WSL2-Linux-Kernel/drivers/s390
Frank Pavlic 8129ee1642 [PATCH] s390: qdio V=V pass-through
New feature V=V qdio pass-through.

QDIO and HiperSockets processing in z/VM V=V guest environments (as well as
V=R with z/VM running in LPAR mode) requires shadowing of all QDIO
architecture queue elements.  Especially the shadowing of SBALs and SLSBs
structures in the hypervisor, and the need to issue SIGA SYNC operations to
observe state changes, eventually causes significant CPU processing overhead
in the hypervisor.

The QDIO pass-through support for V=V guests avoids the shadowing of SBALs and
SLSBs.  This significantly reduces the hypervisor overhead for QDIO based I/O.

Signed-off-by: Frank Pavlic <pavlic@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-06 08:33:51 -08:00
..
block [PATCH] s390: dasd failfast support 2006-01-06 08:33:50 -08:00
char [PATCH] s390: atomic primitives 2006-01-06 08:33:48 -08:00
cio [PATCH] s390: qdio V=V pass-through 2006-01-06 08:33:51 -08:00
crypto [PATCH] remove CONFIG_KOBJECT_UEVENT option 2006-01-04 16:18:07 -08:00
net [PATCH] s390: move s390_root_dev_* out of the cio layer 2006-01-06 08:33:49 -08:00
scsi [SCSI] zfcp: fix return code of zfcp_scsi_slave_alloc 2005-12-01 15:59:49 -06:00
Kconfig [PATCH] s390: add vmcp interface 2005-06-25 16:24:37 -07:00
Makefile [PATCH] s390: move s390_root_dev_* out of the cio layer 2006-01-06 08:33:49 -08:00
ebcdic.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
s390_rdev.c [PATCH] s390: move s390_root_dev_* out of the cio layer 2006-01-06 08:33:49 -08:00
s390mach.c [PATCH] s390: machine check handler bugs 2005-09-05 00:06:25 -07:00
s390mach.h [PATCH] s390: "extern inline" -> "static inline" 2005-11-09 07:55:52 -08:00
sysinfo.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00