Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #706
Difficulty: Medium
Shared information bias is known as the tendency for group members to spend more time and energy discussing information that all members are already familiar with (i.e., shared information), and less time and energy discussing information that only some members are aware of.
True or False?
Linux & Unix Commands - Search Man Pages

bp_mapout(9f) [opensolaris man page]

bp_mapout(9F)						   Kernel Functions for Drivers 					     bp_mapout(9F)

NAME
bp_mapout - deallocate virtual address space SYNOPSIS
#include <sys/types.h> #include <sys/buf.h> void bp_mapout(struct buf *bp); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
bp Pointer to the buffer header structure. DESCRIPTION
bp_mapout() deallocates system virtual address space allocated by a previous call to bp_mapin(9F).bp_mapout() should only be called on buffers which have been allocated and are owned by the device driver. It must not be called on buffers passed to the driver through the strategy(9E) entry point (for example a filesystem). Because bp_mapin(9F) does not keep a reference count, bp_mapout() will wipe out any kernel mapping that a layer above the device driver might rely on. CONTEXT
bp_mapout() can be called from user context only. SEE ALSO
strategy(9E), bp_mapin(9F), buf(9S) Writing Device Drivers SunOS 5.11 15 Nov 1996 bp_mapout(9F)

Check Out this Related Man Page

bp_mapin(9F)						   Kernel Functions for Drivers 					      bp_mapin(9F)

NAME
bp_mapin - allocate virtual address space SYNOPSIS
#include <sys/types.h> #include <sys/buf.h> void bp_mapin(struct buf *bp); INTERFACE LEVEL
Architecture independent level 1 (DDI/DKI). PARAMETERS
bp Pointer to the buffer header structure. DESCRIPTION
bp_mapin() is used to map virtual address space to a page list maintained by the buffer header during a paged- I/O request. bp_mapin() allocates system virtual address space, maps that space to the page list, and returns the starting address of the space in the bp->b_un.b_addr field of the buf(9S) structure. Virtual address space is then deallocated using the bp_mapout(9F) function. If a null page list is encountered, bp_mapin() returns without allocating space and no mapping is performed. CONTEXT
bp_mapin() can be called from user and kernel contexts. SEE ALSO
bp_mapout(9F), buf(9S) Writing Device Drivers SunOS 5.10 13 Sep 1992 bp_mapin(9F)

14 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Trying to block signal

I have this code that doesnt do what it is suppose to do. It should block signal that I send while process is running. I press control+z while this process is running and it should be blocked but it isnt. When i press control+z it gives me this.... + Stopped When I change SIGTSP into SIGINT then... (5 Replies)
Discussion started by: joker40
5 Replies

2. Fedora

How to learn UNIX

First question is how do you learn UNIX on a home lab. I understand that HP-UX isn't free and neither is SCO Unix and they don't run on x86 based systems anyways. The choices I believe are going to be OpenSolaris and FreeBSD. My question is UNIX commands the same across the board so if I learn... (11 Replies)
Discussion started by: michael78
11 Replies

3. Solaris

solaris zones vs container..

kindly share what are difference b/w solaris zones and containers.... (8 Replies)
Discussion started by: Rajesh_Apple
8 Replies

4. Shell Programming and Scripting

What does this mean?

Hello all, I am a newbie in shell scripting. I want to know what does the below text means? 6.355u 1.679s 0:12.68 63.2% 0+0k 0+0io 0pf+0w I am getting this line (on terminal) after every successful execution of my script. Thanks in advance . . :) -MD (15 Replies)
Discussion started by: manands07
15 Replies

5. SCO

Study UNIX Kernel

Hi all, I hope you are fine, I'd like study Os I tried a book like Silberschatz it's a good book but like other books it talks about the concepts abstractly and that's due to it try to encompass many concepts from many operating systems in GENERAL. i am not too much comfortable from these... (20 Replies)
Discussion started by: Abdo_8008
20 Replies

6. UNIX for Dummies Questions & Answers

Change directory for core file

Hi, Some of the process in th environment are producing a core file. These core files are produced by default in the directory from which they were launched. I want to change the default directory to say /tmp of that environment. I am using both Linux and Solaris, so will need the solution... (2 Replies)
Discussion started by: Raj999
2 Replies

7. UNIX for Beginners Questions & Answers

Grep the 'not running' jobs and will send the update in mail with its name(job)

my request is: i have to create a script , which will grep the 'not running' jobs and will send the update in mail with its name(job) Scenario: logged in to machine abc went to particular path: cd /a/b/c then ./script1.sh status (script.sh is a script,whose status gives info about 10 jobs... (1 Reply)
Discussion started by: learner987
1 Replies

8. Solaris

Free Sun Blade 2k, Ultra 2, Ross Hyperstation 30, cards, memory- Baltimore, MD

Hi all, My home server was Solaris for quite a while- I started with an Ultra 2 about 20 years ago, ended with a Blade 2000- but I've transitioned to Linux and am not going back. I miss the Solaris experience a bit (but not the Oracle experience), besides running with modern and small and quiet... (0 Replies)
Discussion started by: gpounce32768
0 Replies

9. Shell Programming and Scripting

Identify problem with while getopts

can anyone spot a problem with the below: $ $ cat getopts.sh #!/bin/sh usage() { echo "myscript.sh local /tmp data.txt 600s -query" 1>&2; exit 1; } while... (4 Replies)
Discussion started by: SkySmart
4 Replies

10. Red Hat

%memused is high

All I see cpu and memory usage are under control, only cache gets high upto 99% using sar -r command I did echo3 and cleaned the drop caches do we need to monitor this , why my application going high upto 99.8% memused in sar command , this is cache memory which is going high will this... (12 Replies)
Discussion started by: anil529
12 Replies

11. Solaris

Solaris 10 - password complexity not working

I have been trying to enable password complexity variables on Solaris 10 by editing the /etc/default/passwd file but none of my changes are taking effect (I'm still able to set passwords that violate the rules I am trying to implement). I've tried an O/S reboot after the changes but that had no... (6 Replies)
Discussion started by: triggerhippie
6 Replies

12. What is on Your Mind?

What is good?

Hello everyone, I am using centos, 1) solaris is free right? 2) I want to learn solaris and install it in a computer that I am mounting, I would like know what is strong in solaris and if do it is wise. I am programmer python, learning machine and programming in general,..any help thanks,.. (6 Replies)
Discussion started by: gitac
6 Replies

13. What is on Your Mind?

PHP Man Pages Now Available (Over 10,000)

Hello! Yesterday we added over 10,000 PHP man pages to our man page section. I've not yet got our unique and special recursive search feature working; but you can still access the PHP man pages directly by selecting PHP in the man sets drop down menu (left side) and then section 3 (right... (3 Replies)
Discussion started by: Neo
3 Replies

14. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

Featured Tech Videos