On Wed, 24 Mar 2021, Matthew Wilcox (Oracle) wrote: > If we're trying to allocate 4MB of memory, the table will be 8KiB in size > (1024 pointers * 8 bytes per pointer), which can usually be satisfied > by a kmalloc (which is significantly faster). Instead of changing this > open-coded implementation, just use kvmalloc(). > > This improves the allocation speed of vmalloc(4MB) by approximately > 5% in our benchmark. It's still dominated by the 1024 calls to > alloc_pages_node(), which will be the subject of a later patch. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
