Hello zfs-code,
http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/vdev_cache.c 72 * All i/os smaller than zfs_vdev_cache_max will be turned into 73 * 1<<zfs_vdev_cache_bshift byte reads by the vdev_cache (aka software 74 * track buffer). At most zfs_vdev_cache_size bytes will be kept in each 75 * vdev's vdev_cache. While it is mentioned in lines 46, 47 that it does affect only metadata I/O, imho for clarity it should also be mentioned in lines 72-75. I guess http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/zio.c#963 http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/zfs/vdev_cache.c#272 are responsible for assuring that vdev_cache is used only for metadata. btw: above code changes were introduced as part of 6437064 (with further changes)- has it been backported to S10 and/or delivered as patch? -- Best regards, Robert Milkowski mailto:milek at task.gda.pl http://milek.blogspot.com
