Robert Watson a28ce935d9 Modify entropy harvesting locking strategy: ... - Trade off granularity to reduce overhead, since the current model doesn't appear to reduce contention substantially: move to a single harvest mutex protecting harvesting queues, rather than one mutex per source plus a mutex for the free list. - Reduce mutex operations in a harvesting event to 2 from 4, and maintain lockless read to avoid mutex operations if the queue is full. - When reaping harvested entries from the queue, move all entries from the queue at once, and when done with them, insert them all into a thread-local queue for processing; then insert them all into the empty fifo at once. This reduces O(4n) mutex operations to O(2) mutex operations per wakeup. In the future, we may want to look at re-introducing granularity, although perhaps at the granularity of the source rather than the source class; both the new and old strategies would cause contention between different instances of the same source (i.e., multiple network interfaces). Reviewed by: markm		2004-10-09 22:04:13 +00:00
..
alpha	Rework how we store process times in the kernel such that we always store	2004-10-05 18:51:11 +00:00
amd64	Make pte_load_store() an atomic operation in all cases, not just i386 PAE.	2004-10-08 08:23:43 +00:00
arm	Add optimized version of the bswap macroes for constants if __OPTIMIZED__ is	2004-10-01 16:55:59 +00:00
boot	Back out changes which were introduced to delay mounting root file system.	2004-10-05 11:26:43 +00:00
cam	Remove the camnet swi and CAM_PERIPH_NET. It has never been used, and given	2004-10-05 04:22:20 +00:00
coda	Do not use devsw() but si_devsw direction. This is still bogus but a	2004-09-23 12:19:24 +00:00
compat	Close a race between a thread exiting and the freeing of it's stack.	2004-10-06 14:23:00 +00:00
conf	Forcibly create symlinked headers, otherwise the build process may fail	2004-10-09 13:51:28 +00:00
contrib	Add an additional struct inpcb * argument to pfil(9) in order to enable	2004-09-29 04:54:33 +00:00
crypto
ddb	Refactor a bunch of scheduler code to give basically the same behaviour	2004-09-05 02:09:54 +00:00
dev	Modify entropy harvesting locking strategy:	2004-10-09 22:04:13 +00:00
doc
fs	Rework how we store process times in the kernel such that we always store	2004-10-05 18:51:11 +00:00
gdb	Comment-out the debugging printf I left in in case there were some	2004-08-10 19:32:33 +00:00
geom	Only do the geometry translations on ad* devices, other devices seems to	2004-10-08 21:27:27 +00:00
gnu	Desupport device nodes on EXT2 filesystems.	2004-09-27 20:38:46 +00:00
i4b	Kill count device support from config. I've changed the last few	2004-08-30 23:03:58 +00:00
i386	style(9)	2004-10-09 08:31:21 +00:00
ia64	Add the Madison II, which is the second generation Madison. The Madison II	2004-10-06 02:43:28 +00:00
isa	Introduce a tunable to disable support for Synaptics touchpads. A number of	2004-09-29 23:49:57 +00:00
isofs/cd9660	Hold proper thread count while frobbing drivers ioctl.	2004-09-24 07:24:02 +00:00
kern	Remove inlined m_tag_free(). Rename _m_tag_free() to m_tag_free()	2004-10-09 13:25:19 +00:00
libkern	Don't attempt to profile __udivsi3() and friends, as mcount() uses them.	2004-10-01 16:44:08 +00:00
modules	Port NetBSD auxio driver. The driver was modified to use led(4) and can	2004-10-09 07:31:03 +00:00
net	Change pfil starvation prevention from fail-open to fail-close.	2004-10-08 12:07:20 +00:00
net80211	Add a new network interface flag, IFF_NEEDSGIANT, which will allow	2004-07-27 23:20:45 +00:00
netatalk	Inline umich license from COPYRIGHT to make it clear what license the	2004-08-10 03:23:05 +00:00
netatm	Avoid casts as lvalues.	2004-07-28 06:59:55 +00:00
netgraph	Return 0, not NULL, from a function declared as returning int.	2004-10-09 14:20:18 +00:00
netinet	Acquire the send socket buffer lock around tcp_output() activities	2004-10-09 16:48:51 +00:00
netinet6	fixed too delayed routing cache expiry. (tvtohz() converts a time interval to ticks, whereas hzto() converts an absolute time to ticks)	2004-10-06 03:32:26 +00:00
netipsec	Remove extraneous SECPOLICY_LOCK_DESTROY calls that cause the mutex to be	2004-10-02 00:19:05 +00:00
netipx	Mark Netgraph TTY, KAME IPSEC, and IPX/SPX as requiring Giant for correct	2004-08-28 15:24:53 +00:00
netkey	Merge netipsec/key.c:1.17 into KAME pfkey implementation:	2004-09-30 00:49:55 +00:00
netnatm
netncp
netsmb	Avoid casts as lvalues.	2004-07-28 06:59:55 +00:00
nfs
nfs4client	Remove NFS4 vop method vector for devices: we are desupporing device nodes	2004-09-27 20:02:50 +00:00
nfsclient	nfsclient/nfs_bio.c has a PHOLD() without a PRELE(). Neither should	2004-10-01 05:01:41 +00:00
nfsserver	Convert a mtx_lock(&Giant) to a mtx_unlock(&Giant) in nfsrv_link() to	2004-08-25 16:52:59 +00:00
opencrypto	Don't acquire Giant in cryptof_close(), as the code is intended to be	2004-08-10 03:26:17 +00:00
pc98	Add more PnP serial cards support.	2004-10-01 15:58:54 +00:00
pccard	Move PNP IDs back into oldcard files	2004-08-13 06:57:31 +00:00
pci	Fix sis, bfe and ndis in the same way dc was fixed:	2004-10-08 16:14:42 +00:00
posix4
powerpc	Add sc_iostart to softc and unbreak the build.	2004-09-27 19:51:58 +00:00
rpc	Prefer C99's __func__ over GCC's __FUNCTION__.	2004-09-23 18:25:46 +00:00
security	Remove the debugging tunable, it was not being used.	2004-09-10 15:14:50 +00:00
sparc64	Flush the register windows before we start changing the context.	2004-10-09 16:42:09 +00:00
sys	Add SOCKBUF_UNLOCK_ASSERT(), which asserts that the current thread does	2004-10-09 16:42:57 +00:00
tools
ufs	Fix fsbtodb() for UFS1. This fixes an overflow for file sizes >1 TB,	2004-10-09 20:16:06 +00:00
vm	In the previous revision, I did not intend to change the default value	2004-10-09 18:51:32 +00:00
Makefile	Add a NO_BOOT knob to prevent building the boot blocks and loader.	2004-08-19 09:54:28 +00:00