tree 7f99ca473ffc79baf0cb96b6dfb33de831af494f
parent 8bd6026e88cb2eb1e60ee40c7a1a0786b2db6623
author Jim Cromie <jim.cromie@gmail.com> 1324332787 -0500
committer Greg Kroah-Hartman <gregkh@suse.de> 1327438135 -0800

dynamic_debug: enlarge command/query write buffer

Current query write buffer is 256 bytes, on stack.  In comparison, the
ddebug_query boot-arg is 1024.  Allocate the buffer off heap, and
enlarge it to 4096 bytes, big enough for ~100 queries (at 40 bytes
each), and error out if not.  This makes it play nicely with large
query sets (to be added later).  The buffer should be enough for most
uses, and others should probably be split into subsets.

[jbaron@redhat.com: changed USER_BUF_PAGE from 4095 -> 4096 ]
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>