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Arnaldo Carvalho de Melo a2e2725541 net: Introduce recvmmsg socket syscall 
Meaning receive multiple messages, reducing the number of syscalls and
net stack entry/exit operations.

Next patches will introduce mechanisms where protocols that want to
optimize this operation will provide an unlocked_recvmsg operation.

This takes into account comments made by:

. Paul Moore: sock_recvmsg is called only for the first datagram,
  sock_recvmsg_nosec is used for the rest.

. Caitlin Bestler: recvmmsg now has a struct timespec timeout, that
  works in the same fashion as the ppoll one.

  If the underlying protocol returns a datagram with MSG_OOB set, this
  will make recvmmsg return right away with as many datagrams (+ the OOB
  one) it has received so far.

. Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen
  datagrams and then recvmsg returns an error, recvmmsg will return
  the successfully received datagrams, store the error and return it
  in the next call.

This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg,
where we will be able to acquire the lock only at batch start and end, not at
every underlying recvmsg call.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2009-10-12 23:40:10 -07:00
..
.gitignore
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Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next 2009-09-23 15:37:02 -07:00
apc.c
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asm-offsets.c
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audit.c
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auxio_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
auxio_64.c sparc64: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:20 -08:00
central.c sparc64: Initialize FHC/CLOCK LED platform_device 'id' field correctly. 2009-01-19 13:27:15 -08:00
cherrs.S
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chmc.c sparc64: Fix crashes in jbusmc_print_dimm() 2009-02-11 00:54:07 -08:00
compat_audit.c
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cpu.c sparc,leon: Introduce the sparc-leon CPU type. 2009-08-17 18:32:10 -07:00
cpumap.c sparc64: fix and optimize irq distribution 2009-06-16 04:56:28 -07:00
cpumap.h sparc64: fix and optimize irq distribution 2009-06-16 04:56:28 -07:00
devices.c
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dma.c sparc: Add CONFIG_DMA_API_DEBUG support 2009-08-10 09:35:00 +02:00
ds.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
dtlb_miss.S
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dtlb_prot.S
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ebus.c
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entry.S [CVE-2009-0029] Remove __attribute__((weak)) from sys_pipe/sys_pipe2 2009-01-14 14:15:15 +01:00
entry.h
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etrap_32.S
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etrap_64.S
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fpu_traps.S
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ftrace.c sparc64: Add proper dynamic ftrace support. 2009-06-16 04:56:53 -07:00
getsetcc.S
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head_32.S sparc,leon: Introduce the sparc-leon CPU type. 2009-08-17 18:32:10 -07:00
head_64.S sparc64: Store per-cpu offset in trap_block[] 2009-06-16 04:56:11 -07:00
helpers.S
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hvapi.c
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hvcalls.S
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hvtramp.S
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idprom.c sparc,leon: Introduce the sparc-leon CPU type. 2009-08-17 18:32:10 -07:00
init_task.c Use new __init_task_data macro in arch init_task.c files. 2009-09-21 06:27:08 +02:00
iommu.c sparc: Use asm-generic/pci-dma-compat 2009-08-10 09:35:00 +02:00
iommu_common.h
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ioport.c Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ 2009-09-11 20:35:13 -07:00
irq.h
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irq_32.c sparc,leon: Introduce the sparc-leon CPU type. 2009-08-17 18:32:10 -07:00
irq_64.c trivial: remove unnecessary semicolons 2009-09-21 15:14:58 +02:00
itlb_miss.S
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ivec.S
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kernel.h sparc: Probe PMU type and record in sparc_pmu_type. 2009-01-28 17:27:14 -08:00
kgdb_32.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
kgdb_64.c sparc64: Reschedule KGDB capture to a software interrupt. 2009-03-18 23:51:57 -07:00
kprobes.c trivial: fix then -> than typos in comments and documentation 2009-01-06 11:28:06 +01:00
kstack.h
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ktlb.S sparc64: Validate linear D-TLB misses. 2009-08-25 16:47:46 -07:00
ldc.c sparc: remove some pointless conditionals before kfree() 2009-04-15 03:04:56 -07:00
led.c proc 2/2: remove struct proc_dir_entry::owner 2009-03-31 01:14:44 +04:00
leon_kernel.c sparc,leon: CONFIG_SPARC_LEON option and leon specific files. 2009-08-17 18:32:09 -07:00
mdesc.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
misctrap.S
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module.c module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
muldiv.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
nmi.c perf: Do the big rename: Performance Counters -> Performance Events 2009-09-21 14:28:04 +02:00
of_device_32.c sparc,leon: Added support for AMBAPP bus. 2009-08-17 18:32:10 -07:00
of_device_64.c sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
of_device_common.c sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
of_device_common.h sparc: move of_device common code to of_device_common 2009-06-16 04:56:49 -07:00
pci.c sparc: Use asm-generic/pci-dma-compat 2009-08-10 09:35:00 +02:00
pci_common.c sparc64: Fix crash with /proc/iomem 2009-03-18 23:53:16 -07:00
pci_fire.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_impl.h
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pci_msi.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
