Yinghai Lu c7c94a6913 mm: sparse: fix usemap allocation above node descriptor section ... commit 99ab7b1944 upstream. After commit f5bf18fa22 ("bootmem/sparsemem: remove limit constraint in alloc_bootmem_section"), usemap allocations may easily be placed outside the optimal section that holds the node descriptor, even if there is space available in that section. This results in unnecessary hotplug dependencies that need to have the node unplugged before the section holding the usemap. The reason is that the bootmem allocator doesn't guarantee a linear search starting from the passed allocation goal but may start out at a much higher address absent an upper limit. Fix this by trying the allocation with the limit at the section end, then retry without if that fails. This keeps the fix from f5bf18fa22 of not panicking if the allocation does not fit in the section, but still makes sure to try to stay within the section at first. [rewritten massively by Johannes to apply to 3.4] Change-Id: Ie40e51558b3abcaf0c0e72846928b84fe17f055a Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-10-29 23:12:12 +08:00
..
backing-dev.c	bdi: use deferable timer for sync_supers task	2013-02-27 18:16:50 -08:00
bootmem.c	mm: sparse: fix usemap allocation above node descriptor section	2016-10-29 23:12:12 +08:00
bounce.c
cleancache.c
compaction.c	cma: fix watermark checking	2013-03-15 17:06:38 -07:00
debug-pagealloc.c
dmapool.c
fadvise.c
failslab.c
filemap.c	fs: introduce inode operation ->update_time	2015-07-13 11:17:49 -07:00
filemap_xip.c	fs: introduce inode operation ->update_time	2015-07-13 11:17:49 -07:00
fremap.c
highmem.c
huge_memory.c
hugetlb.c
hwpoison-inject.c
init-mm.c
internal.h	cma: fix watermark checking	2013-03-15 17:06:38 -07:00
Kconfig	mm: mmzone: MIGRATE_CMA migration type added	2013-02-27 18:14:01 -08:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c
maccess.c
madvise.c	mm: add a field to store names for private anonymous memory	2013-10-11 10:02:06 -07:00
Makefile	mm: compaction: export some of the functions	2013-02-27 18:13:58 -08:00
memblock.c
memcontrol.c
memory-failure.c	mm: page_isolation: MIGRATE_CMA isolation functions added	2013-02-27 18:14:02 -08:00
memory.c	mm: Use correct define for CMA features	2013-03-07 15:23:58 -08:00
memory_hotplug.c	mm: page_isolation: MIGRATE_CMA isolation functions added	2013-02-27 18:14:02 -08:00
mempolicy.c	mm: add a field to store names for private anonymous memory	2013-10-11 10:02:06 -07:00
mempool.c
migrate.c
mincore.c
mlock.c	mm: reorder can_do_mlock to fix audit denial	2015-06-16 23:08:46 -07:00
mm_init.c
mmap.c	mm: add a field to store names for private anonymous memory	2013-10-11 10:02:06 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	mm: add a field to store names for private anonymous memory	2013-10-11 10:02:06 -07:00
mremap.c
msync.c
nobootmem.c
nommu.c
oom_kill.c	mm, oom: make dump_tasks public	2014-11-18 15:13:25 -08:00
page-writeback.c
page_alloc.c	mm: workaround for widevine playback failed	2013-05-22 07:57:36 +00:00
page_cgroup.c
page_io.c
page_isolation.c	mm: page_isolation: MIGRATE_CMA isolation functions added	2013-02-27 18:14:02 -08:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c
prio_tree.c
process_vm_access.c
quicklist.c
readahead.c
rmap.c
shmem.c
slab.c
slob.c
slub.c	slub: fix a memory leak in get_partial_node()	2013-03-15 17:09:26 -07:00
sparse-vmemmap.c
sparse.c
swap.c
swap_state.c
swapfile.c
thrash.c
truncate.c
util.c	nick kvfree() from apparmor	2014-11-18 15:13:23 -08:00
vmalloc.c
vmscan.c
vmstat.c	mm: make counts of CMA free pages correct	2013-03-07 15:23:58 -08:00