sync_events to sync with asynchronize events	2009-02-15 02:47:36 +02:00
kvm_para.h
kvm_types.h
kvm.h	KVM: Avoid using CONFIG_ in userspace visible headers	2009-02-15 02:47:35 +02:00
lapb.h
latencytop.h
lcd.h
leds-pca9532.h
leds.h
lguest_launcher.h
lguest.h
libata.h	libata: implement HORKAGE_1_5_GBPS and apply it to WD My Book	2009-02-02 23:04:31 -05:00
libps2.h
license.h
limits.h
linkage.h
linux_logo.h
list_nulls.h
list.h
llc.h
lm_interface.h
lmb.h
lockdep.h
log2.h
loop.h
lp.h
lzo.h
m48t86.h
magic.h
major.h
map_to_7segment.h
maple.h
marker.h
math64.h
matroxfb.h
mbcache.h
mbus.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
mdio-bitbang.h
mdio-gpio.h
memcontrol.h
memory_hotplug.h
memory.h
mempolicy.h
mempool.h
memstick.h
meye.h
migrate.h
mii.h
minix_fs.h
miscdevice.h
mISDNdsp.h
mISDNhw.h
mISDNif.h
mm_inline.h
mm_types.h
mm.h	mm: clean up for early_pfn_to_nid()	2009-02-18 15:37:55 -08:00
mman.h
mmdebug.h
mmiotrace.h
mmtimer.h
mmu_notifier.h
mmzone.h	mm: fix memmap init for handling memory hole	2009-02-18 15:37:55 -08:00
mnt_namespace.h
mod_devicetable.h
module.h	module: remove over-zealous check in __module_get()	2009-02-07 08:33:01 -08:00
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute6.h
mroute.h
msdos_fs.h
msg.h
msi.h
mtio.h
mutex-debug.h
mutex.h
mv643xx_eth.h
mv643xx_i2c.h
mv643xx.h
n_r3964.h
namei.h
nbd.h
ncp_fs_i.h
ncp_fs_sb.h
ncp_fs.h
ncp_mount.h
ncp_no.h
ncp.h
neighbour.h
net.h
netdevice.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netfilter.h
netlink.h
netpoll.h
netrom.h
nfs2.h
nfs3.h
nfs4_acl.h
nfs4_mount.h
nfs4.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_fs.h
nfs_idmap.h
nfs_iostat.h
nfs_mount.h
nfs_page.h
nfs_xdr.h
nfs.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
nwpserial.h
of_device.h
of_gpio.h
of_i2c.h
of_platform.h
of_spi.h
of.h
oom.h
oprofile.h
oxu210hp.h
page_cgroup.h
page-flags.h
page-isolation.h
pageblock-flags.h
pagemap.h
pagevec.h
param.h
parport_pc.h
parport.h
parser.h
patchkey.h
path.h
pci_hotplug.h
pci_ids.h	8250: fix boot hang with serial console when using with Serial Over Lan port	2009-02-20 17:57:50 -08:00
pci_regs.h
pci-acpi.h
pci-aspm.h
pci.h	PCI: return error on failure to read PCI ROMs	2009-02-04 16:58:41 -08:00
pcieport_if.h
pda_power.h
percpu_counter.h
percpu.h
personality.h
pfkeyv2.h
pfn.h
pg.h
phantom.h
phonedev.h
phonet.h
phy_fixed.h
phy.h
pid_namespace.h
pid.h
pim.h
pipe_fs_i.h
pkt_cls.h
pkt_sched.h	pkt_sched: type should be __u32 in header	2009-02-10 17:18:17 -08:00
pktcdvd.h
platform_device.h
plist.h
pm_qos_params.h
pm_wakeup.h
pm.h	PM: Split up sysdev_[suspend|resume] from device_power_[down|up]	2009-02-22 10:33:44 -08:00
pmu.h
pnp.h
poison.h
poll.h
posix_acl_xattr.h
posix_acl.h
posix_types.h
posix-timers.h
power_supply.h
ppdev.h
ppp_channel.h
ppp_defs.h
ppp-comp.h
prctl.h
preempt.h
prefetch.h
prio_heap.h
prio_tree.h
proc_fs.h
profile.h
proportions.h
ptrace.h
pwm_backlight.h
pwm.h
qnx4_fs.h
qnxtypes.h
quicklist.h
quota.h
quotaops.h
radeonfb.h
radix-tree.h
raid_class.h
ramfs.h
random.h
ratelimit.h
raw.h
rbtree.h
rcuclassic.h
rculist_nulls.h
rculist.h
rcupdate.h
rcupreempt_trace.h
rcupreempt.h
rcutree.h
reboot.h
reciprocal_div.h
regset.h
