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| author | Dan Williams <dan.j.williams@intel.com> | 2017-02-04 22:47:31 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-14 23:25:32 (GMT) |
| commit | cd755677d9444d718ac04a693523c9ff5a7f79ec (patch) | |
| tree | 6a81d843c350e8689cdac6e1f33b44e639bc09fe /drivers/md/dm-rq.c | |
| parent | ebffa7bc77c88218a484a47ab61822943539b252 (diff) | |
| download | linux-cd755677d9444d718ac04a693523c9ff5a7f79ec.tar.xz | |
libnvdimm, pfn: fix memmap reservation size versus 4K alignment
commit bfb34527a32a1a576d9bfb7026d3ab0369a6cd60 upstream.
When vmemmap_populate() allocates space for the memmap it does so in 2MB
sized chunks. The libnvdimm-pfn driver incorrectly accounts for this
when the alignment of the device is set to 4K. When this happens we
trigger memory allocation failures in altmap_alloc_block_buf() and
trigger warnings of the form:
WARNING: CPU: 0 PID: 3376 at arch/x86/mm/init_64.c:656 arch_add_memory+0xe4/0xf0
[..]
Call Trace:
dump_stack+0x86/0xc3
__warn+0xcb/0xf0
warn_slowpath_null+0x1d/0x20
arch_add_memory+0xe4/0xf0
devm_memremap_pages+0x29b/0x4e0
Fixes: 315c562536c4 ("libnvdimm, pfn: add 'align' attribute, default to HPAGE_SIZE")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-rq.c')
0 files changed, 0 insertions, 0 deletions