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55 Commits

Author SHA1 Message Date
Poul-Henning Kamp
e869d3777e Give better diagnostic for problems with backing files. 2004-07-25 08:17:23 +00:00
Ruslan Ermilov
9806e23132 Mechanically kill hard sentence breaks. 2004-07-02 21:45:06 +00:00
Ruslan Ermilov
d04b5dfe6c Assorted markup, grammar, and spelling fixes. 2004-05-17 08:35:43 +00:00
Poul-Henning Kamp
7a6b2b6429 Fix a long-standing deadlock issue with vnode backed md(4) devices: 
On vnode backed md(4) devices over a certain, currently undetermined
size relative to the buffer cache our "lemming-syncer" can provoke
a buffer starvation which puts the md thread to sleep on wdrain.

This generally tends to grind the entire system to a stop because the
event that is supposed to wake up the thread will not happen until a fair
bit of the piled up I/O requests in the system finish, and since a lot
of those are on a md(4) vnode backed device which is currently waiting
on wdrain until a fair amount of the piled up ... you get the picture.

The cure is to issue all VOP_WRITES on the vnode backing the device
with IO_SYNC.

In addition to more closely emulating a real disk device with a
non-lying write-cache, this makes the writes exempt from rate-limited
(there to avoid starving the buffer cache) and consequently prevents
the deadlock.

Unfortunately performance takes a hit.

Add "async" option to give people who know what they are doing the
old behaviour.
 2004-03-10 20:41:09 +00:00
Poul-Henning Kamp
91f9647d49 s/bytes/byte/ 2004-02-19 19:53:07 +00:00
Poul-Henning Kamp
79ae25f61f Note that geometry can also be specified on vnode backed deviecs. 2004-01-12 10:54:09 +00:00
Poul-Henning Kamp
b4bca2d5ec Warn that big malloc disks are a panic(8) implementation. 
Submitted by:	Colin Percival <cperciva@builder.daemonology.net>
(Who should really get his own bit one of these days!)

PR:	59988
 2004-01-02 14:28:06 +00:00
Marc Fonvieille
84783ceaeb Add a full example of a file-backed disk creation, I used the Handbook's 
example.

PR:		docs/51897
Submitted by:	Kevin Oberman <oberman@es.net>
 2003-10-11 09:59:25 +00:00
Marc Fonvieille
8b23842d38 s/disklabel/bsdlabel where needed. 2003-10-11 08:24:07 +00:00
Poul-Henning Kamp
076cb6a8c9 Document the -x and -y options. 2003-09-21 19:05:35 +00:00
Alexander Kabaev
8a50130bbb Do not compare unsigned int values with ULONG_MAX. The comparison is 
always false on 64bit platforms and GCC 3.3.1 issues warning there.
 2003-07-11 05:47:05 +00:00
Robert Watson
f79c46d3f4 Add "-n" argument, which causes mdconfig to simply print the unit 
number X, rather than mdX, making it easier to script tests that
use md devices but don't want to make assumptions about any existing
md use (such as in diskless environments).
 2003-06-11 06:38:24 +00:00
Doug Barton
1b6c6f4aae Add .Xr's to mdmfs(8). 
Submitted by:	Scot W. Hetzel <hetzels@westbend.net>
 2003-04-27 01:46:56 +00:00
Poul-Henning Kamp
4e8bfe1482 Add a couple of undocumented test options to MD(4) to aid in regression 
testting of GEOM.
 2003-04-09 11:59:29 +00:00
Yaroslav Tykhiy
252bcf459d Give clearer diagnostics on some cases of invalid 
combinations of mdconfig(8) command-line arguments.

Make mdconfig(8) accept "-a -f file -o options"
equally with "-a -f file" (assuming "-t vnode".)
 2003-04-01 15:23:55 +00:00
Poul-Henning Kamp
ebe789d61c Add a "-S sectorsize" option to enable Kirk to find a bug :-) 2003-03-03 13:05:00 +00:00
Poul-Henning Kamp
e39eff98a0 Don't use the kern.disks sysctl to find a list of md devices, use the 
MDIOCLIST ioctl instead.

Spotted by:	keramida
 2003-01-27 08:01:08 +00:00
Giorgos Keramidas
f9e425b336 Make sure strsep() gets a nul-terminated string. 
Reviewed by:	phk
 2002-10-10 10:07:19 +00:00
Poul-Henning Kamp
ea396d5bfa Don't show disklabel in the examples, it is not necessary. 2002-09-26 21:29:10 +00:00
Tom Rhodes
ce66ddb763 s/filesystem/file system/g as discussed on -developers 2002-08-21 18:11:48 +00:00
Warner Losh
9d010543f4 Don't use NULL where you really mean 0 to sysctlbyname. 2002-08-21 15:15:15 +00:00
Ralf S. Engelschall
32f28b1541 Replace extra call to "tunefs" with the equivalent of "newfs -U". 
Reviewed by:	phk
 2002-07-15 11:30:21 +00:00
Philippe Charnier
e1205e80e5 The .Nm utility 2002-07-06 19:34:18 +00:00
Dag-Erling Smørgrav
d397408818 Usage style sweep: spell "usage" with a small 'u'. 
Also change one case of blatant __progname abuse (several more remain)
This commit does not touch anything in src/{contrib,crypto,gnu}/.
 2002-04-22 13:44:47 +00:00
Mike Barcroft
40dcc8608d Revert 1.20: 
Memory disks may be used for other purposes besides newfs(8), so it
isn't helpful to require the minimum size meet newfs(8)'s criteria.
 2002-03-21 12:03:09 +00:00
Mike Barcroft
6a1bd01754 Provide a proper error message in mdconfig(8) when a filesystem is too 
small, instead of a less meaningful error in newfs(8).
 2002-03-21 07:46:09 +00:00
Dima Dorfman
53d745bc7c Actually make use of the md_version field of 'struct mdio'. In order 
not to needlessly break compatibility, decrement MDIOVERSION to 0.

