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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-10-29 10:32:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-29 10:32:32 +0100 |
| commit | 8203efb3c612743fecb1ed67cf1daf9d9c127462 (patch) | |
| tree | 56eabd6da3e36baa2aa4f6a69280e49a381ad5dc | |
| parent | udp: RCU handling for Unicast packets. (diff) | |
| download | linux-8203efb3c612743fecb1ed67cf1daf9d9c127462.tar.xz linux-8203efb3c612743fecb1ed67cf1daf9d9c127462.zip | |
udp: calculate udp_mem based on low memory instead of all memory
This patch mimics commit 57413ebc4e0f1e471a3b4db4aff9a85c083d090e
(tcp: calculate tcp_mem based on low memory instead of all memory)
The udp_mem array which contains limits on the total amount of memory
used by UDP sockets is calculated based on nr_all_pages. On a 32 bits
x86 system, we should base this on the number of lowmem pages.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/udp.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 0ea974bf7962..5ba03401b914 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -81,6 +81,8 @@ #include <asm/uaccess.h> #include <asm/ioctls.h> #include <linux/bootmem.h> +#include <linux/highmem.h> +#include <linux/swap.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/module.h> @@ -1751,15 +1753,16 @@ void __init udp_table_init(struct udp_table *table) void __init udp_init(void) { - unsigned long limit; + unsigned long nr_pages, limit; udp_table_init(&udp_table); /* Set the pressure threshold up by the same strategy of TCP. It is a * fraction of global memory that is up to 1/2 at 256 MB, decreasing * toward zero with the amount of memory, with a floor of 128 pages. */ - limit = min(nr_all_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT); - limit = (limit * (nr_all_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11); + nr_pages = totalram_pages - totalhigh_pages; + limit = min(nr_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT); + limit = (limit * (nr_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11); limit = max(limit, 128UL); sysctl_udp_mem[0] = limit / 4 * 3; sysctl_udp_mem[1] = limit; |