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-rw-r--r--mm/page-writeback.c18
1 files changed, 8 insertions, 10 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index d8c21e5a1bc9..7845462064f4 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -502,16 +502,6 @@ void throttle_vm_writeout(gfp_t gfp_mask)
502 long background_thresh; 502 long background_thresh;
503 long dirty_thresh; 503 long dirty_thresh;
504 504
505 if ((gfp_mask & (__GFP_FS|__GFP_IO)) != (__GFP_FS|__GFP_IO)) {
506 /*
507 * The caller might hold locks which can prevent IO completion
508 * or progress in the filesystem. So we cannot just sit here
509 * waiting for IO to complete.
510 */
511 congestion_wait(WRITE, HZ/10);
512 return;
513 }
514
515 for ( ; ; ) { 505 for ( ; ; ) {
516 get_dirty_limits(&background_thresh, &dirty_thresh, NULL, NULL); 506 get_dirty_limits(&background_thresh, &dirty_thresh, NULL, NULL);
517 507
@@ -525,6 +515,14 @@ void throttle_vm_writeout(gfp_t gfp_mask)
525 global_page_state(NR_WRITEBACK) <= dirty_thresh) 515 global_page_state(NR_WRITEBACK) <= dirty_thresh)
526 break; 516 break;
527 congestion_wait(WRITE, HZ/10); 517 congestion_wait(WRITE, HZ/10);
518
519 /*
520 * The caller might hold locks which can prevent IO completion
521 * or progress in the filesystem. So we cannot just sit here
522 * waiting for IO to complete.
523 */
524 if ((gfp_mask & (__GFP_FS|__GFP_IO)) != (__GFP_FS|__GFP_IO))
525 break;
528 } 526 }
529} 527}
530 528