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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Gregory Price wrote: > Capacity is stranded when CFMWS regions are not aligned to block size. > On x86, block size increases with capacity (2G blocks @ 64G capacity). > > Use CFMWS base/size to report memory block size alignment advice. > > Suggested-by: Dan Williams > Signed-off-by: Gregory Price > Acked-by: Mike Rapoport (Microsoft) > Acked-by: David Hildenbrand > Acked-by: Dan Williams > Tested-by: Fan Ni > --- > drivers/acpi/numa/srat.c | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c > index 59fffe34c9d0..7526119fe945 100644 > --- a/drivers/acpi/numa/srat.c > +++ b/drivers/acpi/numa/srat.c > @@ -14,6 +14,7 @@ > #include > #include > #include > +#include > #include > #include > #include > @@ -425,13 +426,22 @@ static int __init acpi_parse_cfmws(union acpi_subtable_headers *header, > { > struct acpi_cedt_cfmws *cfmws; > int *fake_pxm = arg; > - u64 start, end; > + u64 start, end, align; > int node; > > cfmws = (struct acpi_cedt_cfmws *)header; > start = cfmws->base_hpa; > end = cfmws->base_hpa + cfmws->window_size; > > + /* Align memblock size to CFMW regions if possible */ > + align = 1UL << __ffs(start | end); > + if (align >= SZ_256M) { > + if (memory_block_advise_max_size(align) < 0) > + pr_warn("CFMWS: memblock size advise failed\n"); I wonder if it would be good to print the return value here so the user knows why this failed? But either way. Reviewed-by: Ira Weiny > + } else { > + pr_err("CFMWS: [BIOS BUG] base/size alignment violates spec\n"); > + } > + > /* > * The SRAT may have already described NUMA details for all, > * or a portion of, this CFMWS HPA range. Extend the memblks > -- > 2.47.1 > >