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dd801aa546
freebsd-skq/sys
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Martin Matuska dd801aa546 MFV r243013 and r243267: 
Import the zio nop-write improvement from Illumos. To reduce I/O,
nop-write omits overwriting data if the checksum (cryptographically
secure) of new data matches the checksum of existing data.
It also saves space if snapshots are in use.

It currently works only on datasets with enabled compression, disabled
deduplication and sha256 checksums.

IllumOS 13887:196932ec9e6a and 13888:7204b3392a58
3236 zio nop-write

References:
https://www.illumos.org/issues/3236

MFC after:	2 weeks
2012-11-25 16:32:07 +00:00
..
amd64 Move the declaration of vm_phys_paddr_to_vm_page() from vm/vm_page.h 2012-11-16 05:55:56 +00:00
arm Fix spelling. 2012-11-25 16:19:12 +00:00
boot Make FDT blob compatible with Raspberry Pi firmware. 2012-11-23 03:24:52 +00:00
bsm Add the wait6(2) system call. It takes POSIX waitid()-like process 2012-11-13 12:52:31 +00:00
cam Use information about suported diagnostic pages to avoid reading optional 2012-11-07 23:12:53 +00:00
cddl MFV r243013 and r243267: 2012-11-25 16:32:07 +00:00
compat MFS security patches which seem to have accidentally not reached HEAD: 2012-11-23 01:48:31 +00:00
conf o) Add support for specifying a model of Octeon to target at compile-time, 2012-11-24 02:00:29 +00:00
contrib o) Have the FreeBSD kernel option "INVARIANTS" trickle down into the Simple 2012-11-24 02:55:05 +00:00
crypto Revert previous commit... 2012-10-10 08:36:38 +00:00
ddb Small textdump enhancements. 2012-11-01 04:07:08 +00:00
dev Add a comment which covers what's going on with the 64 bit TSF write. 2012-11-24 02:41:18 +00:00
fs - Remove reset of vpp pointer in some places as long as it's not really 2012-11-22 09:13:45 +00:00
gdb
geom - Don't pass geom and provider names as format strings. 2012-11-20 12:32:18 +00:00
gnu/fs r16312 is not any longer real since many years (likely since when VFS 2012-11-19 22:43:45 +00:00
i386 Fix a minor warning in sys/i386/xen/clock.c. 2012-11-12 20:50:11 +00:00
ia64 Flip the semantic of M_NOWAIT to only require the allocation to not 2012-11-14 20:01:40 +00:00
isa
kern remove stop_scheduler_on_panic knob 2012-11-25 14:22:08 +00:00
kgssapi
libkern Sync strlcpy with userland version. 2012-11-03 04:29:24 +00:00
mips Use bootverbose to control debug printfs from the Cavium Simple Executive 2012-11-24 02:12:24 +00:00
modules Merge ACPICA 20121114. 2012-11-20 21:01:59 +00:00
net Fix up a compile time warning if INET6 isn't defined. 2012-11-18 04:51:46 +00:00
net80211 Add some further BAR TX debugging; it was useful when figuring out 2012-10-28 04:18:49 +00:00
netatalk
netgraph Switch the entire IPv4 stack to keep the IP packet header 2012-10-22 21:09:03 +00:00
netinet Remove unused function. 2012-11-25 14:25:08 +00:00
netinet6 Remove opt_inet.h, it isn't required here. 2012-11-20 14:09:37 +00:00
netipsec Do not reduce ip_len by size of IP header in the ip_input() 2012-10-23 08:33:13 +00:00
netipx
netnatm
netncp
netpfil Simplify sending keepalives. 2012-11-09 18:23:38 +00:00
netsmb Fix panic due to page faults while in kernel mode, under conditions of 2012-10-31 03:34:07 +00:00
nfs Add two new options to the nfssvc(2) syscall that allow 2012-10-14 22:33:17 +00:00
nfsclient r16312 is not any longer real since many years (likely since when VFS 2012-11-19 22:43:45 +00:00
nfsserver Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
nlm Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
ofed Redo r242842, now actually fixing the warnings, as follows: 2012-11-12 22:01:29 +00:00
opencrypto Revert previous commit... 2012-10-10 08:36:38 +00:00
pc98 Reduce diffs against i386. 2012-11-10 13:48:41 +00:00
pci Remove duplicate const specifiers in many drivers (I hope I got all of 2012-11-05 19:16:27 +00:00
powerpc Setup BAT0 and BAT1 on the Wii. 2012-11-21 08:04:21 +00:00
rpc Modify the comment to take out the names and URL. 2012-10-25 19:30:58 +00:00
security Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
sparc64 Move the declaration of vm_phys_paddr_to_vm_page() from vm/vm_page.h 2012-11-16 05:55:56 +00:00
sys Document sin6_scope_id handling change and bump FreeBSD_version to 1000025. 2012-11-23 12:12:06 +00:00
teken
tools Revert previous commit... 2012-10-10 08:36:38 +00:00
ufs r16312 is not any longer real since many years (likely since when VFS 2012-11-19 22:43:45 +00:00
vm Correct an error in r230623. When both VM_ALLOC_NODUMP and VM_ALLOC_ZERO 2012-11-21 06:26:18 +00:00
x86 Provide the reading and display of the Standard Extended Features, 2012-11-01 15:14:37 +00:00
xdr
xen Move the corresponding MTX_SYSINIT() next to their struct mtx declaration 2012-10-26 17:31:35 +00:00
Makefile