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authorDouglas Gilbert <dougg@torque.net>2006-09-20 18:20:49 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-09-26 12:23:15 -0400
commit6460e75a104d10458817d2f5b2fbff775bf0b43a (patch)
tree88e2a88aef94282728d1c764d02e5efa7ef7fee4 /include/asm-h8300/sembuf.h
parent8aee918a1cff2a3722ce76fc6fa5abe09aa98d1b (diff)
[SCSI] sg: fixes for large page_size
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 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. 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round it up, if necessary, to be a power of two - clean up sg.h header, correct bad urls and some statements that are no longer valid - make the def_reserved_size sysfs module attribute writable Signed-off-by: Douglas Gilbert 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@torque.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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