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Amit Arora 97ac73506c sys_fallocate() implementation on i386, x86_64 and powerpc 
fallocate() is a new system call being proposed here which will allow
applications to preallocate space to any file(s) in a file system.
Each file system implementation that wants to use this feature will need
to support an inode operation called ->fallocate().
Applications can use this feature to avoid fragmentation to certain
level and thus get faster access speed. With preallocation, applications
also get a guarantee of space for particular file(s) - even if later the
the system becomes full.

Currently, glibc provides an interface called posix_fallocate() which
can be used for similar cause. Though this has the advantage of working
on all file systems, but it is quite slow (since it writes zeroes to
each block that has to be preallocated). Without a doubt, file systems
can do this more efficiently within the kernel, by implementing
the proposed fallocate() system call. It is expected that
posix_fallocate() will be modified to call this new system call first
and incase the kernel/filesystem does not implement it, it should fall
back to the current implementation of writing zeroes to the new blocks.
ToDos:
1. Implementation on other architectures (other than i386, x86_64,
   and ppc). Patches for s390(x) and ia64 are already available from
   previous posts, but it was decided that they should be added later
   once fallocate is in the mainline. Hence not including those patches
   in this take.
2. Changes to glibc,
   a) to support fallocate() system call
   b) to make posix_fallocate() and posix_fallocate64() call fallocate()

Signed-off-by: Amit Arora <aarora@in.ibm.com>
2007-07-17 21:42:44 -04:00
..
8253pit.h
a.out.h
acpi.h ACPICA: Allow ACPI id to be u32 instead of u8. 2007-02-02 21:14:31 -05:00
agp.h [AGPGART] Move [un]map_page_into_agp into asm/agp.h 2007-04-26 14:22:50 -04:00
alternative-asm.i
alternative.h Unify the CPU features vectors between i386 and x86-64 2007-07-12 10:55:54 -07:00
apic.h [PATCH] x86-64: safe_apic_wait_icr_idle - x86_64 2007-05-02 19:27:17 +02:00
apicdef.h
atomic.h x86: create asm/cmpxchg.h 2007-05-08 11:15:20 -07:00
auxvec.h
bitops.h [PATCH] x86-64: Fix wrong gcc check in bitops.h 2007-02-13 13:26:25 +01:00
boot.h Make struct boot_params a real structure, and remove obsolete fields 2007-07-12 10:55:54 -07:00
bootparam.h Make struct boot_params a real structure, and remove obsolete fields 2007-07-12 10:55:54 -07:00
bootsetup.h [PATCH] Dynamic kernel command-line: x86_64 2007-02-12 09:48:39 -08:00
bug.h [PATCH] Generic BUG for x86-64 2006-12-08 08:28:39 -08:00
bugs.h [PATCH] x86-64: Clean up asm-x86_64/bugs.h 2007-05-02 19:27:12 +02:00
byteorder.h
cache.h
cacheflush.h [PATCH] Optimize D-cache alias handling on fork 2006-12-13 09:27:08 -08:00
calgary.h Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
calling.h
checksum.h [NET]: X86_64 checksum annotations and cleanups. 2006-12-02 21:23:14 -08:00
cmpxchg.h x86: create asm/cmpxchg.h 2007-05-08 11:15:20 -07:00
compat.h Introduce compat_u64 and compat_s64 types 2007-07-16 09:05:48 -07:00
cpu.h
cpufeature.h Unify the CPU features vectors between i386 and x86-64 2007-07-12 10:55:54 -07:00
cputime.h
current.h
debugreg.h
delay.h [PATCH] x86: comment magic constants in delay.h 2006-12-07 02:14:07 +01:00
