From 8203efb3c612743fecb1ed67cf1daf9d9c127462 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 29 Oct 2008 02:32:32 -0700 Subject: [PATCH] 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 Signed-off-by: David S. Miller --- net/ipv4/udp.c | 9 ++++++--- 1 file 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 #include #include +#include +#include #include #include #include @@ -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; -- 2.20.1