06 May, 2011
1 commit
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This patch adds a multiple message send syscall and is the send
version of the existing recvmmsg syscall. This is heavily
based on the patch by Arnaldo that added recvmmsg.I wrote a microbenchmark to test the performance gains of using
this new syscall:http://ozlabs.org/~anton/junkcode/sendmmsg_test.c
The test was run on a ppc64 box with a 10 Gbit network card. The
benchmark can send both UDP and RAW ethernet packets.64B UDP
batch pkts/sec
1 804570
2 872800 (+ 8 %)
4 916556 (+14 %)
8 939712 (+17 %)
16 952688 (+18 %)
32 956448 (+19 %)
64 964800 (+20 %)64B raw socket
batch pkts/sec
1 1201449
2 1350028 (+12 %)
4 1461416 (+22 %)
8 1513080 (+26 %)
16 1541216 (+28 %)
32 1553440 (+29 %)
64 1557888 (+30 %)We see a 20% improvement in throughput on UDP send and 30%
on raw socket send.[ Add sparc syscall entries. -DaveM ]
Signed-off-by: Anton Blanchard
Signed-off-by: David S. Miller
05 May, 2011
1 commit
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Fix kconfig unmet dependency warning: HAVE_BPF_JIT depends on NET, so
make the "select" of it depend on NET also.warning: (X86) selects HAVE_BPF_JIT which has unmet direct dependencies (NET)
Signed-off-by: Randy Dunlap
Signed-off-by: David S. Miller
30 Apr, 2011
1 commit
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This makes sure that when a driver calls the ethtool's
get/set_settings() callback of another driver, the data passed to it
is clean. This guarantees that speed_hi will be zeroed correctly if
the called callback doesn't explicitely set it: we are sure we don't
get a corrupted speed from the underlying driver. We also take care of
setting the cmd field appropriately (ETHTOOL_GSET/SSET).This applies to dev_ethtool_get_settings(), which now makes sure it
sets up that ethtool command parameter correctly before passing it to
drivers. This also means that whoever calls dev_ethtool_get_settings()
does not have to clean the ethtool command parameter. This function
also becomes an exported symbol instead of an inline.All drivers visible to make allyesconfig under x86_64 have been
updated.Signed-off-by: David Decotigny
Signed-off-by: David S. Miller
28 Apr, 2011
1 commit
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In order to speedup packet filtering, here is an implementation of a
JIT compiler for x86_64It is disabled by default, and must be enabled by the admin.
echo 1 >/proc/sys/net/core/bpf_jit_enable
It uses module_alloc() and module_free() to get memory in the 2GB text
kernel range since we call helpers functions from the generated code.EAX : BPF A accumulator
EBX : BPF X accumulator
RDI : pointer to skb (first argument given to JIT function)
RBP : frame pointer (even if CONFIG_FRAME_POINTER=n)
r9d : skb->len - skb->data_len (headlen)
r8 : skb->dataTo get a trace of generated code, use :
echo 2 >/proc/sys/net/core/bpf_jit_enable
Example of generated code :
# tcpdump -p -n -s 0 -i eth1 host 192.168.20.0/24
flen=18 proglen=147 pass=3 image=ffffffffa00b5000
JIT code: ffffffffa00b5000: 55 48 89 e5 48 83 ec 60 48 89 5d f8 44 8b 4f 60
JIT code: ffffffffa00b5010: 44 2b 4f 64 4c 8b 87 b8 00 00 00 be 0c 00 00 00
JIT code: ffffffffa00b5020: e8 24 7b f7 e0 3d 00 08 00 00 75 28 be 1a 00 00
JIT code: ffffffffa00b5030: 00 e8 fe 7a f7 e0 24 00 3d 00 14 a8 c0 74 49 be
