29 Oct
2020
29 Oct
'20
7:02 a.m.
On Thu, 29 Oct 2020 00:16:22 +0000 John Stultz wrote:
+#define HIGH_ORDER_GFP (((GFP_HIGHUSER | __GFP_ZERO | __GFP_NOWARN \
| __GFP_NORETRY) & ~__GFP_RECLAIM) \| __GFP_COMP)+#define LOW_ORDER_GFP (GFP_HIGHUSER | __GFP_ZERO | __GFP_COMP) +static gfp_t order_flags[] = {HIGH_ORDER_GFP, LOW_ORDER_GFP, LOW_ORDER_GFP}; +static const unsigned int orders[] = {8, 4, 0}; +#define NUM_ORDERS ARRAY_SIZE(orders)
A two-line comment helps much understand the ORDERs above if it specifies the reasons behind the detour to HPAGE_PMD_ORDER and PAGE_ALLOC_COSTLY_ORDER.