svn commit: r320153 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys

[Andriy Gapon]

Author: avg
Date: Tue Jun 20 16:55:30 2017
New Revision: 320153
URL: https://svnweb.freebsd.org/changeset/base/320153

Log:
  revert r315852 which introduced zio_buf_alloc_nowait for use in vdev_queue_aggregate
  
  I think that the change is still good, but reconciling it with a planned
  merge of the ARC buf data scatter-ization is a bit more tedious
  than I can handle.
  
  MFC after:	17 days

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h	Tue Jun 20 16:45:48 2017	(r320152)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zio.h	Tue Jun 20 16:55:30 2017	(r320153)
@@ -555,7 +555,6 @@ extern zio_t *zio_unique_parent(zio_t *cio);
 extern void zio_add_child(zio_t *pio, zio_t *cio);
 
 extern void *zio_buf_alloc(size_t size);
-extern void *zio_buf_alloc_nowait(size_t size);
 extern void zio_buf_free(void *buf, size_t size);
 extern void *zio_data_buf_alloc(size_t size);
 extern void zio_data_buf_free(void *buf, size_t size);

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c	Tue Jun 20 16:45:48 2017	(r320152)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c	Tue Jun 20 16:55:30 2017	(r320153)
@@ -647,7 +647,6 @@ static zio_t *
 vdev_queue_aggregate(vdev_queue_t *vq, zio_t *zio)
 {
 	zio_t *first, *last, *aio, *dio, *mandatory, *nio;
-	void *abuf;
 	uint64_t maxgap = 0;
 	uint64_t size;
 	boolean_t stretch;
@@ -766,12 +765,8 @@ vdev_queue_aggregate(vdev_queue_t *vq, zio_t *zio)
 	size = IO_SPAN(first, last);
 	ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
 
-	abuf = zio_buf_alloc_nowait(size);
-	if (abuf == NULL)
-		return (NULL);
-
 	aio = zio_vdev_delegated_io(first->io_vd, first->io_offset,
-	    abuf, size, first->io_type, zio->io_priority,
+	    zio_buf_alloc(size), size, first->io_type, zio->io_priority,
 	    flags | ZIO_FLAG_DONT_CACHE | ZIO_FLAG_DONT_QUEUE,
 	    vdev_queue_agg_io_done, NULL);
 	aio->io_timestamp = first->io_timestamp;

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c	Tue Jun 20 16:45:48 2017	(r320152)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c	Tue Jun 20 16:55:30 2017	(r320153)
@@ -272,33 +272,18 @@ zio_fini(void)
  * useful to inspect ZFS metadata, but if possible, we should avoid keeping
  * excess / transient data in-core during a crashdump.
  */
-static void *
-zio_buf_alloc_impl(size_t size, boolean_t canwait)
+void *
+zio_buf_alloc(size_t size)
 {
 	size_t c = (size - 1) >> SPA_MINBLOCKSHIFT;
 	int flags = zio_exclude_metadata ? KM_NODEBUG : 0;
 
 	VERIFY3U(c, <, SPA_MAXBLOCKSIZE >> SPA_MINBLOCKSHIFT);
 
-	if (zio_use_uma) {
-		return (kmem_cache_alloc(zio_buf_cache[c],
-		    canwait ? KM_PUSHPAGE : KM_NOSLEEP));
-	} else {
-		return (kmem_alloc(size,
-		    (canwait ? KM_SLEEP : KM_NOSLEEP) | flags));
-	}
-}
-
-void *
-zio_buf_alloc(size_t size)
-{
-	return (zio_buf_alloc_impl(size, B_TRUE));
-}
-
-void *
-zio_buf_alloc_nowait(size_t size)
-{
-	return (zio_buf_alloc_impl(size, B_FALSE));
+	if (zio_use_uma)
+		return (kmem_cache_alloc(zio_buf_cache[c], KM_PUSHPAGE));
+	else
+		return (kmem_alloc(size, KM_SLEEP|flags));
 }
 
 /*