linux_old1/arch/i386
Andrew Morton f79e2abb9b [PATCH] sys_sync_file_range()
Remove the recently-added LINUX_FADV_ASYNC_WRITE and LINUX_FADV_WRITE_WAIT
fadvise() additions, do it in a new sys_sync_file_range() syscall instead.
Reasons:

- It's more flexible.  Things which would require two or three syscalls with
  fadvise() can be done in a single syscall.

- Using fadvise() in this manner is something not covered by POSIX.

The patch wires up the syscall for x86.

The sycall is implemented in the new fs/sync.c.  The intention is that we can
move sys_fsync(), sys_fdatasync() and perhaps sys_sync() into there later.

Documentation for the syscall is in fs/sync.c.

A test app (sync_file_range.c) is in
http://www.zip.com.au/~akpm/linux/patches/stuff/ext3-tools.tar.gz.

The available-to-GPL-modules do_sync_file_range() is for knfsd: "A COMMIT can
say NFS_DATA_SYNC or NFS_FILE_SYNC.  I can skip the ->fsync call for
NFS_DATA_SYNC which is hopefully the more common."

Note: the `async' writeout mode SYNC_FILE_RANGE_WRITE will turn synchronous if
the queue is congested.  This is trivial to fix: add a new flag bit, set
wbc->nonblocking.  But I'm not sure that we want to expose implementation
details down to that level.

Note: it's notable that we can sync an fd which wasn't opened for writing.
Same with fsync() and fdatasync()).

Note: the code takes some care to handle attempts to sync file contents
outside the 16TB offset on 32-bit machines.  It makes such attempts appear to
succeed, for best 32-bit/64-bit compatibility.  Perhaps it should make such
requests fail...

Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Cc: Ulrich Drepper <drepper@redhat.com>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:18:54 -08:00
..
boot [PATCH] fbdev: Make BIOS EDID reading configurable 2006-03-27 08:44:55 -08:00
crypto [CRYPTO] aes-i586: Remove unused variable ls_tab 2006-01-09 14:15:53 -08:00
kernel [PATCH] sys_sync_file_range() 2006-03-31 12:18:54 -08:00
lib [LIB]: Consolidate _atomic_dec_and_lock() 2005-09-14 21:47:01 -07:00
mach-default [PATCH] Fix topology.c location 2006-02-24 14:31:39 -08:00
mach-es7000 [PATCH] Compilation fix for ES7000 when no ACPI is specified in config (i386) 2006-03-23 07:38:04 -08:00
mach-generic [PATCH] x86: sutomatically enable bigsmp when we have more than 8 CPUs 2005-09-05 00:06:10 -07:00
mach-visws [PATCH] kill include/linux/platform.h, default_idle() cleanup 2006-03-24 07:33:21 -08:00
mach-voyager [PATCH] for_each_possible_cpu: i386 2006-03-28 09:16:05 -08:00
math-emu [PATCH] i386: inline assembler: cleanup and encapsulate descriptor and task register management 2005-09-05 00:06:11 -07:00
mm [PATCH] unify PFN_* macros 2006-03-27 08:44:48 -08:00
oprofile [PATCH] for_each_possible_cpu: i386 2006-03-28 09:16:05 -08:00
pci [PATCH] PCI: PCI/Cardbus cards hidden, needs pci=assign-busses to fix 2006-03-23 14:35:14 -08:00
power [PATCH] x86: add MCE resume 2005-11-07 07:53:30 -08:00
Kconfig [PATCH] sched: new sched domain for representing multi-core 2006-03-27 08:44:43 -08:00
Kconfig.cpu [PATCH] Base support for AMD Geode GX/LX processors 2006-01-06 08:33:38 -08:00
Kconfig.debug [PATCH] kconfig: clarify memory debug options 2006-03-25 08:22:54 -08:00
Makefile [PATCH] x86: "make isoimage" support; FDINITRD= support; minor cleanups 2006-03-26 08:56:53 -08:00
Makefile.cpu [PATCH] x86-64: Use -mtune=generic for generic kernels 2006-03-25 09:10:52 -08:00
defconfig update the i386 defconfig 2006-03-20 20:14:06 +01:00