| Date | Sun, 05 Feb 2012 23:09:52 +0100 | From | Willy Tarreau <> | Subject | [PATCH 03/91] set memory ranges in N_NORMAL_MEMORY when onlined |
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2.6.27-longterm review patch. If anyone has any objections, please let us know.
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commit d9b41e0b54fd7e164daf1e9c539c1070398aa02e upstream.
When a DISCONTIGMEM memory range is brought online as a NUMA node, it also needs to have its bet set in N_NORMAL_MEMORY. This is necessary for generic kernel code that utilizes N_NORMAL_MEMORY as a subset of N_ONLINE for memory savings.
These types of hacks can hopefully be removed once DISCONTIGMEM is either removed or abstracted away from CONFIG_NUMA.
Fixes a panic in the slub code which only initializes structures for N_NORMAL_MEMORY to save memory:
Backtrace: [<000000004021c938>] add_partial+0x28/0x98 [<000000004021faa0>] __slab_free+0x1d0/0x1d8 [<000000004021fd04>] kmem_cache_free+0xc4/0x128 [<000000004033bf9c>] ida_get_new_above+0x21c/0x2c0 [<00000000402a8980>] sysfs_new_dirent+0xd0/0x238 [<00000000402a974c>] create_dir+0x5c/0x168 [<00000000402a9ab0>] sysfs_create_dir+0x98/0x128 [<000000004033d6c4>] kobject_add_internal+0x114/0x258 [<000000004033d9ac>] kobject_add_varg+0x7c/0xa0 [<000000004033df20>] kobject_add+0x50/0x90 [<000000004033dfb4>] kobject_create_and_add+0x54/0xc8 [<00000000407862a0>] cgroup_init+0x138/0x1f0 [<000000004077ce50>] start_kernel+0x5a0/0x840 [<000000004011fa3c>] start_parisc+0xa4/0xb8 [<00000000404bb034>] packet_ioctl+0x16c/0x208 [<000000004049ac30>] ip_mroute_setsockopt+0x260/0xf20
Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- arch/parisc/mm/init.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
Index: longterm-2.6.27/arch/parisc/mm/init.c =================================================================== --- longterm-2.6.27.orig/arch/parisc/mm/init.c 2012-02-05 22:34:34.989914901 +0100 +++ longterm-2.6.27/arch/parisc/mm/init.c 2012-02-05 22:34:35.362915231 +0100 @@ -265,8 +265,10 @@ } memset(pfnnid_map, 0xff, sizeof(pfnnid_map)); - for (i = 0; i < npmem_ranges; i++) + for (i = 0; i < npmem_ranges; i++) { + node_set_state(i, N_NORMAL_MEMORY); node_set_online(i); + } #endif /*
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