K 10
svn:author
V 3
smh
K 8
svn:date
V 27
2013-10-22T13:31:36.066626Z
K 7
svn:log
V 354
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.

MFC after:	2 days

END