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| author | Tim Bird <tim.bird@am.sony.com> | 2012-05-23 13:33:35 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-24 00:28:21 -0400 |
| commit | 31fe62b9586643953f0c0c37a6357dafc69034e2 (patch) | |
| tree | 69f9990423969df4ecbaea9d1e8de748284bea5e /include | |
| parent | d0a24a3516fb36023bef28d2355fa34e7f32029f (diff) | |
| download | linux-stable-31fe62b9586643953f0c0c37a6357dafc69034e2.tar.gz linux-stable-31fe62b9586643953f0c0c37a6357dafc69034e2.tar.bz2 linux-stable-31fe62b9586643953f0c0c37a6357dafc69034e2.zip | |
mm: add a low limit to alloc_large_system_hash
UDP stack needs a minimum hash size value for proper operation and also
uses alloc_large_system_hash() for proper NUMA distribution of its hash
tables and automatic sizing depending on available system memory.
On some low memory situations, udp_table_init() must ignore the
alloc_large_system_hash() result and reallocs a bigger memory area.
As we cannot easily free old hash table, we leak it and kmemleak can
issue a warning.
This patch adds a low limit parameter to alloc_large_system_hash() to
solve this problem.
We then specify UDP_HTABLE_SIZE_MIN for UDP/UDPLite hash table
allocation.
Reported-by: Mark Asselstine <mark.asselstine@windriver.com>
Reported-by: Tim Bird <tim.bird@am.sony.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bootmem.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 66d3e954eb6c..1a0cd270bb7a 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -154,7 +154,8 @@ extern void *alloc_large_system_hash(const char *tablename, int flags, unsigned int *_hash_shift, unsigned int *_hash_mask, - unsigned long limit); + unsigned long low_limit, + unsigned long high_limit); #define HASH_EARLY 0x00000001 /* Allocating during early boot? */ #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min |