Allow the mempool to use the memalloc reserves when all else fails and the allocation context would otherwise allow it. Signed-off-by: Peter Zijlstra --- mm/mempool.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) Index: linux-2.6/mm/mempool.c =================================================================== --- linux-2.6.orig/mm/mempool.c +++ linux-2.6/mm/mempool.c @@ -14,6 +14,7 @@ #include #include #include +#include "internal.h" static void add_element(mempool_t *pool, void *element) { @@ -204,7 +205,7 @@ void * mempool_alloc(mempool_t *pool, gf void *element; unsigned long flags; wait_queue_t wait; - gfp_t gfp_temp; + gfp_t gfp_temp, gfp_orig = gfp_mask; might_sleep_if(gfp_mask & __GFP_WAIT); @@ -228,6 +229,15 @@ repeat_alloc: } spin_unlock_irqrestore(&pool->lock, flags); + /* if we really had right to the emergency reserves try those */ + if (gfp_to_alloc_flags(gfp_orig) & ALLOC_NO_WATERMARKS) { + if (gfp_temp & __GFP_NOMEMALLOC) { + gfp_temp &= ~(__GFP_NOMEMALLOC|__GFP_NOWARN); + goto repeat_alloc; + } else + gfp_temp |= __GFP_NOMEMALLOC|__GFP_NOWARN; + } + /* We must not sleep in the GFP_ATOMIC case */ if (!(gfp_mask & __GFP_WAIT)) return NULL; -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/