Michal Hocko 2932c8b050 mm, memory_hotplug: be more verbose for memory offline failures ... There is only very limited information printed when the memory offlining fails: [ 1984.506184] rac1 kernel: memory offlining [mem 0x82600000000-0x8267fffffff] failed due to signal backoff This tells us that the failure is triggered by the userspace intervention but it doesn't tell us much more about the underlying reason. It might be that the page migration failes repeatedly and the userspace timeout expires and send a signal or it might be some of the earlier steps (isolation, memory notifier) takes too long. If the migration failes then it would be really helpful to see which page that and its state. The same applies to the isolation phase. If we fail to isolate a page from the allocator then knowing the state of the page would be helpful as well. Dump the page state that fails to get isolated or migrated. This will tell us more about the failure and what to focus on during debugging. [akpm@linux-foundation.org: add missing printk arg] [mhocko@suse.com: tweak dump_page() `reason' text] Link: http://lkml.kernel.org/r/20181116083020.20260-6-mhocko@kernel.org Link: http://lkml.kernel.org/r/20181107101830.17405-6-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Oscar Salvador <osalvador@suse.de> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Baoquan He <bhe@redhat.com> Cc: Oscar Salvador <OSalvador@suse.com> Cc: William Kucharski <william.kucharski@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2018-12-28 12:11:46 -08:00
..
kasan	kasan: add SPDX-License-Identifier mark to source files	2018-12-28 12:11:44 -08:00
Kconfig	mm: remove CONFIG_HAVE_MEMBLOCK	2018-10-31 08:54:15 -07:00
Kconfig.debug	mm: clarify CONFIG_PAGE_POISONING and usage	2018-08-22 10:52:44 -07:00
Makefile	mm: remove nobootmem	2018-10-31 08:54:16 -07:00
backing-dev.c	blkcg: delay blkg destruction until after writeback has finished	2018-08-31 14:48:56 -06:00
balloon_compaction.c	…
cleancache.c	…
cma.c	kasan, mm, arm64: tag non slab memory allocated via pagealloc	2018-12-28 12:11:44 -08:00
cma.h	…
cma_debug.c	mm/cma: remove unsupported gfp_mask parameter from cma_alloc()	2018-08-17 16:20:32 -07:00
compaction.c	psi: pressure stall information for CPU, memory, and IO	2018-10-26 16:26:32 -07:00
debug.c	mm: lower the printk loglevel for __dump_page messages	2018-12-28 12:11:46 -08:00
debug_page_ref.c	…
dmapool.c	…
early_ioremap.c	…
fadvise.c	vfs: implement readahead(2) using POSIX_FADV_WILLNEED	2018-08-30 20:01:32 +02:00
failslab.c	…
filemap.c	vfs: rework data cloning infrastructure	2018-11-02 09:33:08 -07:00
frame_vector.c	…
frontswap.c	…
gup.c	mm/gup: finish consolidating error handling	2018-11-30 14:56:13 -08:00
gup_benchmark.c	mm/gup_benchmark.c: prevent integer overflow in ioctl	2018-10-31 08:54:12 -07:00
highmem.c	…
hmm.c	mm/hmm: invalidate device page table at start of invalidation	2018-10-31 08:54:12 -07:00
huge_memory.c	mm: thp: fix flags for pmd migration when split	2018-12-21 14:51:18 -08:00
hugetlb.c	hugetlbfs: call VM_BUG_ON_PAGE earlier in free_huge_page()	2018-12-14 15:05:45 -08:00
hugetlb_cgroup.c	…
hwpoison-inject.c	…
init-mm.c	…
internal.h	memblock: rename __free_pages_bootmem to memblock_free_pages	2018-10-31 08:54:16 -07:00
interval_tree.c	…
khugepaged.c	Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu	2018-12-04 07:52:30 +01:00
kmemleak-test.c	…
kmemleak.c	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
ksm.c	include/linux/compiler*.h: make compiler-*.h mutually exclusive	2018-08-22 17:31:34 -07:00
list_lru.c	mm/list_lru: introduce list_lru_shrink_walk_irq()	2018-08-17 16:20:32 -07:00
maccess.c	x86/fault: BUG() when uaccess helpers fault on kernel addresses	2018-09-03 15:12:09 +02:00
madvise.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
memblock.c	memblock: annotate memblock_is_reserved() with __init_memblock	2018-12-14 15:05:45 -08:00
memcontrol.c	mm: handle no memcg case in memcg_kmem_charge() properly	2018-11-03 10:09:37 -07:00
memfd.c	memfd: Convert memfd_tag_pins to XArray	2018-10-21 10:46:41 -04:00
memory-failure.c	dax: Fix unlock mismatch with updated API	2018-12-04 21:32:00 -08:00