JIT code: ffffffffa00b5040: 1e 00 00 00 e8 eb 7a f7 e0 24 00 3d 00 14 a8 c0
JIT code: ffffffffa00b5050: 74 36 eb 3b 3d 06 08 00 00 74 07 3d 35 80 00 00
JIT code: ffffffffa00b5060: 75 2d be 1c 00 00 00 e8 c8 7a f7 e0 24 00 3d 00
JIT code: ffffffffa00b5070: 14 a8 c0 74 13 be 26 00 00 00 e8 b5 7a f7 e0 24
JIT code: ffffffffa00b5080: 00 3d 00 14 a8 c0 75 07 b8 ff ff 00 00 eb 02 31
JIT code: ffffffffa00b5090: c0 c9 c3BPF program is 144 bytes long, so native program is almost same size ;)
(000) ldh [12]
(001) jeq #0x800 jt 2 jf 8
(002) ld [26]
(003) and #0xffffff00
(004) jeq #0xc0a81400 jt 16 jf 5
(005) ld [30]
(006) and #0xffffff00
(007) jeq #0xc0a81400 jt 16 jf 17
(008) jeq #0x806 jt 10 jf 9
(009) jeq #0x8035 jt 10 jf 17
(010) ld [28]
(011) and #0xffffff00
(012) jeq #0xc0a81400 jt 16 jf 13
(013) ld [38]
(014) and #0xffffff00
(015) jeq #0xc0a81400 jt 16 jf 17
(016) ret #65535
(017) ret #0Signed-off-by: Eric Dumazet
Cc: Arnaldo Carvalho de Melo
Cc: Ben Hutchings
Cc: Hagen Paul Pfeifer
Signed-off-by: David S. Miller
22 Apr, 2011
1 commit
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mac-fec.c was setting individual UDP address registers instead of multicast
group address registers when joining a multicast group.
This prevented from correctly receiving UDP multicast packets.
According to datasheet, replaced hash_table_high and hash_table_low
with grp_hash_table_high and grp_hash_table_low respectively.
Also renamed hash_table_* with grp_hash_table_* in struct fec declaration
for 8xx: these registers are used only for multicast there.Tested on a MPC5121 based board.
Build tested also against mpc866_ads_defconfig.Signed-off-by: Andrea Galbusera
Signed-off-by: David S. Miller
08 Apr, 2011
7 commits
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* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] compile fix for latest binutils
[S390] cio: prevent purging of CCW devices in the online state
[S390] qdio: fix init sequence
[S390] Fix parameter passing for smp_switch_to_cpu()
[S390] oprofile s390: prevent stack corruption -
…l/git/lethal/fbdev-2.6
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
efifb: Add override for 11" Macbook Air 3,1
efifb: Support overriding fields FW tells us with the DMI data.
fb: Reduce priority of resource conflict message
savagefb: Remove obsolete else clause in savage_setup_i2c_bus
savagefb: Set up I2C based on chip family instead of card id
savagefb: Replace magic register address with define
drivers/video/bfin-lq035q1-fb.c: introduce missing kfree
video: s3c-fb: fix checkpatch errors and warning
efifb: support AMD Radeon HD 6490
s3fb: fix Virge/GX2
fbcon: Remove unused 'display *p' variable from fb_flashcursor()
fbdev: sh_mobile_lcdcfb: fix module lock acquisition
fbdev: sh_mobile_lcdcfb: add blanking support
viafb: initialize margins correct
viafb: refresh rate bug collection
sh: mach-ap325rxa: move backlight control code
sh: mach-ecovec24: support for main lcd backlight -
…nel/git/lethal/sh-2.6
* 'rmobile-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
ARM: arch-shmobile: only run FSI init on respective boards
ARM: arch-shmobile: only run HDMI init on respective boards
ARM: mach-shmobile: Correctly check for CONFIG_MACH_MACKEREL -
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: select ARCH_NO_SYSDEV_OPS.
