16 Dec, 2009
17 commits
-
Christoph pointed out inc_zone_page_state(NR_ISOLATED) should be placed
in right after isolate_page().This patch does it.
Reviewed-by: Christoph Lameter
Signed-off-by: KOSAKI Motohiro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Wu Fengguang
Cc: Andi Kleen
Cc: Avi Kivity
Cc: Greg Kroah-Hartman
Cc: Johannes Berg
Cc: Marcelo Tosatti
Cc: Mark Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Also rename "len" to "sz". No behavior change.
Signed-off-by: Wu Fengguang
Cc: Andi Kleen
Cc: Avi Kivity
Cc: Greg Kroah-Hartman
Cc: Johannes Berg
Cc: Marcelo Tosatti
Cc: Mark Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Also convert more size_inside_page() users.
Signed-off-by: Wu Fengguang
Cc: Andi Kleen
Cc: Avi Kivity
Cc: Greg Kroah-Hartman
Cc: Johannes Berg
Cc: Marcelo Tosatti
Cc: Mark Brown
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
No behaviour change.
[akpm@linux-foundation.org: cleanuplets]
[akpm@linux-foundation.org: remove unused `ret']
Signed-off-by: Wu Fengguang
Acked-by: Andi Kleen
Cc: Marcelo Tosatti
Cc: Greg Kroah-Hartman
Cc: Mark Brown
Cc: Johannes Berg
Cc: Avi Kivity
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce size_inside_page() to replace duplicate /dev/mem code.
Also apply it to /dev/kmem, whose alignment logic was buggy.
Signed-off-by: Wu Fengguang
Acked-by: Andi Kleen
Cc: Marcelo Tosatti
Cc: Greg Kroah-Hartman
Cc: Mark Brown
Cc: Johannes Berg
Cc: Avi Kivity
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The len test in write_kmem() is always true, so can be reduced.
Signed-off-by: Wu Fengguang
Acked-by: Andi Kleen
Cc: Marcelo Tosatti
Cc: Greg Kroah-Hartman
Cc: Mark Brown
Cc: Johannes Berg
Cc: Avi Kivity
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On ia64, the following test program exit abnormally, because glibc thread
library called abort().========================================================
(gdb) bt
#0 0xa000000000010620 in __kernel_syscall_via_break ()
#1 0x20000000003208e0 in raise () from /lib/libc.so.6.1
#2 0x2000000000324090 in abort () from /lib/libc.so.6.1
#3 0x200000000027c3e0 in __deallocate_stack () from /lib/libpthread.so.0
#4 0x200000000027f7c0 in start_thread () from /lib/libpthread.so.0
#5 0x200000000047ef60 in __clone2 () from /lib/libc.so.6.1
========================================================The fact is, glibc call munmap() when thread exitng time for freeing
stack, and it assume munlock() never fail. However, munmap() often make
vma splitting and it with many mapcount make -ENOMEM.Oh well, that's crazy, because stack unmapping never increase mapcount.
The maxcount exceeding is only temporary. internal temporary exceeding
shouldn't make ENOMEM.This patch does it.
test_max_mapcount.c
==================================================================
#include
#include
#include
#include
#include
#include#define THREAD_NUM 30000
#define MAL_SIZE (8*1024*1024)void *wait_thread(void *args)
{
void *addr;addr = malloc(MAL_SIZE);
sleep(10);return NULL;
}void *wait_thread2(void *args)
{
sleep(60);return NULL;
}int main(int argc, char *argv[])
{
int i;
pthread_t thread[THREAD_NUM], th;
int ret, count = 0;
pthread_attr_t attr;ret = pthread_attr_init(&attr);
if(ret) {
perror("pthread_attr_init");
}ret = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
if(ret) {
perror("pthread_attr_setdetachstate");
}for (i = 0; i < THREAD_NUM; i++) {
ret = pthread_create(&th, &attr, wait_thread, NULL);
if(ret) {
fprintf(stderr, "[%d] ", count);
perror("pthread_create");
} else {
printf("[%d] create OK.\n", count);
}
count++;ret = pthread_create(&thread[i], &attr, wait_thread2, NULL);
if(ret) {
fprintf(stderr, "[%d] ", count);
perror("pthread_create");
} else {
printf("[%d] create OK.\n", count);
}
count++;
}sleep(3600);
return 0;
}
==================================================================[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: KOSAKI Motohiro
Signed-off-by: Hugh Dickins
Cc: KAMEZAWA Hiroyuki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
On a system with large amount of memory (256GB), invoking page-types can
take quite a long time, which is unreasonable considering the user only
wants a description of the flags:# time ./page-types -d 0x10
0x0000000000000010 ____D_____________________________ dirtyreal 0m34.285s
user 0m1.966s
sys 0m32.313sThis is because we still walk the entire address range.