memory.c	mm: Fix warning in insert_pfn()	2018-10-31 08:54:17 -07:00
memory_hotplug.c	mm, memory_hotplug: be more verbose for memory offline failures	2018-12-28 12:11:46 -08:00
mempolicy.c	Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask"	2018-12-08 10:26:20 -08:00
mempool.c	mm/mempool.c: add missing parameter description	2018-08-22 10:52:44 -07:00
memtest.c	…
migrate.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
mincore.c	xarray: Replace exceptional entries	2018-09-29 22:47:49 -04:00
mlock.c	dax: remove VM_MIXEDMAP for fsdax and device dax	2018-08-17 16:20:27 -07:00
mm_init.c	mm: access zone->node via zone_to_nid() and zone_set_nid()	2018-08-22 10:52:45 -07:00
mmap.c	mm: mmap: Allow for "high" userspace addresses	2018-12-10 18:42:17 +00:00
mmu_context.c	…
mmu_gather.c	mm: Replace call_rcu_sched() with call_rcu()	2018-11-27 09:21:46 -08:00
mmu_notifier.c	mm/mmu_notifier.c: remove mmu_notifier_synchronize()	2018-12-28 12:11:46 -08:00
mmzone.c	…
mprotect.c	…
mremap.c	mm: mremap: downgrade mmap_sem to read when shrinking	2018-10-26 16:26:35 -07:00
msync.c	…
nommu.c	mm/gup: cache dev_pagemap while pinning pages	2018-10-26 16:38:15 -07:00
oom_kill.c	Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-10-24 11:22:39 +01:00
page-writeback.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
page_alloc.c	mm, memory_hotplug: be more verbose for memory offline failures	2018-12-28 12:11:46 -08:00
page_counter.c	…
page_ext.c	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
page_idle.c	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
page_io.c	for-linus-20181102	2018-11-02 11:25:48 -07:00
page_isolation.c	…
page_owner.c	mm/page_owner: clamp read count to PAGE_SIZE	2018-12-28 12:11:46 -08:00
page_poison.c	virtio, vhost: fixes, tweaks	2018-11-01 14:42:49 -07:00
page_vma_mapped.c	mm/rmap: map_pte() was not handling private ZONE_DEVICE page properly	2018-10-31 08:54:11 -07:00
pagewalk.c	…
percpu-internal.h	…
percpu-km.c	…
percpu-stats.c	…
percpu-vm.c	…
percpu.c	Merge branch 'for-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu	2018-11-01 09:27:57 -07:00
pgtable-generic.c	x86/mm: Page size aware flush_tlb_mm_range()	2018-10-09 16:51:11 +02:00
process_vm_access.c	…
quicklist.c	…
readahead.c	mm/readahead.c: simplify get_next_ra_size()	2018-12-28 12:11:46 -08:00
rmap.c	mm/huge_memory: rename freeze_page() to unmap_page()	2018-11-30 14:56:14 -08:00
rodata_test.c	…
shmem.c	drm pull request for 4.21-rc1	2018-12-25 11:48:26 -08:00
slab.c	kasan, mm, arm64: tag non slab memory allocated via pagealloc	2018-12-28 12:11:44 -08:00
slab.h	kasan, mm: change hooks signatures	2018-12-28 12:11:43 -08:00
slab_common.c	mm, slab: remove unnecessary unlikely()	2018-12-28 12:11:46 -08:00
slob.c	…
slub.c	mm/slub.c: record final state of slub action in deactivate_slab()	2018-12-28 12:11:46 -08:00
sparse-vmemmap.c	mm: remove include/linux/bootmem.h	2018-10-31 08:54:16 -07:00
sparse.c	mm/hotplug: optimize clear_hwpoisoned_pages()	2018-12-28 12:11:46 -08:00
swap.c	mm: Replace spin_is_locked() with lockdep	2018-11-12 09:06:22 -08:00
swap_cgroup.c	…
swap_slots.c	mm, swap, get_swap_pages: use entry_size instead of cluster in parameter	2018-08-22 10:52:44 -07:00
swap_state.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
swapfile.c	mm/swapfile.c: use kvzalloc for swap_info_struct allocation	2018-11-18 10:15:09 -08:00
truncate.c	mm: cleancache: fix corruption on missed inode invalidation	2018-11-30 14:56:14 -08:00
usercopy.c	…
userfaultfd.c	userfaultfd: shmem: add i_size checks	2018-11-30 14:56:14 -08:00
util.c	kvfree(): fix misleading comment	2018-10-26 16:26:33 -07:00
vmacache.c	mm: get rid of vmacache_flush_all() entirely	2018-09-13 15:18:04 -10:00
vmalloc.c	vfree: add debug might_sleep()	2018-10-26 16:26:33 -07:00
vmpressure.c	…
vmscan.c	Merge drm/drm-next into drm-intel-next-queued	2018-11-20 13:14:08 +02:00
vmstat.c	mm/vmstat.c: fix NUMA statistics updates	2018-11-18 10:15:10 -08:00
workingset.c	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
z3fold.c	z3fold: fix possible reclaim races	2018-11-18 10:15:09 -08:00
zbud.c	…
zpool.c	…
zsmalloc.c	mm/zsmalloc.c: fix fall-through annotation	2018-10-26 16:26:35 -07:00
zswap.c	…