When CONFIG_DEBUG_VM is enabled, this patch sets all the memory that is
returned by memblock_virt_alloc_try_nid_raw() to ones to ensure that no
places excpect zeroed memory.
Please fold this into the patch which introduces
memblock_virt_alloc_try_nid_raw.
OK
I am not sure CONFIG_DEBUG_VM is the
best config because that tends to be enabled quite often. Maybe
CONFIG_MEMBLOCK_DEBUG? Or even make it kernel command line parameter?
Initially, I did not want to make it CONFIG_MEMBLOCK_DEBUG because we
really benefit from this debugging code when VM debug is enabled, and
especially struct page debugging asserts which also depend on
CONFIG_DEBUG_VM.
However, now thinking about it, I will change it to
CONFIG_MEMBLOCK_DEBUG, and let users decide what other debugging configs
need to be enabled, as this is also OK.
Thank you,
Pasha
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