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freebsd-nq/sys
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Matthew Dillon 2b6b0df712 This implements a better launder limiting solution. There was a solution 
in 4.2-REL which I ripped out in -stable and -current when implementing the
low-memory handling solution.  However, maxlaunder turns out to be the saving
grace in certain very heavily loaded systems (e.g. newsreader box).  The new
algorithm limits the number of pages laundered in the first pageout daemon
pass.  If that is not sufficient then suceessive will be run without any
limit.

Write I/O is now pipelined using two sysctls, vfs.lorunningspace and
vfs.hirunningspace.  This prevents excessive buffered writes in the
disk queues which cause long (multi-second) delays for reads.  It leads
to more stable (less jerky) and generally faster I/O streaming to disk
by allowing required read ops (e.g. for indirect blocks and such) to occur
without interrupting the write stream, amoung other things.

NOTE: eventually, filesystem write I/O pipelining needs to be done on a
per-device basis.  At the moment it is globalized.
2000-12-26 19:41:38 +00:00
..
alpha Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
amd64 Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
boot Disabled boot2 for the moment, because it needs aout tools. 2000-12-24 14:54:34 +00:00
cam Generalize quirk for Sony Memory Sticks. Any device that starts with 2000-12-14 22:08:13 +00:00
coda When p_ucred is passed to the venus daemon, first grab the proc lock to 2000-12-15 00:12:30 +00:00
compat Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
compile
conf Back out the modules `make obj' speedup. 2000-12-24 13:29:58 +00:00
contrib/dev Resolve conflicts from the ACPI CA 20001215 vendor import. 2000-12-21 07:04:32 +00:00
crypto Initial import of AES algorithm code (aka Rijndael) from KAME. 2000-10-30 11:03:32 +00:00
ddb Previous commit changing SYSCTL_HANDLER_ARGS violated KNF. 2000-07-04 11:25:35 +00:00
dev Use M_ZERO flag on malloc when approbiate. 2000-12-26 12:05:49 +00:00
fs This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
geom Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
gnu Avoid a data-consistency race between write() and mmap() 2000-12-17 23:57:05 +00:00
i4b Divorce the kernel binary ABI version number from the message 2000-12-18 20:03:32 +00:00
i386 Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
ia64 Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
isa Add OZO8008 - Zoom (33.6k Modem). 2000-12-26 06:52:57 +00:00
isofs/cd9660 Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
kern This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
libkern Add __ucmpdi2 prototype to quelch a warning. 2000-12-07 22:28:20 +00:00
miscfs This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
modules add sys/dev/sound/pcm/buffer.c, lefo out of last commit 2000-12-23 03:27:09 +00:00
msdosfs Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
net * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netatalk * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netatm * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netgraph Divorce the kernel binary ABI version number from the message 2000-12-18 20:03:32 +00:00
netinet Update the "icmp_admin_prohib_like_rst" code to check the tcp-window and 2000-12-24 10:57:21 +00:00
netinet6 * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netipx * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netkey Revert previous commit after discussion with phk. 2000-10-30 09:13:46 +00:00
netnatm Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
netncp * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
netns * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
nfs * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
nfsclient * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
nfsserver * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
ntfs Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
nwfs v_interlock is a mutex now, not simple lock. 2000-11-04 02:42:11 +00:00
pc98 Merged from sys/i386/conf/GENERIC revisions 1.292 - 1.294. 2000-12-16 03:31:44 +00:00
pccard add PNPID for PnP PCMCIA, SCM SwapBox Classic X2P. 2000-12-11 15:02:50 +00:00
pci * Rename M_WAIT mbuf subsystem flag to M_TRYWAIT. 2000-12-21 21:44:31 +00:00
posix4
powerpc Protect proc.p_pptr and proc.p_children/p_sibling with the 2000-12-23 19:43:10 +00:00
rpc
svr4 This patchset fixes a large number of file descriptor race conditions. 2000-11-18 21:01:04 +00:00
sys This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
tools Simplify this a bit so that it doesn't have to generate silly redundant 2000-12-06 06:59:38 +00:00
ufs This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
vm This implements a better launder limiting solution. There was a solution 2000-12-26 19:41:38 +00:00
Makefile I should know better than to touch this without testing a 'make release' 2000-08-24 18:53:09 +00:00