Ian Dowse 4784a46912 Replace the code for reading and writing the kernel message buffer ... with a new implementation that has a mostly reentrant "addchar" routine, supports multiple message buffers in the kernel, and hides the implementation details from callers. The new code uses a kind of sequence number to represend the current read and write positions in the buffer. This approach (suggested mainly by bde) permits the read and write pointers to be maintained separately, which reduces the number of atomic operations that are required. The "mostly reentrant" above refers to the way that while it is now always safe to have any number of concurrent writers, readers could see the message buffer after a writer has advanced the pointers but before it has witten the new character. Discussed on: freebsd-arch		2003-06-22 02:18:31 +00:00
..
alpha	Fix a performance bug in all of the various implementations of	2003-06-18 02:57:38 +00:00
amd64	Use direct map in pmap_map().	2003-06-20 14:09:33 +00:00
arm	sys/sys/limits.h:	2003-05-19 20:29:07 +00:00
boot	When looking for the ':' separator in the root path, don't go past	2003-06-16 20:48:56 +00:00
cam	Merge common XPT_CALC_GEOMETRY functions into a single convenience function.	2003-06-14 22:17:41 +00:00
coda	Remove in toto coda_strategy which incorrectly implemented vop_panic();	2003-06-15 18:45:15 +00:00
compat	Rename P_THREADED to P_SA. P_SA means a process is using scheduler	2003-06-15 00:31:24 +00:00
conf	Replace the code for reading and writing the kernel message buffer	2003-06-22 02:18:31 +00:00
contrib	This commit was generated by cvs2svn to compensate for changes in r115367,	2003-05-28 17:32:31 +00:00
crypto	Use __FBSDID().	2003-06-10 21:44:29 +00:00
ddb	Rename P_THREADED to P_SA. P_SA means a process is using scheduler	2003-06-15 00:31:24 +00:00
dev	fix another LP64 problem. READ_IVAR takes a pointer to an uintptr_t, not	2003-06-20 07:22:54 +00:00
fs	fix grammar in comment	2003-06-20 23:29:04 +00:00
geom	Sleep on "-" in our normal state to simplify debugging.	2003-06-18 10:33:09 +00:00
gnu	Add the same KASSERT to all VOP_STRATEGY and VOP_SPECSTRATEGY implementations	2003-06-15 18:53:00 +00:00
i4b	Use __FBSDID().	2003-06-11 00:01:05 +00:00
i386	fix another LP64 problem. READ_IVAR takes a pointer to an uintptr_t, not	2003-06-20 07:22:54 +00:00
ia64	Add TLS related relocation.	2003-06-19 06:51:43 +00:00
isa	Force media autodetection if the device has lost its parameter table.	2003-06-16 08:42:20 +00:00
isofs/cd9660	Add the same KASSERT to all VOP_STRATEGY and VOP_SPECSTRATEGY implementations	2003-06-15 18:53:00 +00:00
kern	Replace the code for reading and writing the kernel message buffer	2003-06-22 02:18:31 +00:00
libkern	Use __FBSDID().	2003-06-11 05:37:42 +00:00
modules	Add "GEOM_FOX", a class which detects and selects between multiple	2003-06-18 09:29:28 +00:00
net	Now that most of this file is new, stylify the rest and correct the	2003-06-18 10:53:49 +00:00
netatalk
netatm	Use __FBSDID().	2003-06-11 07:22:30 +00:00
netgraph	Use the <sys/bitstring.h> rather than <bitstring.h>	2003-06-13 19:40:44 +00:00
netinet	Map icmp time exceeded responses to EHOSTUNREACH rather than 0 (no error);	2003-06-17 06:21:08 +00:00
netinet6	Do not attempt to access to inp_socket fields if the socket is in the TIME_WAIT	2003-06-17 00:31:30 +00:00
netipsec	Introduce an M_ASSERTPKTHDR() macro which performs the very common task	2003-04-08 14:25:47 +00:00
netipx	Use __FBSDID().	2003-06-11 05:37:42 +00:00
netkey	Use __FBSDID().	2003-06-11 05:37:42 +00:00
netnatm	Use __FBSDID().	2003-06-11 05:37:42 +00:00
netncp	Use __FBSDID().	2003-06-11 05:37:42 +00:00
netsmb	Avoid dereferencing the thread pointer in smb_iod_addrq() if it's NULL.	2003-06-14 15:45:34 +00:00
nfs
nfsclient	Lock the vm object when freeing a page.	2003-06-17 05:17:00 +00:00
nfsserver	Increase the size of the NFS server hash table to improve performance	2003-06-21 21:01:44 +00:00
opencrypto	Initialize struct fileops with C99 sparse initialization.	2003-06-18 18:16:40 +00:00
pc98	Replace evil abuse of geteblk() with malloc(9).	2003-06-16 07:41:47 +00:00
pccard	OLDCARD is OBSOLETE_IN_6. Tag it as such.	2003-06-12 04:46:43 +00:00
pci	Add vm object locking.	2003-06-19 02:01:33 +00:00
posix4	Use __FBSDID().	2003-06-11 06:34:30 +00:00
powerpc	Migrate the thread stack management functions from the machine-dependent	2003-06-14 23:23:55 +00:00
rpc
security	Use __FBSDID().	2003-06-11 00:56:59 +00:00
sparc64	add support for peeking at pci busses on UltraSparc systems. This prevents	2003-06-22 01:26:08 +00:00
sys	Replace the code for reading and writing the kernel message buffer	2003-06-22 02:18:31 +00:00
tools	The assertions generated to test VFS locking never included checks	2003-06-20 12:15:37 +00:00
ufs	Lock the vm object when freeing pages.	2003-06-15 21:50:38 +00:00
vm	Make some style and white-space changes to the copy-on-write path through	2003-06-22 00:00:11 +00:00
Makefile	Exclude sys/boot for amd64. There are still toolchain issues to deal	2003-05-08 06:35:39 +00:00