trace_block_plug(9) [suse man page]

TRACE_BLOCK_PLUG(9)						     Block IO						       TRACE_BLOCK_PLUG(9)

NAME

       trace_block_plug - keep operations requests in request queue

SYNOPSIS

       void trace_block_plug(struct request_queue * q);

ARGUMENTS

       q
	   request queue to plug

DESCRIPTION

       Plug the request queue q. Do not allow block operation requests to be sent to the device driver. Instead, accumulate requests in the queue
       to improve throughput performance of the block device.

AUTHORS

       Jason Baron <jbaron@redhat.com>
	   Author.

       William Cohen <wcohen@redhat.com>
	   Author.

COPYRIGHT

Kernel Hackers Manual 2.6.					     July 2010						       TRACE_BLOCK_PLUG(9)

lprm(1) 						      General Commands Manual							   lprm(1)

NAME

       lprm - Removes requests from the line printer spooling queue

SYNOPSIS

       lprm [-Pprinter] [-] [request_ID...] [user...]

       The lprm command removes one or more requests from a printer's spool queue.

OPTIONS

       Removes	all  requests  that a user owns.  If specified by a user with superuser authority, the spool queue is emptied entirely.  Specifies
       the queue associated with a specific printer; otherwise, the default printer or the value of the PRINTER variable  in  the  environment	is
       used.

DESCRIPTION

       Because the spooling directory is protected from users, using lprm is normally the way a user can remove a request.

       The lprm command without any arguments deletes the currently active request if it is owned by the user who invoked lprm.

       The - flag removes all requests from the user issuing the command. If a user who has superuser authority uses this flag, the spool queue is
       emptied entirely.  The owner is determined by the user's username and hostname on the machine where the lpr command was invoked.

       You can remove an individual request from a queue by specifying its request ID.	(You can obtain the request ID by using the lpq or  lpstat
       commands.)   Specifying	one or more users removes any requests queued belonging to those users.  This works only for a user with superuser
       authority.

       The lprm command is silent if there are no requests in the queue that match the request list.

       The lprm command kills an active daemon, if necessary, before removing any spooling files.  If a daemon is killed, a new one  is  automati-
       cally restarted upon completion of file removals.

NOTES

       Because race conditions are possible in the update of the lock file, the currently active request may be incorrectly identified.

DIAGNOSTICS

       The user tried to remove files that belong to another user.

EXAMPLES

       To  remove  a request from the default queue by specifying the request ID, enter: lprm 13 To remove a request from a specific queue, enter:
       lprm -Plp0 13 To remove from a specific queue a request from user guest, enter: lprm -Plp0 guest

FILES

       Printer description file.  Spool directories.  Daemon control files.  Data files specified in cf files.	 Temporary  copies  of	cf  files.
       Lock file used to obtain the process ID of the current daemon and the request ID of the currently active request.

SEE ALSO

       Commands:  lp(1), lpc(8), lpd(8), lpq(1), lpr(1), lpstat(1)

																	   lprm(1)