Hows things looking Vitalij?
----- Original Message -----
From: "Vitalij Satanivskij" <sa...@ukr.net>
Ok. Just right now system rebooted with you patch.
Trim enabled again.
WIll wait some time untile size of used cache grow's.
Steven Hartland wrote:
SH> Looking at the l2arc compression code I believe that metadata is always
SH> compressed with lz4, even if compression is off on all datasets.
SH>
SH> This is backed up by what I'm seeing on my system here as it shows a
SH> non-zero l2_compress_successes value even though I'm not using
SH> compression at all.
SH>
SH> I think we we may well need the following patch to set the minblock
SH> size based on the vdev ashift and not SPA_MINBLOCKSIZE.
SH>
SH> svn diff -x -p sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
SH> Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
SH> ===================================================================
SH> --- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c (revision
256554)
SH> +++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c (working
copy)
SH> @@ -5147,7 +5147,7 @@ l2arc_compress_buf(l2arc_buf_hdr_t *l2hdr)
SH> len = l2hdr->b_asize;
SH> cdata = zio_data_buf_alloc(len);
SH> csize = zio_compress_data(ZIO_COMPRESS_LZ4, l2hdr->b_tmp_cdata,
SH> - cdata, l2hdr->b_asize, (size_t)SPA_MINBLOCKSIZE);
SH> + cdata, l2hdr->b_asize, (size_t)(1ULL <<
l2hdr->b_dev->l2ad_vdev->vdev_ashift));
SH>
SH> if (csize == 0) {
SH> /* zero block, indicate that there's nothing to write */
SH>
SH> Could you try this patch on your system Vitalij see if it has any effect
SH> on the number of l2_cksum_bad / l2_io_error?
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