From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx> Subject: mm/vmalloc: remove gfpflags_allow_blocking() check Get rid of gfpflags_allow_blocking() check from the vmalloc() path as it is supposed to be sleepable anyway. Thus remove it from the alloc_vmap_area() as well as from the vm_area_alloc_pages(). Link: https://lkml.kernel.org/r/20210707182639.31282-2-urezki@xxxxxxxxx Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx> Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx> Cc: Nicholas Piggin <npiggin@xxxxxxxxx> Cc: Hillf Danton <hdanton@xxxxxxxx> Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/vmalloc.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) --- a/mm/vmalloc.c~mm-vmalloc-remove-gfpflags_allow_blocking-check +++ a/mm/vmalloc.c @@ -1479,6 +1479,7 @@ static struct vmap_area *alloc_vmap_area int node, gfp_t gfp_mask) { struct vmap_area *va; + unsigned long freed; unsigned long addr; int purged = 0; int ret; @@ -1542,13 +1543,12 @@ overflow: goto retry; } - if (gfpflags_allow_blocking(gfp_mask)) { - unsigned long freed = 0; - blocking_notifier_call_chain(&vmap_notify_list, 0, &freed); - if (freed > 0) { - purged = 0; - goto retry; - } + freed = 0; + blocking_notifier_call_chain(&vmap_notify_list, 0, &freed); + + if (freed > 0) { + purged = 0; + goto retry; } if (!(gfp_mask & __GFP_NOWARN) && printk_ratelimit()) @@ -2838,9 +2838,7 @@ vm_area_alloc_pages(gfp_t gfp, int nid, for (i = 0; i < (1U << order); i++) pages[nr_allocated + i] = page + i; - if (gfpflags_allow_blocking(gfp)) - cond_resched(); - + cond_resched(); nr_allocated += 1U << order; } _
