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Make YAFFS_N_TEMP_BUFFERS a configurable parameter.
author Ross Younger <wry@ecoscentric.com>
date Wed, 02 Sep 2009 14:29:32 +0100
parents 79e24d9d451d
children 16de60f90faa
comparison
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302:79e24d9d451d 303:ed45fbf83981
230 recommended as a good compromise; increasing the number consumes more RAM but may 230 recommended as a good compromise; increasing the number consumes more RAM but may
231 improve performance. 231 improve performance.
232 Set to 0 to disable these caches altogether. 232 Set to 0 to disable these caches altogether.
233 <emphasis>This setting is a global default and may be 233 <emphasis>This setting is a global default and may be
234 changed by a mount-time option.</emphasis></para></listitem></varlistentry> 234 changed by a mount-time option.</emphasis></para></listitem></varlistentry>
235 <varlistentry><term><constant>CYGNUM_FS_YAFFS_TEMP_BUFFERS</constant></term>
236 <listitem><para>
237 YAFFS requires temporary buffers in many places throughout the code.
238 To avoid the overhead of a dynamic malloc every time, a number of
239 buffers are preallocated at mount time. This setting controls how many;
240 should it not prove enough, YAFFS will call maloc on demand as required.
241 The default setting is 6; most users will not need to change it.
242 </para></listitem></varlistentry>
235 <varlistentry><term><constant>CYGNUM_FS_YAFFS_TRACEMASK</constant></term><listitem><para>This 243 <varlistentry><term><constant>CYGNUM_FS_YAFFS_TRACEMASK</constant></term><listitem><para>This
236 is a 32-bit bitfield which controls diagnostic output. The bit definitions 244 is a 32-bit bitfield which controls diagnostic output. The bit definitions
237 are found in <filename>yportenv.h</filename>; changing this setting tends to only be useful 245 are found in <filename>yportenv.h</filename>; changing this setting tends to only be useful
238 if you wish to debug YAFFS itself.</para></listitem></varlistentry> 246 if you wish to debug YAFFS itself.</para></listitem></varlistentry>
239 <varlistentry><term><constant>CYGPKG_FS_YAFFS_CFLAGS_ADD</constant></term> 247 <varlistentry><term><constant>CYGPKG_FS_YAFFS_CFLAGS_ADD</constant></term>