desc_defs.h [PATCH] x86-64: Extract segment descriptor definitions for use outside 2006-12-07 02:14:04 +01:00
desc.h [PATCH] x86-64: Introduce load_TLS to the "for" loop. 2007-05-02 19:27:09 +02:00
device.h ACPI: Change ACPI to use dev_archdata instead of firmware_data 2006-12-01 14:52:01 -08:00
div64.h
dma-mapping.h [PATCH] x86-64: dma_ops as const 2007-05-02 19:27:06 +02:00
dma.h
dmi.h
dwarf2.h
e820.h Make definitions for struct e820entry and struct e820map consistent 2007-07-12 10:55:54 -07:00
edac.h
elf.h [PATCH] severing module.h->sched.h 2006-12-04 02:00:22 -05:00
emergency-restart.h
errno.h
fb.h fbdev: detect primary display device 2007-07-17 10:23:11 -07:00
fcntl.h
fixmap.h serial: convert early_uart to earlycon for 8250 2007-07-16 09:05:35 -07:00
floppy.h
fpu32.h
futex.h [PATCH] mm: pagefault_{disable,enable}() 2006-12-07 08:39:21 -08:00
genapic.h [PATCH] x86-64: always use physical delivery mode on > 8 CPUs 2007-05-02 19:27:04 +02:00
hardirq.h
hpet.h [PATCH] time: x86_64: split x86_64/kernel/time.c up 2007-02-16 08:14:00 -08:00
hw_irq.h [PATCH] x86_64 irq: Fix comments after changing IRQ0_VECTOR from 0x20 to 0x30 2007-03-29 08:16:23 -07:00
hypertransport.h
i387.h
ia32_unistd.h
ia32.h
ide.h
idle.h
intel_arch_perfmon.h
io_apic.h [PATCH] io_apic.h needs apicdef.h 2007-03-05 07:57:50 -08:00
io.h serial: convert early_uart to earlycon for 8250 2007-07-16 09:05:35 -07:00
ioctl.h
ioctls.h [PATCH] termios: Enable new style termios ioctls on x86-64 2006-12-08 08:28:57 -08:00
ipcbuf.h
ipi.h [PATCH] x86-64: Use safe_apic_wait_icr_idle in __send_IPI_dest_field - x86_64 2007-05-02 19:27:18 +02:00
irq_regs.h
irq.h
irqflags.h [PATCH] x86-64: Use X86_EFLAGS_IF in x86-64/irqflags.h. 2007-05-02 19:27:11 +02:00
k8.h
Kbuild consolidate asm/const.h to linux/const.h 2007-05-08 11:15:13 -07:00
kdebug.h Revert "ipmi: add new IPMI nmi watchdog handling" 2007-05-14 15:24:24 -07:00
kexec.h kdump/kexec: calculate note size at compile time 2007-05-08 11:15:07 -07:00
kmap_types.h
kprobes.h
ldt.h
linkage.h
local.h local_t: x86_64 extension 2007-05-08 11:15:20 -07:00
mach_apic.h
mc146818rtc.h
mce.h [PATCH] x86-64: Allow to run a program when a machine check event is detected 2007-02-13 13:26:23 +01:00
mman.h
mmsegment.h
mmu_context.h [PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destruction 2007-05-02 19:27:14 +02:00
mmu.h
mmzone.h [PATCH] x86-64: configurable fake numa node sizes 2007-05-02 19:27:09 +02:00
module.h
mpspec.h
msgbuf.h
msidef.h
msr-index.h [PATCH] x86: Clean up x86 control register and MSR macros (corrected) 2007-05-02 19:27:12 +02:00
msr.h i386: Add safe variants of rdmsr_on_cpu and wrmsr_on_cpu 2007-05-08 17:22:01 +02:00
mtrr.h [PATCH] x86: Save the MTRRs of the BSP before booting an AP 2007-05-02 19:27:17 +02:00
mutex.h [PATCH] x86-64: Remove fastcall references in x86_64 code 2007-02-13 13:26:22 +01:00
namei.h
nmi.h [PATCH] x86-64: Use the 32bit wd_ops for 64bit too. 2007-05-02 19:27:20 +02:00
node.h
numa.h
page.h Add __GFP_MOVABLE for callers to flag allocations from high memory that may be migrated 2007-07-17 10:22:59 -07:00
param.h
parport.h
pci-direct.h [PATCH] x86: add write_pci_config_byte() to direct PCI access routines 2006-12-07 02:14:10 +01:00
pci.h PCI: remove pci_dac_dma_... APIs 2007-07-11 16:02:11 -07:00
pda.h [PATCH] x86-64: Fix race in exit_idle 2006-11-14 16:57:46 +01:00
