mirror_zfs/module/zcommon
Brian Behlendorf ca5fd24984 Limit maximum ashift value to 12
While we initially allowed you to set your ashift as large as 17
(SPA_MAXBLOCKSIZE) that is actually unsafe.  What wasn't considered
at the time is that each uberblock written to the vdev label ring
buffer will be of this size.  Now the buffer is statically sized
to 128k and we need to be able to fit several uberblocks in it.
With a large ashift that becomes a problem.

Therefore I'm reducing the maximum configurable ashift value to 12.
This is large enough for the 4k sector drives and small enough that
we can still keep the most recent 32 uberblock in the vdev label
ring buffer.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #425
2011-11-11 14:50:48 -08:00
..
Makefile.in Add basic uio support 2011-02-10 09:21:43 -08:00
zfs_comutil.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_deleg.c Illumos #278: get rid zfs of python and pyzfs dependencies 2011-08-01 12:09:36 -07:00
zfs_fletcher.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_namecheck.c Add linux kernel module support 2010-08-31 13:41:58 -07:00
zfs_prop.c Illumos #1092: zfs refratio property 2011-08-01 12:09:11 -07:00
zfs_uio.c Add basic uio support 2011-02-10 09:21:43 -08:00
zpool_prop.c Limit maximum ashift value to 12 2011-11-11 14:50:48 -08:00
zprop_common.c Add linux kernel module support 2010-08-31 13:41:58 -07:00