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f21121cde6
linux/drivers/block
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Hideyuki Sasaki f21121cde6 block/ps3: fix slow VRAM IO 
The current PS3 VRAM driver uses msleep() to wait for completion of RSX
DMA transfers between system memory and VRAM.  Depending on the system
timing, the processing delay and overhead of this msleep() call can
significantly impact VRAM driver IO.

To avoid the condition, add a short duration (200 usec max) udelay()
polling loop before entering the msleep() polling loop.

Signed-off-by: Hideyuki Sasaki <xhide@rd.scei.sony.co.jp>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: Jim Paris <jim@jtan.com>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2009-11-04 09:09:28 +01:00
..
aoe const: make block_device_operations const 2009-09-22 07:17:25 -07:00
drbd drbd: fix in_flight rw indexing 2009-10-28 09:30:27 +01:00
paride const: make block_device_operations const 2009-09-22 07:17:25 -07:00
amiflop.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
ataflop.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
brd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
cciss_cmd.h cciss: Ignore stale commands after reboot 2009-07-03 21:06:45 +02:00
cciss_scsi.c cciss: decode unit attention in SCSI error handling code 2009-06-09 05:47:44 +02:00
cciss_scsi.h
cciss.c cciss: Add cciss_allow_hpsa module parameter 2009-10-13 09:18:22 +02:00
cciss.h cciss: Dynamically allocate the drive_info_struct for each logical drive. 2009-10-01 21:15:45 +02:00
cpqarray.c cpqarray: switch to seq_file 2009-10-01 21:15:40 +02:00
cpqarray.h
cryptoloop.c
DAC960.c dac960: switch to seq_file 2009-10-01 21:15:40 +02:00
DAC960.h
floppy.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
hd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
ida_cmd.h
ida_ioctl.h
Kconfig The DRBD driver 2009-10-01 21:17:49 +02:00
loop.c loop: fix NULL dereference if mount fails 2009-10-29 07:39:27 -07:00
Makefile The DRBD driver 2009-10-01 21:17:49 +02:00
mg_disk.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
nbd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
osdblk.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
pktcdvd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
ps3disk.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
ps3vram.c block/ps3: fix slow VRAM IO 2009-11-04 09:09:28 +01:00
smart1,2.h
sunvdc.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
swim3.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2009-09-22 07:51:45 -07:00
swim_asm.S
swim.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
sx8.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
ub.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
umem.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
umem.h
viodasd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
virtio_blk.c virtio_blk: Revert serial number support 2009-10-22 16:39:30 +10:30
xd.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
xd.h
xen-blkfront.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
xsysace.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00
z2ram.c const: make block_device_operations const 2009-09-22 07:17:25 -07:00