sh: fix build error in board-sh7757lcr.c
sh: landisk: Remove whitespace
sh: landisk: Remove mv_nr_irqs
sh: sh-sci: Fix double initialization by serial_console_setup
serial: sh-sci: prevent setup of uninitialized serial console
dma: shdma: add checking the DMAOR_AE in sh_dmae_err -
…-linus', 'irq-fixes-for-linus' and 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/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:
x86-32, fpu: Fix FPU exception handling on non-SSE systems
x86, hibernate: Initialize mmu_cr4_features during boot
x86-32, NUMA: Fix ACPI NUMA init broken by recent x86-64 change
x86: visws: Fixup irq overhaul fallout* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Clean up rebalance_domains() load-balance interval calculation* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86/mrst/vrtc: Fix boot crash in mrst_rtc_init()
rtc, x86/mrst/vrtc: Fix boot crash in rtc_read_alarm()* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Fix cpumask leak in __setup_irq()* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf probe: Fix listing incorrect line number with inline function
perf probe: Fix to find recursively inlined function
perf probe: Fix multiple --vars options behavior
perf probe: Fix to remove redundant close
perf probe: Fix to ensure function declared file -
* 'kvm-updates/2.6.39' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: move and fix substitue search for missing CPUID entries
KVM: fix XSAVE bit scanning
KVM: Enable async page fault processing
KVM: fix crash on irqfd deassign -
* 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6:
Fix common misspellings
07 Apr, 2011
7 commits
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The sfi_mrtc_array[] only gets initialized when the sfi mrtc
table is parsed, so the vrtc_paddr should be initalized after it
too.Signed-off-by: Feng Tang
Signed-off-by: Alan Cox
Cc: Linus Torvalds
Link: http://lkml.kernel.org/r/1302140389-27603-1-git-send-email-feng.tang@intel.com
Signed-off-by: Ingo Molnar -
On 32bit systems without SSE (that is, they use FSAVE/FRSTOR for FPU
context switches), FPU exceptions in user mode cause Oopses, BUGs,
recursive faults and other nasty things:fpu exception: 0000 [#1]
last sysfs file: /sys/power/state
Modules linked in: psmouse evdev pcspkr serio_raw [last unloaded: scsi_wait_scan]Pid: 1638, comm: fxsave-32-excep Not tainted 2.6.35-07798-g58a992b-dirty #633 VP3-596B-DD/VT82C597
EIP: 0060:[] EFLAGS: 00010202 CPU: 0
EIP is at math_error+0x1b4/0x1c8
EAX: 00000003 EBX: cf9be7e0 ECX: 00000000 EDX: cf9c5c00
ESI: cf9d9fb4 EDI: c1372db3 EBP: 00000010 ESP: cf9d9f1c
DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
Process fxsave-32-excep (pid: 1638, ti=cf9d8000 task=cf9be7e0 task.ti=cf9d8000)
Stack:
00000000 00000301 00000004 00000000 00000000 cf9d3000 cf9da8f0 00000001
00000004 cf9b6b60 c1019a6b c1019a79 00000020 00000242 000001b6 cf9c5380
cf806b40 cf791880 00000000 00000282 00000282 c108a213 00000020 cf9c5380
Call Trace:
[] ? need_resched+0x11/0x1a
[] ? should_resched+0x5/0x1f
[] ? do_sys_open+0xbd/0xc7
[] ? do_sys_open+0xbd/0xc7
[] ? do_coprocessor_error+0x0/0x11
[] ? error_code+0x65/0x70
Code: a8 20 74 30 c7 44 24 0c 06 00 03 00 8d 54 24 04 89 d9 b8 08 00 00 00 e8 9b 6d 02 00 eb 16 8b 93 5c 02 00 00 eb 05 e9 04 ff ff ff dd 32 9b e9 16 ff ff ff 81 c4 84 00 00 00 5b 5e 5f 5d c3 c6
EIP: [] math_error+0x1b4/0x1c8 SS:ESP 0068:cf9d9f1cThis usually continues in slight variations until the system is reset.
