diff options
Diffstat (limited to 'lib/hashtable.c')
| -rw-r--r-- | lib/hashtable.c | 32 |
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 */ } |