Switch KM_SLEEP to KM_PUSHPAGE

This warning indicates the incorrect use of KM_SLEEP in a call
path which must use KM_PUSHPAGE to avoid deadlocking in direct
reclaim.  See commit b8d06fca089fae4680c3a552fc55c512bfb02202
for additional details.

  SPL: Fixing allocation for task txg_sync (6093) which
  used GFP flags 0x297bda7c with PF_NOFS set

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #917

diff --git a/module/zfs/zap_leaf.c b/module/zfs/zap_leaf.c
index b867ac4..ad21882 100644 (file)
--- a/module/zfs/zap_leaf.c
+++ b/module/zfs/zap_leaf.c
@@ -341,7 +341,7 @@ zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn,
 
                ASSERT(zn->zn_key_intlen == sizeof (*thiskey));
                thiskey = kmem_alloc(array_numints * sizeof (*thiskey),
-                   KM_SLEEP);
+                   KM_PUSHPAGE);
 
                zap_leaf_array_read(l, chunk, sizeof (*thiskey), array_numints,
                    sizeof (*thiskey), array_numints, thiskey);
@@ -353,7 +353,7 @@ zap_leaf_array_match(zap_leaf_t *l, zap_name_t *zn,
 
        ASSERT(zn->zn_key_intlen == 1);
        if (zn->zn_matchtype == MT_FIRST) {
-               char *thisname = kmem_alloc(array_numints, KM_SLEEP);
+               char *thisname = kmem_alloc(array_numints, KM_PUSHPAGE);
                boolean_t match;
 
                zap_leaf_array_read(l, chunk, sizeof (char), array_numints,

diff --git a/module/zfs/zap_micro.c b/module/zfs/zap_micro.c
index 178ab02..d5b97da 100644 (file)
--- a/module/zfs/zap_micro.c
+++ b/module/zfs/zap_micro.c
@@ -202,7 +202,7 @@ zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt)
 zap_name_t *
 zap_name_alloc_uint64(zap_t *zap, const uint64_t *key, int numints)
 {
-       zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_SLEEP);
+       zap_name_t *zn = kmem_alloc(sizeof (zap_name_t), KM_PUSHPAGE);
 
        ASSERT(zap->zap_normflags == 0);
        zn->zn_zap = zap;