Exiting early seems like a reasonble solution:
# time ./page-types -d 0x10
0x0000000000000010 ____D_____________________________ dirtyreal 0m0.007s
user 0m0.001s
sys 0m0.005sSigned-off-by: Alex Chiang
Cc: Andi Kleen
Cc: Haicheng Li
Acked-by: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Align the output when page-type -h is invoked.
Signed-off-by: Alex Chiang
Acked-by: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Teach page-types to describe page flags directly from the command line.
Why is this useful? For instance, if you're using memory hotplug and see
this in /var/log/messages:kernel: removing from LRU failed 3836dd0/1/1e00000000000010
It would be nice to decode those page flags without staring at the source.
Example usage and output:
# Documentation/vm/page-types -d 0x10
0x0000000000000010 ____D_____________________________ dirty# Documentation/vm/page-types -d anon
0x0000000000001000 ____________a_____________________ anonymous# Documentation/vm/page-types -d anon,0x10
0x0000000000001010 ____D_______a_____________________ dirty,anonymous[achiang@hp.com: documentation]
Signed-off-by: Alex Chiang
Signed-off-by: Wu Fengguang
Cc: Andi Kleen
Cc: Haicheng Li
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If not signed, testing of the read() return value in this function
will not work.Signed-off-by: Roel Kluin
Cc: Wu Fengguang
Cc: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Tommi Rantala
Cc: Randy Dunlap
Cc: Wu Fengguang
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The oom killer header, including information such as the allocation order
and gfp mask, current's cpuset and memory controller, call trace, and VM
state information is currently only shown when the oom killer has selected
a task to kill.This information is omitted, however, when the oom killer panics either
because of panic_on_oom sysctl settings or when no killable task was
found. It is still relevant to know crucial pieces of information such as
the allocation order and VM state when diagnosing such issues, especially
at boot.This patch displays the oom killer header whenever it panics so that bug
reports can include pertinent information to debug the issue, if possible.Signed-off-by: David Rientjes
Reviewed-by: KOSAKI Motohiro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Sam was fine with handing over kbuild maintainership to me. The git
trees are already in linux-next, a merge request will follow shortly.Acked-by: Sam Ravnborg
Signed-off-by: Michal Marek
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
A specially-crafted Hierarchical File System (HFS) filesystem could cause
a buffer overflow to occur in a process's kernel stack during a memcpy()
call within the hfs_bnode_read() function (at fs/hfs/bnode.c:24). The
attacker can provide the source buffer and length, and the destination
buffer is a local variable of a fixed length. This local variable (passed
as "&entry" from fs/hfs/dir.c:112 and allocated on line 60) is stored in
the stack frame of hfs_bnode_read()'s caller, which is hfs_readdir().
Because the hfs_readdir() function executes upon any attempt to read a
directory on the filesystem, it gets called whenever a user attempts to
inspect any filesystem contents.[amwang@redhat.com: modify this patch and fix coding style problems]
Signed-off-by: WANG Cong
Cc: Eugene Teo
Cc: Roman Zippel
Cc: Al Viro
Cc: Christoph Hellwig
Cc: Alexey Dobriyan
Cc: Dave Anderson
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
commit d8e180dcd5bbbab9cd3ff2e779efcf70692ef541 "bsdacct: switch
credentials for writing to the accounting file" introduced credential
switching during final acct data collecting. However, uid/gid pair
continued to be collected from current which became credentials of who
created acct file, not who exits.Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14676
Signed-off-by: Alexey Dobriyan
Reported-by: Juho K. Juopperi
Acked-by: Serge Hallyn
Acked-by: David Howells
Reviewed-by: Michal Schmidt
Cc: James Morris
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Dec, 2009
23 commits
-
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-core: i2c bus should support PM entries in struct dev_pm_ops
i2c: Get rid of I2C_CLIENT_MODULE_PARM
i2c: Drop I2C_CLIENT_INSMOD_2 to 8
i2c: Drop I2C_CLIENT_INSMOD_1
i2c: Get rid of struct i2c_client_address_data
i2c: Drop the kind parameter from detect callbacks -
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6:
udf: Avoid IO in udf_clear_inode
udf: Try harder when looking for VAT inode
