Douglas Gilbert wrote: > This sg driver patch addresses the problem with larger > page sizes reported by Brian King in this post: > http://marc.theaimsgroup.com/?l=linux-scsi&m=115867718623631&w=2 This fixes the oops I was seeing on PPC64 with 64k pages enabled. Brian > Some other related matters are also addressed. Some of these > prevent oopses when the SG_SCATTER_SZ or scatter_elem_sz are > set to inappropriate values. > > The scatter_elem_sz has been tested up to 4 MB which should > make the largest data transfer with one SCSI command, 32 MB > less one block, achievable with a relatively small number > of elements in the scatter gather list. > > For consideration in lk 2.6.19 . The patch is against lk 2.6.18 . > > ChangeLog: > - add scatter_elem_sz boot time parameter and sysfs module > parameter that is initialized to SG_SCATTER_SZ > - the driver will then adjust scatter_elem_sz to be the > max(given(scatter_elem_sz), PAGE_SIZE) > It will also round it up, if necessary, to be a power > of two > - clean up sg.h header, correct bad urls and some statements > that are no longer valid > - make the def_reserved_size sysfs module attribute writable > > Signed-off-by: Douglas Gilbert <dougg@xxxxxxxxxx> > > Doug Gilbert > -- Brian King eServer Storage I/O IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
