src/sys/dev/md, branch release/6.0.0_cvs FreeBSD source tree This commit was manufactured by cvs2svn to create tag 2005-11-03T00:35:26+00:00 cvs2svn cvs2svn@FreeBSD.org 2005-11-03T00:35:26+00:00 3640cb54210edbb7edbf1b12ef0127ecfcea967d 'RELENG_6_0_0_RELEASE'. This commit was manufactured to restore the state of the 6.0-RELEASE image. 
'RELENG_6_0_0_RELEASE'.

This commit was manufactured to restore the state of the 6.0-RELEASE image.
MFC: 2005-10-07T15:08:41+00:00 Poul-Henning Kamp phk@FreeBSD.org 2005-10-07T15:08:41+00:00 31d14eb0d633662f149c55f264a22a9c67b53bbd make sure the type is set early enough for the kthread to know to grab Giant for vnode backed devices. Approved by: re@ (scottl) 
	make sure the type is set early enough for the kthread to know
	to grab Giant for vnode backed devices.

Approved by:	re@ (scottl)
MFC: 2005-09-26T18:14:38+00:00 Poul-Henning Kamp phk@FreeBSD.org 2005-09-26T18:14:38+00:00 5eec9ecc16af67af8b7df133c24c45c0fd837f6d Fixes for various races in md. Approved by: re@ (scottl) 
	Fixes for various races in md.

Approved by:	re@ (scottl)
MFC md.c rev 1.154 2005-09-09T21:39:47+00:00 Christian S.J. Peron csjp@FreeBSD.org 2005-09-09T21:39:47+00:00 47c3af75ee00b10a8d76d2ea52ad516682c87466 MFC mdconfig.c rev 1.44 Dont allow read only backing stores to be modified PR: kern/84635 Approved by: re (kensmith) 
MFC mdconfig.c rev 1.44

Dont allow read only backing stores to be modified

PR:		kern/84635
Approved by:	re (kensmith)
MFC: sys/dev/md/md.c 1.155 2005-09-03T16:02:37+00:00 Pawel Jakub Dawidek pjd@FreeBSD.org 2005-09-03T16:02:37+00:00 b70af692ed0624f2784af13b73c05db2ee42ba34 - Add md_mtx lock to protect ID number and list of devices. - Always check mdnew() return value, as even in !autounit case kthread_create() can fail. Those two changes fix serval panics provoked by simple stress test. Tested by: Kris The BugMagnet Approved by: re (scottl) 
- Add md_mtx lock to protect ID number and list of devices.
- Always check mdnew() return value, as even in !autounit case
  kthread_create() can fail.

Those two changes fix serval panics provoked by simple stress test.

Tested by:	Kris The BugMagnet
Approved by:	re (scottl)
Request a CPU private mapping from sf_buf_alloc(). If the swap-backed 2005-02-13T21:51:50+00:00 Alan Cox alc@FreeBSD.org 2005-02-13T21:51:50+00:00 e340fc602be23c05a35f023bb91e70b4148c2ad9 memory disk is larger than the number of available sf_bufs, this improves performance on SMPs by eliminating interprocessor TLB shootdowns. For example, with 6656 sf_bufs, the default on my test machine, and a 256MB swap-backed memory disk, I see the command "dd if=/dev/md0 of=/dev/null bs=64k" achieve ~489MB/sec with the default, shared mappings, and ~587MB/sec with CPU private mappings. 
memory disk is larger than the number of available sf_bufs, this improves
performance on SMPs by eliminating interprocessor TLB shootdowns.  For
example, with 6656 sf_bufs, the default on my test machine, and a 256MB
swap-backed memory disk, I see the command
"dd if=/dev/md0 of=/dev/null bs=64k" achieve ~489MB/sec with the default,
shared mappings, and ~587MB/sec with CPU private mappings.
Use MAXMINOR 2005-01-29T16:50:04+00:00 Poul-Henning Kamp phk@FreeBSD.org 2005-01-29T16:50:04+00:00 d9aaa28f637d68bff7d1a5b24874fdb4e8feaa3c 






- Don't destroy UMA zone on error in mdcreate_malloc(), because we need it
2005-01-22T19:56:03+00:00

Pawel Jakub Dawidek
pjd@FreeBSD.org

2005-01-22T19:56:03+00:00

1db17c6db2fc3a2b13add894b4ac1e1580e81be2

  in mddestroy() to properly free already allocated memory.
  This fixes a panic when we want to create too big memory backed device
  with preallocate memory (-o reserve).
- Remove redundant { }.

MFC after:	1 week





  in mddestroy() to properly free already allocated memory.
  This fixes a panic when we want to create too big memory backed device
  with preallocate memory (-o reserve).
- Remove redundant { }.

MFC after:	1 week







Add a couple of mtx_asserts() to try to narrow down the window on
2005-01-22T19:08:50+00:00

Poul-Henning Kamp
phk@FreeBSD.org

2005-01-22T19:08:50+00:00

9d3a77c463fd003a8680158a8ce48ab48b80a23e

a bug repeatedly reported.





a bug repeatedly reported.







Start each of the license/copyright comments with /*-, minor shuffle of lines
2005-01-06T01:43:34+00:00

Warner Losh
imp@FreeBSD.org

2005-01-06T01:43:34+00:00

098ca2bda93c701c5331d4e6aace072495b4caaa