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-rw-r--r--lib/hashtable.c32
1 files changed, 23 insertions, 9 deletions
diff --git a/lib/hashtable.c b/lib/hashtable.c
index 2f3b5c8..b747f1f 100644
--- a/lib/hashtable.c
+++ b/lib/hashtable.c
@@ -45,6 +45,10 @@
# include <linux/string.h>
#endif
+#ifndef CONFIG_ENV_MAX_ENTRIES /* maximum number of entries */
+#define CONFIG_ENV_MAX_ENTRIES 512
+#endif
+
#include "search.h"
/*
@@ -636,15 +640,23 @@ int himport_r(struct hsearch_data *htab,
* table size is based on heuristics: in a sample of some 70+
* existing systems we found an average size of 39+ bytes per entry
* in the environment (for the whole key=value pair). Assuming a
- * size of 7 per entry (= safety factor of >5) should provide enough
- * safety margin for any existing environment definitons and still
+ * size of 8 per entry (= safety factor of ~5) should provide enough
+ * safety margin for any existing environment definitions and still
* allow for more than enough dynamic additions. Note that the
* "size" argument is supposed to give the maximum enviroment size
- * (CONFIG_ENV_SIZE).
+ * (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).
*/
if (!htab->table) {
- int nent = size / 7;
+ int nent = size / 8;
+
+ if (nent > CONFIG_ENV_MAX_ENTRIES)
+ nent = CONFIG_ENV_MAX_ENTRIES;
debug("Create Hash Table: N=%d\n", nent);
@@ -705,17 +717,19 @@ int himport_r(struct hsearch_data *htab,
hsearch_r(e, ENTER, &rv, htab);
if (rv == NULL) {
- printf("himport_r: can't insert \"%s=%s\" into hash table\n", name, value);
+ printf("himport_r: can't insert \"%s=%s\" into hash table\n",
+ name, value);
return 0;
}
- debug("INSERT: %p ==> name=\"%s\" value=\"%s\"\n", rv, name,
- value);
- debug(" table = %p, size = %d, filled = %d\n", htab,
- htab->size, htab->filled);
+ debug("INSERT: table %p, filled %d/%d rv %p ==> name=\"%s\" value=\"%s\"\n",
+ htab, htab->filled, htab->size,
+ rv, name, value);
} while ((dp < data + size) && *dp); /* size check needed for text */
/* without '\0' termination */
+ debug("INSERT: free(data = %p)\n", data);
free(data);
+ debug("INSERT: done\n");
return 1; /* everything OK */
}