This bug was introduced by commit 58a992b9cbaf449aeebd3575c3695a9eb5d95b5e:
x86-32, fpu: Rewrite fpu_save_init()Signed-off-by: Hans Rosenfeld
Link: http://lkml.kernel.org/r/1302106003-366952-1-git-send-email-hans.rosenfeld@amd.com
Signed-off-by: H. Peter Anvin -
Restore the initialization of mmu_cr4_features during boot, which was
removed without comment in checkin e5f15b45ddf3afa2bbbb10c7ea34fb32b6de0a0ex86: Cleanup highmap after brk is concluded
thereby breaking resume from hibernate. This restores previous
functionality in approximately the same place, and corrects the
reading of %cr4 on pre-CPUID hardware (%cr4 exists if and only if
CPUID is supported.)However, part of the problem is that the hibernate suspend/resume
sequence should manage the save/restore of %cr4 explicitly.Signed-off-by: H. Peter Anvin
Cc: Rafael J. Wysocki
Cc: Stefano Stabellini
Cc: Yinghai Lu
LKML-Reference: -
Now that everything that was using these interfaces has been converted to
the syscore ops, prevent new code from using the old API.Signed-off-by: Paul Mundt
-
If several boards are enabled in the kernel configuration,
fsi_init_pm_clock() functions from board-ap4evb.c
will run on any of them. Prevent this by calling these functions from the
.init_machine() callback instead of using device_initcall().Signed-off-by: Kuninori Morimoto
Cc: Magnus Damm
Signed-off-by: Paul Mundt -
If several boards are enabled in the kernel configuration,
hdmi_init_pm_clock() functions from board-ap4evb.c and board-mackerel.c
will run on any of them. Prevent this by calling these functions from the
.init_machine() callback instead of using device_initcall().Signed-off-by: Guennadi Liakhovetski
Cc: Magnus Damm
Tested-by: Kuninori Morimoto
Signed-off-by: Paul Mundt -
I made a bit of a thinko when adding Mackerel to the boards
that support zboot using MMCIF.Reported-by: Magnus Damm
Signed-off-by: Simon Horman
Signed-off-by: Paul Mundt
06 Apr, 2011
2 commits
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If KVM cannot find an exact match for a requested CPUID leaf, the
code will try to find the closest match instead of simply confessing
it's failure.
The implementation was meant to satisfy the CPUID specification, but
did not properly check for extended and standard leaves and also
didn't account for the index subleaf.
Beside that this rule only applies to CPUID intercepts, which is not
the only user of the kvm_find_cpuid_entry() function.So fix this algorithm and call it from kvm_emulate_cpuid().
This fixes a crash of newer Linux kernels as KVM guests on
AMD Bulldozer CPUs, where bogus values were returned in response to
a CPUID intercept.Signed-off-by: Andre Przywara
Signed-off-by: Avi Kivity -
When KVM scans the 0xD CPUID leaf for propagating the XSAVE save area
leaves, it assumes that the leaves are contigious and stops at the
first zero one. On AMD hardware there is a gap, though, as LWP uses
leaf 62 to announce it's state save area.
So lets iterate through all 64 possible leaves and simply skip zero
ones to also cover later features.Signed-off-by: Andre Przywara
Signed-off-by: Avi Kivity
05 Apr, 2011
7 commits
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Signed-off-by: Matt Evans
Signed-off-by: Benjamin Herrenschmidt -
Without this, "holes" in the CPU numbering can cause us to
free too many PACAsSigned-off-by: Benjamin Herrenschmidt
-
Signed-off-by: Benjamin Herrenschmidt
-
Commit b3df895aebe091b1657 "powerpc/kexec: Add support for FSL-BookE"
introduced the original PPC_STD_MMU_64 checks around the function
crash_kexec_wait_realmode(). Then commit c2be05481f61252
"powerpc: Fix default_machine_crash_shutdown #ifdef botch" changed
the ifdef around the calling site to add a check on SMP, but the
ifdef around the function itself was left unchanged, leaving an
unused function for PPC_STD_MMU_64=y and SMP=nRather than have two ifdefs that can get out of sync like this,
simply put the corrected conditional around the function and use
a stub to get rid of one set of ifdefs completely.Signed-off-by: Paul Gortmaker
Signed-off-by: Benjamin Herrenschmidt -
