From 89cee8b1cbb9dac40c92ef1968aea2b45f82fd18 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 13 Dec 2005 23:14:27 -0800 Subject: [IPV4]: Safer reassembly Another spin of Herbert Xu's "safer ip reassembly" patch for 2.6.16. (The original patch is here: http://marc.theaimsgroup.com/?l=linux-netdev&m=112281936522415&w=2 and my only contribution is to have tested it.) This patch (optionally) does additional checks before accepting IP fragments, which can greatly reduce the possibility of reassembling fragments which originated from different IP datagrams. Signed-off-by: Herbert Xu Signed-off-by: Arthur Kepner Signed-off-by: David S. Miller --- include/linux/sysctl.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sysctl.h') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 4be34ef8c2f7..93fa765e47d3 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -390,6 +390,7 @@ enum NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR=109, NET_TCP_CONG_CONTROL=110, NET_TCP_ABC=111, + NET_IPV4_IPFRAG_MAX_DIST=112, }; enum { -- cgit v1.2.2 From 312c004d36ce6c739512bac83b452f4c20ab1f62 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 16 Nov 2005 09:00:00 +0100 Subject: [PATCH] driver core: replace "hotplug" by "uevent" Leave the overloaded "hotplug" word to susbsystems which are handling real devices. The driver core does not "plug" anything, it just exports the state to userspace and generates events. Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman --- include/linux/sysctl.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/sysctl.h') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 4be34ef8c2f7..501564264518 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -124,7 +124,7 @@ enum KERN_OVERFLOWUID=46, /* int: overflow UID */ KERN_OVERFLOWGID=47, /* int: overflow GID */ KERN_SHMPATH=48, /* string: path to shm fs */ - KERN_HOTPLUG=49, /* string: path to hotplug policy agent */ + KERN_HOTPLUG=49, /* string: path to uevent helper (deprecated) */ KERN_IEEE_EMULATION_WARNINGS=50, /* int: unimplemented ieee instructions */ KERN_S390_USER_DEBUG_LOGGING=51, /* int: dumps of user faults */ KERN_CORE_USES_PID=52, /* int: use core or core.%pid */ -- cgit v1.2.2 From 9d0243bca345d5ce25d3f4b74b7facb3a6df1232 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Sun, 8 Jan 2006 01:00:39 -0800 Subject: [PATCH] drop-pagecache Add /proc/sys/vm/drop_caches. When written to, this will cause the kernel to discard as much pagecache and/or reclaimable slab objects as it can. THis operation requires root permissions. It won't drop dirty data, so the user should run `sync' first. Caveats: a) Holds inode_lock for exorbitant amounts of time. b) Needs to be taught about NUMA nodes: propagate these all the way through so the discarding can be controlled on a per-node basis. This is a debugging feature: useful for getting consistent results between filesystem benchmarks. We could possibly put it under a config option, but it's less than 300 bytes. Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sysctl.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sysctl.h') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index a9b80fc7f0f3..4cd267fe87ec 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -180,6 +180,7 @@ enum VM_VFS_CACHE_PRESSURE=26, /* dcache/icache reclaim pressure */ VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */ VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */ + VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */ }; -- cgit v1.2.2 From 8ad4b1fb8205340dba16b63467bb23efc27264d6 Mon Sep 17 00:00:00 2001 From: Rohit Seth Date: Sun, 8 Jan 2006 01:00:40 -0800 Subject: [PATCH] Make high and batch sizes of per_cpu_pagelists configurable As recently there has been lot of traffic on the right values for batch and high water marks for per_cpu_pagelists. This patch makes these two variables configurable through /proc interface. A new tunable /proc/sys/vm/percpu_pagelist_fraction is added. This entry controls the fraction of pages at most in each zone that are allocated for each per cpu page list. The min value for this is 8. It means that we don't allow more than 1/8th of pages in each zone to be allocated in any single per_cpu_pagelist. The batch value of each per cpu pagelist is also updated as a result. It is set to pcp->high/4. The upper limit of batch is (PAGE_SHIFT * 8) Signed-off-by: Rohit Seth Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sysctl.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sysctl.h') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 4cd267fe87ec..7f472127b7b5 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -181,6 +181,7 @@ enum VM_LEGACY_VA_LAYOUT=27, /* legacy/compatibility virtual address space layout */ VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */ VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */ + VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */ }; -- cgit v1.2.2 From 1743660b911bfb849b1fb33830522254561b9f9b Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Wed, 18 Jan 2006 17:42:32 -0800 Subject: [PATCH] Zone reclaim: proc override proc support for zone reclaim This patch creates a proc entry /proc/sys/vm/zone_reclaim_mode that may be used to override the automatic determination of the zone reclaim made on bootup. Signed-off-by: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/sysctl.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/sysctl.h') diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 7f472127b7b5..8352a7ce5895 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -182,6 +182,7 @@ enum VM_SWAP_TOKEN_TIMEOUT=28, /* default time for token time out */ VM_DROP_PAGECACHE=29, /* int: nuke lots of pagecache */ VM_PERCPU_PAGELIST_FRACTION=30,/* int: fraction of pages in each percpu_pagelist */ + VM_ZONE_RECLAIM_MODE=31,/* reclaim local zone memory before going off node */ }; -- cgit v1.2.2