udf: Fix compilation with UDFFS_DEBUG enabled -
It is not very good to do IO in udf_clear_inode. First, VFS does not really
expect inode to become dirty there and thus we have to write it ourselves,
second, memory reclaim gets blocked waiting for IO when it does not really
expect it, third, the IO pattern (e.g. on umount) resulting from writes in
udf_clear_inode is bad and it slows down writing a lot.The reason why UDF needed to do IO in udf_clear_inode is that UDF standard
mandates extent length to exactly match inode size. But when we allocate
extents to a file or directory, we don't really know what exactly the final
file size will be and thus temporarily set it to block boundary and later
truncate it to exact length in udf_clear_inode. Now, this is changed to
truncate to final file size in udf_release_file for regular files. For
directories and symlinks, we do the truncation at the moment when learn
what the final file size will be.Signed-off-by: Jan Kara
-
Some disks do not contain VAT inode in the last recorded block as required
by the standard but a few blocks earlier (or the number of recorded blocks
is wrong). So look for the VAT inode a bit before the end of the media.Signed-off-by: Jan Kara
-
Signed-off-by: Jan Kara
-
…git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, mce: Clean up thermal init by introducing intel_thermal_supported()
x86, mce: Thermal monitoring depends on APIC being enabled
x86: Gart: fix breakage due to IOMMU initialization cleanup
x86: Move swiotlb initialization before dma32_free_bootmem
x86: Fix build warning in arch/x86/mm/mmio-mod.c
x86: Remove usedac in feature-removal-schedule.txt
x86: Fix duplicated UV BAU interrupt vector
nvram: Fix write beyond end condition; prove to gcc copy is safe
mm: Adjust do_pages_stat() so gcc can see copy_from_user() is safe
x86: Limit the number of processor bootup messages
x86: Remove enabling x2apic message for every CPU
doc: Add documentation for bootloader_{type,version}
x86, msr: Add support for non-contiguous cpumasks
x86: Use find_e820() instead of hard coded trampoline address
x86, AMD: Fix stale cpuid4_info shared_map data in shared_cpu_map cpumasksTrivial percpu-naming-introduced conflicts in arch/x86/kernel/cpu/intel_cacheinfo.c
-
* git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6:
pcmcia: CodingStyle fixes
pcmcia: remove unused IRQ_FIRST_SHARED -
Struct dev_pm_ops is not configured in current i2c bus type. i2c drivers
only depends on suspend/resume entries in struct dev_pm_ops are not
informed of PM suspend and resume events by i2c framework.Signed-off-by: Sonic Zhang
Signed-off-by: Jean Delvare -
There is no user left of I2C_CLIENT_MODULE_PARM, so we can finally
get rid of this ugly macro.Signed-off-by: Jean Delvare
Tested-by: Wolfram Sang -
These macros simply declare an enum, so drivers might as well declare
it themselves. This puts an end to the arbitrary limit of 8 chip types
per i2c driver.Signed-off-by: Jean Delvare
Tested-by: Wolfram Sang -
This macro simply declares an enum, so drivers might as well declare
it themselves.Signed-off-by: Jean Delvare
Tested-by: Wolfram Sang -
Struct i2c_client_address_data only contains one field at this point,
which makes its usefulness questionable. Get rid of it and pass simple
address lists around instead.Signed-off-by: Jean Delvare
Tested-by: Wolfram Sang -
The "kind" parameter always has value -1, and nobody is using it any
longer, so we can remove it.Signed-off-by: Jean Delvare
Tested-by: Wolfram Sang -
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (23 commits)
spi: fix probe/remove section markings
Add OMAP spi100k driver
spi-imx: don't access struct device directly but use dev_get_platdata
spi-imx: Add mx25 support
spi-imx: use positive logic to distinguish cpu variants
spi-imx: correct check for platform_get_irq failing
ARM: NUC900: Add spi driver support for nuc900
spi: SuperH MSIOF SPI Master driver V2
spi: fix spidev compilation failure when VERBOSE is defined
spi/au1550_spi: fix setupxfer not to override cfg with zeros
spi/mpc8xxx: don't use __exit_p to wrap plat_mpc8xxx_spi_remove
spi/i.MX: fix broken error handling for gpio_request
spi/i.mx: drain MXC SPI transfer buffer when probing device
MAINTAINERS: add SPI co-maintainer.
spi/xilinx_spi: fix incorrect casting
spi/mpc52xx-spi: minor cleanups
xilinx_spi: add a platform driver using the xilinx_spi common module.
xilinx_spi: add support for the DS570 IP.
xilinx_spi: Switch to iomem functions and support little endian.
xilinx_spi: Split into of driver and generic part.
