Alexander Motin bfbfc4a3cb Count consecutive read requests as blocking in CTL for files and ZVOLs. ... Technically read requests can be executed in any order or simultaneously since they are not changing any data. But ZFS prefetcher goes crasy when it receives consecutive requests from different threads. Since prefetcher works on level of separate blocks, instead of two consecutive 128K requests it may receive 32 8K requests in mixed order. This patch is more workaround then a real fix, and it does not fix all of prefetcher problems, but it improves sequential read speed by 3-4x times in some configurations. On the other side it may hurt performance if some backing store has no prefetch, that is why it is disabled by default for raw devices. MFC after: 2 weeks		2014-12-06 20:39:25 +00:00
..
amd64	This configuration file removes several debugging options, including	2014-12-02 19:55:43 +00:00
arm	Use the unified syntax when generating assembly for clang. The clang 3.5	2014-12-06 11:59:35 +00:00
boot	Define the ffs() function in the USB bootloader's global and	2014-12-05 12:04:47 +00:00
bsm
cam	Count consecutive read requests as blocking in CTL for files and ZVOLs.	2014-12-06 20:39:25 +00:00
cddl	Apply the same fix in r274697 to the ARM case.	2014-12-06 12:03:09 +00:00
compat	The process spin lock currently has the following distinct uses:	2014-11-26 14:10:00 +00:00
conf	Ignore more warnings with external gcc	2014-11-29 14:30:39 +00:00
contrib	Correctly define constants.	2014-11-28 04:07:06 +00:00
crypto	Fix gcc build: preserve const qualifier when casting input values.	2014-11-11 13:37:28 +00:00
ddb	ddb: ANSI-fy function declarations.	2014-10-12 18:01:52 +00:00
dev	cxgbe(4): allow the driver to use rx buffers that do not end on a pack	2014-12-06 01:47:38 +00:00
fs	The process spin lock currently has the following distinct uses:	2014-11-26 14:10:00 +00:00
gdb	Add support for gdb's memory searching capabilities to our in-kernel gdb	2014-09-05 16:40:47 +00:00
geom	Avoid unneeded malloc/memcpy/free if there is no metadata on disk.	2014-12-05 10:23:18 +00:00
gnu	reiserfs: Use signed i_nlink	2014-09-25 19:10:32 +00:00
i386	This configuration file removes several debugging options, including	2014-12-02 19:55:43 +00:00
isa
kern	Const poison in a few places to ensure we don't modify things	2014-12-03 22:14:13 +00:00
kgssapi	Avoid dynamic syscall overhead for statically compiled modules.	2014-10-26 19:42:44 +00:00
libkern	Use the unified syntax in a few more assembly files	2014-12-05 19:08:36 +00:00
mips	Switch is an 8316, so make the comments say that.	2014-12-03 23:37:23 +00:00
modules	There never was a PC Card joystick attachment that worked. Kill the	2014-11-22 20:31:20 +00:00
net	Remove unneded check. No need to do m_pullup to the size that we prepended.	2014-12-02 05:41:03 +00:00
net80211	Fix multiple incorrect SYSCTL arguments in the kernel:	2014-10-21 07:31:21 +00:00
netgraph	In preparation of merging projects/sendfile, transform bare access to	2014-11-12 09:57:15 +00:00
netinet	Fix the support of mapped IPv4 addresses.	2014-12-06 20:00:08 +00:00
netinet6	This is the SCTP specific companion of	2014-12-04 21:17:50 +00:00
netipsec	Fix style(9) and remove m_freem(NULL).	2014-12-04 05:02:12 +00:00
netnatm
netpfil	pf(4) needs to have a correct checksum during its processing.	2014-11-19 13:31:08 +00:00
netsmb
nfs	Avoid dynamic syscall overhead for statically compiled modules.	2014-10-26 19:42:44 +00:00
nfsclient	Follow up to r225617. In order to maximize the re-usability of kernel code	2014-10-16 18:04:43 +00:00
nfsserver
nlm	Avoid dynamic syscall overhead for statically compiled modules.	2014-10-26 19:42:44 +00:00
ofed	Start process of removing the use of the deprecated "M_FLOWID" flag	2014-12-01 11:45:24 +00:00
opencrypto	Fix build for kernels without COMPAT_FREEBSD32.	2014-09-22 17:32:27 +00:00
pc98	This configuration file removes several debugging options, including	2014-12-02 19:55:43 +00:00
powerpc	This configuration file removes several debugging options, including	2014-12-02 19:55:43 +00:00
rpc	In preparation of merging projects/sendfile, transform bare access to	2014-11-12 09:57:15 +00:00
security
sparc64	This configuration file removes several debugging options, including	2014-12-02 19:55:43 +00:00
sys	Always ignore the deprecated MAP_RENAME and MAP_NORESERVE flags to mmap().	2014-12-05 15:24:42 +00:00
teken
tools
ufs	Merge from projects/sendfile:	2014-11-23 12:01:52 +00:00
vm	Always ignore the deprecated MAP_RENAME and MAP_NORESERVE flags to mmap().	2014-12-05 15:24:42 +00:00
x86	Improve support for XSAVE with debuggers.	2014-11-21 20:53:17 +00:00
xdr
xen	opt_global.h is included automatically in the build. No need to	2014-11-18 17:06:56 +00:00
Makefile	Remove "pci" from CSCOPEDIRS.	2014-09-23 06:32:19 +00:00