mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
lib/hashtable.c: add CONFIG_ENV_MIN_ENTRIES
This patch adds a new config parameter for adjusting the calculation of hash table size when importing a buffer. When importing a extremely small buffer (e.g. the default_environment) the old calculation generated a hash table which could hold at most the buffer content but no more entires. The new calculation add a fixed number of entries to the result to fit better for small import buffers. This amount may be configured by the user in board file to adjust the behaviour. Signed-off-by: Andreas Biemann <andreas.devel@googlemail.com>
This commit is contained in:
parent
f44a928e7e
commit
fc5fc76bda
1 changed files with 8 additions and 4 deletions
|
@ -45,6 +45,9 @@
|
|||
# include <linux/string.h>
|
||||
#endif
|
||||
|
||||
#ifndef CONFIG_ENV_MIN_ENTRIES /* minimum number of entries */
|
||||
#define CONFIG_ENV_MIN_ENTRIES 64
|
||||
#endif
|
||||
#ifndef CONFIG_ENV_MAX_ENTRIES /* maximum number of entries */
|
||||
#define CONFIG_ENV_MAX_ENTRIES 512
|
||||
#endif
|
||||
|
@ -647,13 +650,14 @@ int himport_r(struct hsearch_data *htab,
|
|||
* (CONFIG_ENV_SIZE). This heuristics will result in
|
||||
* unreasonably large numbers (and thus memory footprint) for
|
||||
* big flash environments (>8,000 entries for 64 KB
|
||||
* envrionment size), so we clip it to a reasonable value
|
||||
* (which can be overwritten in the board config file if
|
||||
* needed).
|
||||
* envrionment size), so we clip it to a reasonable value.
|
||||
* On the other hand we need to add some more entries for free
|
||||
* space when importing very small buffers. Both boundaries can
|
||||
* be overwritten in the board config file if needed.
|
||||
*/
|
||||
|
||||
if (!htab->table) {
|
||||
int nent = size / 8;
|
||||
int nent = CONFIG_ENV_MIN_ENTRIES + size / 8;
|
||||
|
||||
if (nent > CONFIG_ENV_MAX_ENTRIES)
|
||||
nent = CONFIG_ENV_MAX_ENTRIES;
|
||||
|
|
Loading…
Reference in a new issue