... -
…/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf sched: Fix build failure on sparc
perf bench: Add "all" pseudo subsystem and "all" pseudo suite
perf tools: Introduce perf_session class
perf symbols: Ditch dso->find_symbol
perf symbols: Allow lookups by symbol name too
perf symbols: Add missing "Variables" entry to map_type__name
perf symbols: Add support for 'variable' symtabs
perf symbols: Introduce ELF counterparts to symbol_type__is_a
perf symbols: Introduce symbol_type__is_a
perf symbols: Rename kthreads to kmaps, using another abstraction for it
perf tools: Allow building for ARM
hw-breakpoints: Handle bad modify_user_hw_breakpoint off-case return value
perf tools: Allow cross compiling
tracing, slab: Fix no callsite ifndef CONFIG_KMEMTRACE
tracing, slab: Define kmem_cache_alloc_notrace ifdef CONFIG_TRACINGTrivial conflict due to different fixes to modify_user_hw_breakpoint()
in include/linux/hw_breakpoint.h -
Global variable declarations must match the definitions in section attributes
as the compiler is at liberty to vary the method it uses to access a variable,
depending on the section it is in.When building the FRV arch, I now see:
drivers/built-in.o: In function `pci_apply_final_quirks':
drivers/pci/quirks.c:2606: relocation truncated to fit: R_FRV_GPREL12 against symbol `pci_dfl_cache_line_size' defined in .devinit.data section in drivers/built-in.o
drivers/pci/quirks.c:2623: relocation truncated to fit: R_FRV_GPREL12 against symbol `pci_dfl_cache_line_size' defined in .devinit.data section in drivers/built-in.o
drivers/pci/quirks.c:2630: relocation truncated to fit: R_FRV_GPREL12 against symbol `pci_dfl_cache_line_size' defined in .devinit.data section in drivers/built-in.obecause the declaration of pci_dfl_cache_line_size in linux/pci.h does not
match the definition in drivers/pci/pci.c.Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
If there is no hardware breakpoint support, modify_user_hw_breakpoint()
tries to return a NULL pointer through as an 'int' return value:In file included from kernel/exit.c:53:
include/linux/hw_breakpoint.h: In function 'modify_user_hw_breakpoint':
include/linux/hw_breakpoint.h:96: warning: return makes integer from pointer without a castReturn 0 instead.
Signed-off-by: David Howells
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: (46 commits)
microblaze: Remove rt_sigsuspend wrapper
microblaze: nommu: Don't clobber R11 on syscalls
microblaze: Remove show_tmem function
microblaze: Support for WB cache
microblaze: Add PVR for Microblaze v7.30.a
microblaze: Remove ancient and fake microblaze version from cpu_ver table
microblaze: Remove panic_timeout init value
microblaze: Do not count system calls in default
microblaze: Enable DTC compilation
microblaze: Core oprofile configs and hooks
microblaze: Fix level interrupt ACKing
microblaze: Enable futimesat syscall
microblaze: Checking DTS against PVR for write-back cache
microblaze: Remove duplicity from pgalloc.h
microblaze: Futex support
microblaze: Adding dev_arch_data functions
microblaze: Fix the heartbeat gpio to be more robust
microblaze: Simple __copy_tofrom_user for noMMU
microblaze: Export memory_start for modules
microblaze: Use lowest-common-denominator default CPU settings
... -
* 'for-linus' of git://neil.brown.name/md: (27 commits)
md: add 'recovery_start' per-device sysfs attribute
md: rcu_read_lock() walk of mddev->disks in md_do_sync()
md: integrate spares into array at earliest opportunity.
md: move compat_ioctl handling into md.c
md: revise Kconfig help for MD_MULTIPATH
md: add MODULE_DESCRIPTION for all md related modules.
raid: improve MD/raid10 handling of correctable read errors.
md/raid10: print more useful messages on device failure.
md/bitmap: update dirty flag when bitmap bits are explicitly set.
md: Support write-intent bitmaps with externally managed metadata.
md/bitmap: move setting of daemon_lastrun out of bitmap_read_sb
md: support updating bitmap parameters via sysfs.
md: factor out parsing of fixed-point numbers
md: support bitmap offset appropriate for external-metadata arrays.
md: remove needless setting of thread->timeout in raid10_quiesce
md: change daemon_sleep to be in 'jiffies' rather than 'seconds'.
md: move offset, daemon_sleep and chunksize out of bitmap structure
md: collect bitmap-specific fields into one structure.
md/raid1: add takeover support for raid5->raid1
md: add honouring of suspend_{lo,hi} to raid1.
