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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 22:27:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 22:27:08 -0700 |
| commit | 9f45efb9286268e01d5022d34a58a68f53ca3072 (patch) | |
| tree | ac152f5ab7bf104ee2c4ad3a596ce0d2595f1d59 /Documentation/admin-guide | |
| parent | dc502142b65b9e31eb90ab4344b3acadb2698317 (diff) | |
| parent | 4932381ee2a77a21641009149722e1bb92bd99e2 (diff) | |
| download | linux-9f45efb9286268e01d5022d34a58a68f53ca3072.tar.bz2 | |
Merge branch 'akpm' (patches from Andrew)
Merge misc updates from Andrew Morton:
- a few hotfixes
- various misc updates
- ocfs2 updates
- most of MM
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (108 commits)
mm, memory_hotplug: move movable_node to the hotplug proper
mm, memory_hotplug: drop CONFIG_MOVABLE_NODE
mm, memory_hotplug: drop artificial restriction on online/offline
mm: memcontrol: account slab stats per lruvec
mm: memcontrol: per-lruvec stats infrastructure
mm: memcontrol: use generic mod_memcg_page_state for kmem pages
mm: memcontrol: use the node-native slab memory counters
mm: vmstat: move slab statistics from zone to node counters
mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare()
mm/zswap.c: improve a size determination in zswap_frontswap_init()
mm/zswap.c: delete an error message for a failed memory allocation in zswap_pool_create()
mm/swapfile.c: sort swap entries before free
mm/oom_kill: count global and memory cgroup oom kills
mm: per-cgroup memory reclaim stats
mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects
mm: kmemleak: factor object reference updating out of scan_block()
mm: kmemleak: slightly reduce the size of some structures on 64-bit architectures
mm, mempolicy: don't check cpuset seqlock where it doesn't matter
mm, cpuset: always use seqlock when changing task's nodemask
mm, mempolicy: simplify rebinding mempolicies when updating cpusets
...
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index aa1d4409fe0a..d9c171ce4190 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2315,8 +2315,11 @@ that the amount of memory usable for all allocations is not too small. - movable_node [KNL] Boot-time switch to enable the effects - of CONFIG_MOVABLE_NODE=y. See mm/Kconfig for details. + movable_node [KNL] Boot-time switch to make hotplugable memory + NUMA nodes to be movable. This means that the memory + of such nodes will be usable only for movable + allocations which rules out almost all kernel + allocations. Use with caution! MTD_Partition= [MTD] Format: <name>,<region-number>,<size>,<offset> @@ -3772,8 +3775,14 @@ slab_nomerge [MM] Disable merging of slabs with similar size. May be necessary if there is some reason to distinguish - allocs to different slabs. Debug options disable - merging on their own. + allocs to different slabs, especially in hardened + environments where the risk of heap overflows and + layout control by attackers can usually be + frustrated by disabling merging. This will reduce + most of the exposure of a heap attack to a single + cache (risks via metadata attacks are mostly + unchanged). Debug options disable merging on their + own. For more information see Documentation/vm/slub.txt. slab_max_order= [MM, SLAB] |