Approved by:	phk
 2001-12-20 06:38:21 +00:00
David E. O'Brien
2d68bf45bf Default to WARNS=2. 
Binary builds that cannot handle this must explicitly set WARNS=0.

Reviewed by:	mike
 2001-12-04 02:19:58 +00:00
Ruslan Ermilov
b87581119e mdoc(7) police: removed (now gratuitous) .Xo/.Xc brackets. 2001-08-10 10:41:30 +00:00
Dima Dorfman
3fa96e6678 Move all the prototypes to one place. 2001-08-07 19:27:46 +00:00
Dima Dorfman
26a0ee75c6 Introduce a force option, MD_FORCE, that instructs the driver to 
bypass some extra anti-foot-shooting measures.  Currently, its only
effect is to allow detaching a device while it's still open (e.g.,
mounted).  This is useful for testing how the system reacts to a disk
suddenly going away, which can happen with some removeable media.

At this point, the force option is only checked on detach, so it
would've been possible to allow the option to be passed with the
MDIOCDETACH operation.  This was not done to allow the possibility of
having the force flag influence other tests in the future, which may
not necessarily deal with detaching the device.

Reviewed by:	sobomax
Approved by:	phk
 2001-08-07 19:23:16 +00:00
Dima Dorfman
10b0e058bb Use MD_NAME and MDCTL_NAME constants where appropriate. 2001-07-18 13:32:38 +00:00
Dima Dorfman
7ebcc426ef Remove whitespace at EOL. 2001-07-15 07:53:42 +00:00
Ruslan Ermilov
9fe48c6e8d mdoc(7) police: removed HISTORY info from the .Os call. 2001-07-10 11:04:34 +00:00
Dima Dorfman
c894b25a2f Constify mdmaybeload(), add a prototype for usage(), and get rid of a 
sizeof(int) == sizeof(long) assumption; clamp down with WARNS=2.
 2001-06-21 02:10:26 +00:00
Dima Dorfman
78baea25b2 Don't assume the length of MD_NAME is 2. 2001-06-21 01:39:01 +00:00
Dima Dorfman
2885b42173 Fail if -s isn't specified for an MD_MALLOC or MD_SWAP disk; the 
driver itself obviously won't configure such a disk, but the error
returned (EDOM) is more cryptic to the average user than it should be.

Also assert that the argument to -u is in fact a valid unit; don't
just accept any string to mean 0.

Approved by:	phk
 2001-06-21 01:36:09 +00:00
Ruslan Ermilov
0a5779d45b - Backout botched attempt to introduce MANSECT feature. 
- MAN[1-9] -> MAN.
 2001-03-26 14:33:27 +00:00
Ruslan Ermilov
fe655281c5 Set the default manual section for sbin/ to 8. 2001-03-20 18:13:31 +00:00
Ruslan Ermilov
3832aecacb mdoc(7) police: add a missing An call. 2001-03-12 09:18:12 +00:00
Maxim Sobolev
ed23a390c2 In the absence of explicit `-t type'' option assume that `-f file'' 
implies ``-t vnode''.

Approved by:	phk
 2001-03-09 21:15:08 +00:00
Poul-Henning Kamp
e10469fef8 Make md(4) and mdconfig(8) take over the role of vn(4) and vnconfig(8) 
entirely as previously advertised.

md(4) adopted all assets of vn(4) some time back and has proper devfs
support and cloning abilities to boot.
 2001-03-09 20:09:28 +00:00
Poul-Henning Kamp
83da2a90ae 1) If mdconfig isn't given an action argument, it assumes detach. 
2) Running `mdconfig -l` without any attached devices results in
mdconfig printing "md0" to standard output.

Submitted by:	dd [1]

[1] no, not "dd(1)" but "Dima Dorfman"
 2001-03-09 20:05:06 +00:00
Poul-Henning Kamp
3f6f92161c Remove "autounit" from settable options, it's the default unless you 
specify -u.

Spotted by:	dcs
 2001-02-26 15:31:47 +00:00
Poul-Henning Kamp
a69134f24c Forgot to remove unneeded "intcmp" function. 2001-02-25 13:14:41 +00:00
Poul-Henning Kamp
174b5e9aec Make "md" and "mdctl" macroized parameters. 
Implement "-l" option to mdconfig which can list one or all md devices.

Submitted by:   Dima Dorfman <dima@unixfreak.org>
 2001-02-25 13:12:57 +00:00
Poul-Henning Kamp
57e9624ec9 Make md/mdconfig do kld. 
Submitted by:	dcs
 2001-02-24 16:26:41 +00:00
Poul-Henning Kamp
fb1023d670 Strip optional prefixes "/dev/" and "md" from the -u argument. 2001-01-31 08:41:18 +00:00
Poul-Henning Kamp
3b42f2f3bb Duh, the version of mdconfig.c I committed came from the wrong machine. 
Commit the right version, but without the -b option which is too evil
for the present.

Remove -b and preload from the manpage as well.
 2001-01-28 20:17:46 +00:00
Poul-Henning Kamp
353f4b3966 Don't specify fragment size, it autosizes from the sectorsize. 
Remember to set mode 1777 on /tmp

Submitted by:	mjacob
 2001-01-28 20:03:02 +00:00