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| author |   Dan Williams <dan.j.williams@intel.com> | 2017-02-04 14:47:31 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-02-04 14:47:31 -0800 |
| commit | bfb34527a32a1a576d9bfb7026d3ab0369a6cd60 (patch) | |
| tree | db4d58c52d766eeb0c87cd6dba005839de933ede /Documentation | |
| parent | acpi, nfit: fix acpi_nfit_flush_probe() crash (diff) | |
| download | linux-dev-bfb34527a32a1a576d9bfb7026d3ab0369a6cd60.tar.xz linux-dev-bfb34527a32a1a576d9bfb7026d3ab0369a6cd60.zip | |
libnvdimm, pfn: fix memmap reservation size versus 4K alignment
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")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions