X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Ftxg.c;h=e14bff269b3e77a5c3421255f7a77ba89f2aebb5;hb=15fd274973be58f2851bf9d8e8d913b4c10151a6;hp=c234567d7e5295f6437f8b417f7b5d3c4c3ce130;hpb=b876dac776afc8ea2c598eac53b9903de01c6172;p=zfs.git

diff --git a/module/zfs/txg.c b/module/zfs/txg.c
index c234567..e14bff2 100644
--- a/module/zfs/txg.c
+++ b/module/zfs/txg.c
@@ -349,7 +349,7 @@ txg_dispatch_callbacks(dsl_pool_t *dp, uint64_t txg)
 			    TASKQ_THREADS_CPU_PCT | TASKQ_PREPOPULATE);
 		}
 
-		cb_list = kmem_alloc(sizeof (list_t), KM_SLEEP);
+		cb_list = kmem_alloc(sizeof (list_t), KM_PUSHPAGE);
 		list_create(cb_list, sizeof (dmu_tx_callback_t),
 		    offsetof(dmu_tx_callback_t, dcb_node));
 
@@ -382,6 +382,15 @@ txg_sync_thread(dsl_pool_t *dp)
 	callb_cpr_t cpr;
 	uint64_t start, delta;
 
+#ifdef _KERNEL
+	/*
+	 * Annotate this process with a flag that indicates that it is
+	 * unsafe to use KM_SLEEP during memory allocations due to the
+	 * potential for a deadlock.  KM_PUSHPAGE should be used instead.
+	 */
+	current->flags |= PF_NOFS;
+#endif /* _KERNEL */
+
 	txg_thread_enter(tx, &cpr);
 
 	start = delta = 0;