table of contents
| ALLOC_CONTIG_RANGE(9) | Memory Management in Linux | ALLOC_CONTIG_RANGE(9) |
NAME¶
alloc_contig_range - - tries to allocate given range of pages
SYNOPSIS¶
int alloc_contig_range(unsigned long start, unsigned long end, unsigned migratetype, gfp_t gfp_mask);
ARGUMENTS¶
start
start PFN to allocate
end
one-past-the-last PFN to allocate
migratetype
migratetype of the underlaying pageblocks (either
#MIGRATE_MOVABLE or #MIGRATE_CMA). All pageblocks in range must have the same
migratetype and it must be either of the two.
gfp_mask
GFP mask to use during compaction
DESCRIPTION¶
The PFN range does not have to be pageblock or MAX_ORDER_NR_PAGES aligned, however it's the caller's responsibility to guarantee that we are the only thread that changes migrate type of pageblocks the pages fall in.
The PFN range must belong to a single zone.
Returns zero on success or negative error code. On success all pages which PFN is in [start, end) are allocated for the caller and need to be freed with free_contig_range.
COPYRIGHT¶
| June 2024 | Kernel Hackers Manual 3.10 |