From: Massimo Maggi <massimo@mmmm.it>
Date: Sun, 7 Oct 2012 19:54:06 +0000 (+0200)
Subject: Switch KM_SLEEP to KM_PUSHPAGE
X-Git-Tag: zfs-0.6.0-rc12~26
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=beb999445adaa6d794f0d706ca8a0c835cb1468c;p=zfs

Switch KM_SLEEP to KM_PUSHPAGE

Prevent snapshot_check to initiate I/O during memory allocation.

Signed-off-by: Massimo Maggi <massimo@mmmm.it>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1023
---

diff --git a/module/zfs/dmu_objset.c b/module/zfs/dmu_objset.c
index c1bc1de7b..628b23be1 100644
--- a/module/zfs/dmu_objset.c
+++ b/module/zfs/dmu_objset.c
@@ -848,7 +848,7 @@ snapshot_check(void *arg1, void *arg2, dmu_tx_t *tx)
 		if (strlen(sn->htag) + MAX_TAG_PREFIX_LEN >= MAXNAMELEN)
 			return (E2BIG);
 
-		sn->ha = kmem_alloc(sizeof (struct dsl_ds_holdarg), KM_SLEEP);
+		sn->ha = kmem_alloc(sizeof(struct dsl_ds_holdarg), KM_PUSHPAGE);
 		sn->ha->temphold = B_TRUE;
 		sn->ha->htag = sn->htag;
 	}