pci_psycho.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_sabre.c sparc64: Fix section mismatch warnings in PCI controller drivers. 2009-04-08 03:28:15 -07:00
pci_schizo.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
pci_sun4v.c sparc: Remove no-op dma_4v_sync_single_for_cpu and dma_4v_sync_sg_for_cpu 2009-08-10 09:34:59 +02:00
pci_sun4v.h
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pci_sun4v_asm.S
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pcic.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
pcr.c perf: Do the big rename: Performance Counters -> Performance Events 2009-09-21 14:28:04 +02:00
perf_event.c perf: Do the big rename: Performance Counters -> Performance Events 2009-09-21 14:28:04 +02:00
pmc.c
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power.c sparc64: Fix section mismatch warnings in power driver. 2009-04-08 03:27:52 -07:00
process_32.c Simplify copy_thread() 2009-04-02 19:04:51 -07:00
process_64.c debug lockups: Improve lockup detection, fix generic arch fallback 2009-08-03 09:56:52 +02:00
prom.h sparc: Call OF and MD cpu scanning explicitly from paging_init() 2009-06-16 04:56:19 -07:00
prom_32.c sparc,leon: Added support for AMBAPP bus. 2009-08-17 18:32:10 -07:00
prom_64.c sparc64: Defer cpu_data() setup until end of per-cpu data initialization. 2009-06-16 04:56:22 -07:00
prom_common.c sparc,leon: Added support for AMBAPP bus. 2009-08-17 18:32:10 -07:00
prom_irqtrans.c sparc64: Use unsigned long long for u64. 2009-01-06 13:19:28 -08:00
psycho_common.c sparc64: fix warnings in psycho_common after ull conversion 2009-01-08 11:37:19 -08:00
psycho_common.h
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ptrace_32.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
ptrace_64.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
reboot.c
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rtrap_32.S
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rtrap_64.S
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sbus.c sparc64: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:20 -08:00
setup_32.c sparc: Kill PROM console driver. 2009-09-15 17:04:38 -07:00
setup_64.c sparc: Kill PROM console driver. 2009-09-15 17:04:38 -07:00
signal32.c
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signal_32.c KEYS: Add a keyctl to install a process's session keyring on its parent [try #6] 2009-09-02 21:29:22 +10:00
signal_64.c KEYS: Add a keyctl to install a process's session keyring on its parent [try #6] 2009-09-02 21:29:22 +10:00
smp_32.c cpumask: use mm_cpumask() wrapper: sparc 2009-03-16 14:40:39 +10:30
smp_64.c sparc64: implement page mapping percpu first chunk allocator 2009-09-29 09:17:57 +09:00
sparc_ksyms_32.c sparc: Eliminate PROMLIB_INTERNAL as it does nothing 2009-01-08 16:59:01 -08:00
sparc_ksyms_64.c sparc64: Fix UP build failure. 2009-01-13 17:38:24 -08:00
spiterrs.S
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sstate.c
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stacktrace.c
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starfire.c
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sun4c_irq.c
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sun4d_irq.c cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
sun4d_smp.c sparc32: Kill trap table freeing code. 2009-08-18 23:44:08 -07:00
sun4m_irq.c
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sun4m_smp.c sparc32: Kill trap table freeing code. 2009-08-18 23:44:08 -07:00
sun4v_ivec.S
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sun4v_tlb_miss.S
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sys32.S Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2009-09-14 10:37:28 -07:00
sys_sparc32.c headers: utsname.h redux 2009-09-23 18:13:10 -07:00
sys_sparc_32.c
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sys_sparc_64.c sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() 2009-01-19 21:11:27 -08:00
syscalls.S sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx() 2009-01-19 21:11:27 -08:00
sysfs.c sparc64: cheaper asm/uaccess.h inclusion 2009-08-16 18:25:53 -07:00
systbls.h headers: utsname.h redux 2009-09-23 18:13:10 -07:00
systbls_32.S net: Introduce recvmmsg socket syscall 2009-10-12 23:40:10 -07:00
systbls_64.S net: Introduce recvmmsg socket syscall 2009-10-12 23:40:10 -07:00
tadpole.c
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tick14.c
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time_32.c sparc: move EXPORT_SYMBOL to the symbols definition 2009-01-08 16:58:05 -08:00
time_64.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
trampoline_32.S
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trampoline_64.S
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traps_32.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00
traps_64.c sparc64: Use BUILD_BUG_ON() in trap_init(). 2009-06-16 04:56:13 -07:00
tsb.S
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ttable.S sparc64: Reschedule KGDB capture to a software interrupt. 2009-03-18 23:51:57 -07:00
una_asm_32.S
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una_asm_64.S
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unaligned_32.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
unaligned_64.c sparc: Most unaligned_64.c tweaks for branch tracer warnings. 2009-01-08 16:52:36 -08:00
us2e_cpufreq.c
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us3_cpufreq.c
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utrap.S
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vio.c sparc: remove driver-core BUS_ID_SIZE 2009-07-12 13:02:09 -07:00
viohs.c sparc64: refactor code in viohs.c 2009-01-06 12:46:46 -08:00
visemul.c
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vmlinux.lds.S sparc: Clean up linker script using new linker script macros. 2009-09-18 13:57:18 -07:00
windows.c sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t 2009-01-02 19:32:59 -08:00
winfixup.S
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wof.S
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wuf.S
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