percpu.h [PATCH] x86-64: Account for module percpu space separately from kernel percpu 2007-05-02 19:27:11 +02:00
pgalloc.h [PATCH] x86-64: use lru instead of page->index and page->private for pgd lists management. 2007-05-02 19:27:10 +02:00
pgtable.h mm: remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty 2007-07-17 10:22:59 -07:00
poll.h Consolidate asm/poll.h 2007-05-11 08:29:34 -07:00
posix_types.h
prctl.h
processor-flags.h [PATCH] x86: Clean up x86 control register and MSR macros (corrected) 2007-05-02 19:27:12 +02:00
processor.h Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
proto.h [PATCH] x86-64: Move mtrr prototypes from proto.h to mtrr.h 2007-05-02 19:27:17 +02:00
ptrace-abi.h
ptrace.h
required-features.h Use a new CPU feature word to cover features that are spread around 2007-07-12 10:55:54 -07:00
resource.h
rio.h [PATCH] Calgary: check BBAR ioremap success when ioremapping 2006-12-07 02:14:06 +01:00
rtc.h
rwlock.h
scatterlist.h PCI: scatterlist.h needs types.h 2007-05-02 19:02:34 -07:00
seccomp.h
sections.h
segment.h x86-64: add symbolic constants for the boot segment selectors 2007-07-12 10:55:54 -07:00
semaphore.h
sembuf.h
serial.h x86, serial: convert legacy COM ports to platform devices 2007-05-08 11:15:23 -07:00
setup.h [PATCH] x86_64: 2048-byte command line 2007-02-12 09:48:39 -08:00
shmbuf.h
shmparam.h
sigcontext32.h
sigcontext.h
siginfo.h
signal.h
smp.h Use the APIC to determine the hardware processor id - x86_64 2007-05-09 12:30:48 -07:00
socket.h [NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support 2007-04-25 22:24:21 -07:00
sockios.h [NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution 2007-04-25 22:24:04 -07:00
sparsemem.h
spinlock_types.h [PATCH] Remove 'volatile' from spinlock_types 2006-12-06 14:39:53 -08:00
spinlock.h [PATCH] x86-64: Don't keep interrupts disabled while spinning in spinlocks 2006-12-07 02:14:00 +01:00
stacktrace.h [PATCH] x86: add sysctl for kstack_depth_to_print 2006-12-07 02:14:11 +01:00
stat.h
statfs.h
string.h
suspend.h [PATCH] x86-64: wakeup.S rename registers to reflect right names 2007-05-02 19:27:07 +02:00
swiotlb.h Revert "[IA64] swiotlb abstraction (e.g. for Xen)" 2007-03-06 13:31:45 -08:00
system.h rename thread_info to stack 2007-05-09 12:30:56 -07:00
tce.h
termbits.h tty: i386/x86_64 arbitary speed support 2007-05-08 11:15:03 -07:00
termios.h [PATCH] consolidate line discipline number definitions 2007-02-11 10:51:26 -08:00
therm_throt.h
thread_info.h wrap access to thread_info 2007-05-09 12:30:56 -07:00
timex.h [PATCH] x86: Log reason why TSC was marked unstable 2007-05-02 19:27:08 +02:00
tlb.h
tlbflush.h Detach sched.h from mm.h 2007-05-21 09:18:19 -07:00
topology.h [PATCH] sched: remove SMT nice 2007-03-05 07:57:51 -08:00
tsc.h [PATCH] i386: make x86_64 tsc header require i386 rather than vice-versa 2007-03-06 09:30:24 -08:00
types.h [PATCH] Centralise definitions of sector_t and blkcnt_t 2006-12-04 19:41:15 -08:00
uaccess.h [PATCH] kill bogus casts in amd64 uaccess.h 2007-03-14 15:27:50 -07:00
ucontext.h
unaligned.h
unistd.h sys_fallocate() implementation on i386, x86_64 and powerpc 2007-07-17 21:42:44 -04:00
unwind.h Remove stack unwinder for now 2006-12-15 08:47:51 -08:00
user32.h
user.h
vga.h
vsyscall32.h
vsyscall.h [PATCH] time: x86_64: re-enable vsyscall support for x86_64 2007-02-16 08:14:00 -08:00
xor.h