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
microblaze: Fix ftrace
microblaze: Wire up new syscalls
microblaze: Fix level/edge irq sensibility -
Fix some minor typos:
* informations => information
* there own => their own
* these => thisSigned-off-by: Sylvestre Ledru
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
04 Apr, 2011
10 commits
-
…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, UV: Fix kdump reboot
x86, amd-nb: Rename CPU PCI id define for F4
sound: Add delay.h to sound/soc/codecs/sn95031.c
x86, mtrr, pat: Fix one cpu getting out of sync during resume
x86, microcode: Unregister syscore_ops after microcode unloaded
x86: Stop including <linux/delay.h> in two asm header files -
…/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: Fix task_struct reference leak
perf: Fix task context scheduling
perf: mmap 512 kiB by default
perf: Rebase max unprivileged mlock threshold on top of page size
perf tools: Fix NO_NEWT=1 python build error
perf symbols: Properly align symbol_conf.priv_size
perf tools: Emit clearer message for sys_perf_event_open ENOENT return
perf tools: Fixup exit path when not able to open events
perf symbols: Fix vsyscall symbol lookup
oprofile, x86: Allow setting EDGE/INV/CMASK for counter events -
…/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
rcu: create new rcu_access_index() and use in mce
WARN_ON_SMP(): Add comment to explain ({0;}) -
* 'unicore32' of git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32:
unicore32 framebuffer fix: get videomemory by __get_free_pages() and make it floatable
unicore32 core architecture: remove duplicated #include
unicore32 rtc driver fix: cleanup irq_set_freq and irq_set_state
unicore32 fix: remove arch-specific futex support
unicore32 ldscript fix: add cacheline parameter to PERCPU() macro -
Commit d8fc3afc49 (x86, NUMA: Move *_numa_init() invocations
into initmem_init()) moved acpi_numa_init() call into NUMA
initmem_init() but forgot to update 32bit NUMA init breaking ACPI
NUMA configuration for 32bit.acpi_numa_init() call was later moved again to srat_64.c. Match
it by adding the call to get_memcfg_from_srat() in srat_32.c.Signed-off-by: Tejun Heo
Cc: Yinghai Lu
Cc: Cyrill Gorcunov
Cc: David Rientjes
Cc: H. Peter Anvin
LKML-Reference:
Signed-off-by: Ingo Molnar -
Reported-by: Ian Campbell
Signed-off-by: Thomas Gleixner -
PCIe memory address space is 1:1 mapped with u-boot.
Update dts of Px020RDB i.e. P1020RDB and P2020RDB to match the address map
changes in u-boot.Signed-off-by: Prabhakar Kushwaha
Signed-off-by: Kumar Gala -
The latest binutils won't accept the stfl instruction with march=g5
which is the correct behaviour. Unfortunately head.S is assembled
with -march=g5 even if the target cpu is z900 or later. To get
31-bit kernels compiled again the easiest fix is to use the .insn
notation for the stfl instruction in head.S.Signed-off-by: Martin Schwidefsky
-
After the execution has been switched to the destination CPU, the target
function is called with the wrong parameter. According to the C calling
convention on s390, the first parameter should be loaded into register 2.
Currently in smp_restart_cpu() it is stored in register 3. To fix this, we
load the parameter into the correct register 2.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky -
Prevent stack corruption by memcpy which copies more bytes then
available at the destination. While at it use the new test_facility
to test for the facility bit.Signed-off-by: Jan Glauber
Signed-off-by: Martin Schwidefsky
02 Apr, 2011
2 commits
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1. get videomemory by __get_free_pages() in fb-puv3.c
2. remove resource reservation for old fixed UNIGFX_MMAP & UVC_MMAP space
3. remove unused macros: PKUNTIY_UNIGFX_MMAP_BASE, PKUNITY_UNIGFX_MMAP_SIZE,
PKUNITY_UVC_MMAP_BASE, PKUNITY_UVC_MMAP_SIZE and KUSER_UNIGFX_BASE
4. remove unused header linux/vmalloc.h in fb-puv3.hSigned-off-by: Guan Xuetao
Acked-by: Arnd Bergmann -
Remove duplicated #include('s) in
arch/unicore32/kernel/traps.cSigned-off-by: Huang Weiyi
Acked-by: Guan Xuetao
