mm/vmalloc.c: add a schedule point to vmalloc()
It is not uncommon on busy servers to get stuck hundred of ms in
vmalloc() calls (like file descriptor expansions).
Add a cond_resched() to __vmalloc_area_node() to be gentle to
other tasks.
[akpm@linux-foundation.org: only do it for __GFP_WAIT, per David]
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index fdbb116..a3cad90 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1602,6 +1602,8 @@
goto fail;
}
area->pages[i] = page;
+ if (gfp_mask & __GFP_WAIT)
+ cond_resched();
}
if (map_vm_area(area, prot, &pages))
