Author: smh
Date: Thu Oct 24 15:21:20 2013
New Revision: 257058
URL: http://svnweb.freebsd.org/changeset/base/257058
Log:
MFC r256889:
Use the vdev's ashift to calculate the supported min block size passed to
zio_compress_data(..) when compressing l2arc buffers.
This eliminates L2ARC I/O errors, which resulted in very poor performance on
vdev's configured with block size greater than 512b due to compression
assuming a smaller min block size than the vdev supports.
Approved by: re (glebius)
Modified:
stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
Directory Properties:
stable/10/sys/ (props changed)
stable/10/sys/cddl/contrib/opensolaris/ (props changed)
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Thu Oct
24 15:11:30 2013 (r257057)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Thu Oct
24 15:21:20 2013 (r257058)
@@ -5147,7 +5147,7 @@ l2arc_compress_buf(l2arc_buf_hdr_t *l2hd
len = l2hdr->b_asize;
cdata = zio_data_buf_alloc(len);
csize = zio_compress_data(ZIO_COMPRESS_LZ4, l2hdr->b_tmp_cdata,
- cdata, l2hdr->b_asize, (size_t)SPA_MINBLOCKSIZE);
+ cdata, l2hdr->b_asize, (size_t)(1ULL <<
l2hdr->b_dev->l2ad_vdev->vdev_ashift));
if (csize == 0) {
/* zero block, indicate that there's nothing to write */
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