reiserfs_acl.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_fs.h
reiserfs_xattr.h
relay.h
res_counter.h
resource.h
resume-trace.h
rfkill.h
ring_buffer.h
rio_drv.h
rio_ids.h
rio_regs.h
rio.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc-v3020.h
rtc.h
rtmutex.h
rtnetlink.h
rwsem-spinlock.h
rwsem.h
rxrpc.h
sc26198.h
scatterlist.h
scc.h
sched.h	timers: fix TIMER_ABSTIME for process wide cpu timers	2009-02-11 14:04:21 +01:00
screen_info.h
sctp.h
scx200_gpio.h
scx200.h
sdla.h
seccomp.h
securebits.h
security.h
selection.h
selinux_netlink.h
selinux.h
sem.h
semaphore.h
seq_file_net.h
seq_file.h	seq_file: properly cope with pread	2009-02-18 15:37:53 -08:00
seqlock.h
serial167.h
serial_8250.h
serial_core.h	8250: fix boot hang with serial console when using with Serial Over Lan port	2009-02-20 17:57:50 -08:00
serial_pnx8xxx.h
serial_reg.h
serial_sci.h
serial.h
serialP.h
serio.h
sh_intc.h
shm.h
shmem_fs.h
signal.h
signalfd.h
skbuff.h	net: Kill skb_truesize_check(), it only catches false-positives.	2009-02-17 21:24:05 -08:00
slab_def.h
slab.h	slab: introduce kzfree()	2009-02-20 17:57:48 -08:00
slob_def.h
slub_def.h
sm501-regs.h
sm501.h
smb_fs_i.h
smb_fs_sb.h
smb_fs.h
smb_mount.h
smb.h
smbno.h
smc91x.h
smc911x.h
smp_lock.h
smp.h
smsc911x.h
snmp.h
socket.h
sockios.h
som.h
sonet.h
sony-laptop.h
sonypi.h
sort.h
sound.h
soundcard.h	sound: Remove OSSlib stuff from linux/soundcard.h	2009-02-10 00:02:54 +01:00
spinlock_api_smp.h
spinlock_api_up.h
spinlock_types_up.h
spinlock_types.h
spinlock_up.h
spinlock.h	x86: spinlocks: define dummy __raw_spin_is_contended	2009-02-09 08:15:39 -08:00
splice.h
srcu.h
stacktrace.h
stallion.h
start_kernel.h
stat.h
statfs.h
stddef.h
stop_machine.h
string_helpers.h
string.h
stringify.h
superhyway.h
suspend_ioctls.h
suspend.h
svga.h
swab.h
swap.h
swapops.h
swiotlb.h
synclink.h
sys.h
syscalls.h	syscall define: fix uml compile bug	2009-02-11 14:25:36 -08:00
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
task_io_accounting_ops.h
task_io_accounting.h
taskstats_kern.h
taskstats.h
tc.h
tcp.h
telephony.h
termios.h
textsearch_fsm.h
textsearch.h
tfrc.h
thermal.h
thread_info.h
threads.h
tick.h
tifm.h
time.h
timer.h
timerfd.h	timerfd: add flags check	2009-02-18 15:37:53 -08:00
times.h
timex.h
tiocl.h
tipc_config.h
tipc.h
topology.h
toshiba.h
tracehook.h
tracepoint.h
transport_class.h
trdevice.h
tsacct_kern.h
tty_driver.h
tty_flip.h
tty_ldisc.h
tty.h
typecheck.h
types.h
uaccess.h
ucb1400.h
udf_fs_i.h
udp.h
uinput.h
uio_driver.h
uio.h
ultrasound.h
un.h
unistd.h
usb_usual.h
usb.h
usbdevice_fs.h
user_namespace.h
user.h
utime.h
uts.h
utsname.h
uwb.h
vermagic.h
veth.h
vfs.h
via.h
video_decoder.h
video_encoder.h
video_output.h
videodev2.h
videodev.h
videotext.h
virtio_9p.h
virtio_balloon.h
virtio_blk.h
virtio_config.h
virtio_console.h
virtio_net.h
virtio_pci.h
virtio_ring.h
virtio_rng.h
virtio.h
vmalloc.h	vmalloc: add __get_vm_area_caller()	2009-02-18 15:37:53 -08:00
vmstat.h
vt_buffer.h
vt_kern.h
vt.h
w1-gpio.h
wait.h	wait: prevent exclusive waiter starvation	2009-02-05 12:56:48 -08:00
wanrouter.h
watchdog.h
wimax.h
wireless.h
wlp.h
wm97xx_batt.h
wm97xx.h
workqueue.h
writeback.h
x25.h
xattr.h
xfrm.h
xilinxfb.h
yam.h
zconf.h
zlib.h
zorro_ids.h
zorro.h
zutil.h