Author: mav
Date: Thu Mar 10 16:39:46 2016
New Revision: 296615
URL: https://svnweb.freebsd.org/changeset/base/296615
Log:
Make ZFS ignore stripe sizes above SPA_MAXASHIFT (8KB).
If device has stripe size bigger then maximal sector size supported by
ZFS, there is nothing can be done to avoid read-modify-write cycles.
Taking that stripe size into account will only reduce space efficiency
and pointlessly bother user with warnings that can not be fixed.
Discussed with: smh
Modified:
head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c
Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c Thu Mar
10 15:51:43 2016 (r296614)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_geom.c Thu Mar
10 16:39:46 2016 (r296615)
@@ -812,7 +812,7 @@ vdev_geom_open(vdev_t *vd, uint64_t *psi
*logical_ashift = highbit(MAX(pp->sectorsize, SPA_MINBLOCKSIZE)) - 1;
*physical_ashift = 0;
if (pp->stripesize > (1 << *logical_ashift) && ISP2(pp->stripesize) &&
- pp->stripeoffset == 0)
+ pp->stripesize <= (1 << SPA_MAXASHIFT) && pp->stripeoffset == 0)
*physical_ashift = highbit(pp->stripesize) - 1;
/*
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