... -
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (58 commits)
mfd: Add twl6030 regulator subdevices
regulator: Add support for twl6030 regulators
rtc: Add twl6030 RTC support
mfd: Add support for twl6030 irq framework
mfd: Rename twl4030_ routines in twl-regulator.c
mfd: Rename twl4030_ routines in rtc-twl.c
mfd: Rename all twl4030_i2c*
mfd: Rename twl4030* driver files to enable re-use
mfd: Clarify twl4030 return value for read and write
mfd: Add all twl4030 regulators to the twl4030 mfd driver
mfd: Don't set mc13783 ADREFMODE for touch conversions
mfd: Remove ezx-pcap defines for custom led gpio encoding
mfd: Near complete mc13783 rewrite
mfd: Remove build time warning for WM835x register default tables
mfd: Force I2C to be built in when building WM831x
mfd: Don't allow wm831x to be built as a module
mfd: Fix incorrect error check for wm8350-core
mfd: Fix twl4030 warning
gpiolib: Implement gpio_to_irq() for wm831x
mfd: Remove default selection of AB4500
... -
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: fix lh7a40x build
ARM: fix sa1100 build
ARM: fix clps711x, footbridge, integrator, ixp2000, ixp2300 and s3c build bug
ARM: VFP: fix vfp thread init bug and document vfp notifier entry conditions
ARM: pxa: fix now incorrect reference of skt->irq by using skt->socket.pci_irq
[ARM] pxa/zeus: default configuration for Arcom Zeus SBC.
[ARM] pxa/zeus: make Viper pcmcia support more generic to support Zeus
[ARM] pxa/zeus: basic support for Arcom Zeus SBC
[ARM] pxa/em-x270: fix usb hub power up/reset sequence
PCMCIA: fix pxa2xx_lubbock modular build error
ARM: RealView: Fix typo in the RealView/PBX Kconfig entry
ARM: Do not allow the probing of the local timer
ARM: Add an earlyprintk debug console -
* git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (75 commits)
NFS: Fix nfs_migrate_page()
rpc: remove unneeded function parameter in gss_add_msg()
nfs41: Invoke RECLAIM_COMPLETE on all new client ids
SUNRPC: IS_ERR/PTR_ERR confusion
NFSv41: Fix a potential state leakage when restarting nfs4_close_prepare
nfs41: Handle NFSv4.1 session errors in the delegation recall code
nfs41: Retry delegation return if it failed with session error
nfs41: Handle session errors during delegation return
nfs41: Mark stateids in need of reclaim if state manager gets stale clientid
NFS: Fix up the declaration of nfs4_restart_rpc when NFSv4 not configured
nfs41: Don't clear DRAINING flag on NFS4ERR_STALE_CLIENTID
nfs41: nfs41_setup_state_renewal
NFSv41: More cleanups
NFSv41: Fix up some bugs in the NFS4CLNT_SESSION_DRAINING code
NFSv41: Clean up slot table management
NFSv41: Fix nfs4_proc_create_session
nfs41: Invoke RECLAIM_COMPLETE
nfs41: RECLAIM_COMPLETE functionality
nfs41: RECLAIM_COMPLETE XDR functionality
Cleanup some NFSv4 XDR decode comments
... -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (34 commits)
m68k: rename global variable vmalloc_end to m68k_vmalloc_end
percpu: add missing per_cpu_ptr_to_phys() definition for UP
percpu: Fix kdump failure if booted with percpu_alloc=page
percpu: make misc percpu symbols unique
percpu: make percpu symbols in ia64 unique
percpu: make percpu symbols in powerpc unique
percpu: make percpu symbols in x86 unique
percpu: make percpu symbols in xen unique
percpu: make percpu symbols in cpufreq unique
percpu: make percpu symbols in oprofile unique
percpu: make percpu symbols in tracer unique
percpu: make percpu symbols under kernel/ and mm/ unique
percpu: remove some sparse warnings
percpu: make alloc_percpu() handle array types
vmalloc: fix use of non-existent percpu variable in put_cpu_var()
this_cpu: Use this_cpu_xx in trace_functions_graph.c
this_cpu: Use this_cpu_xx for ftrace
this_cpu: Use this_cpu_xx in nmi handling
this_cpu: Use this_cpu operations in RCU
this_cpu: Use this_cpu ops for VM statistics
...Fix up trivial (famous last words) global per-cpu naming conflicts in
arch/x86/kvm/svm.c
mm/slab.c
