From: Matti Linnanvuori <mattilinnanvuori@xxxxxxxxx>
Correct IDEPCI_SHARE_IRQ description to keeping interrupts enabled
when calling the PCI IDE action handler.
Add IDEPCI_SHARE_IRQ and IDEDISK_MULTI_MODE help text from hdparm
manual page.
Signed-off-by: Matti Linnanvuori <mattilinnanvuori@xxxxxxxxx>
---
--- a/drivers/ide/Kconfig 2007-10-21 08:53:11.826349500 +0300
+++ b/drivers/ide/Kconfig 2007-10-21 09:21:48.295590000 +0300
@@ -154,6 +154,18 @@ config BLK_DEV_IDEDISK
config IDEDISK_MULTI_MODE
bool "Use multi-mode by default"
help
+ Multiple sector mode is a feature of most modern IDE hard
+ drives, permitting the transfer of multiple sectors per I/O
+ interrupt, rather than the usual one sector per interrupt.
+ When this feature is enabled, it typically reduces operating
+ system overhead for disk I/O by 30-50%. On many systems, it
+ also provides increased data throughput of anywhere from 5%
+ to 50%. Some drives, however (most notably the WD Caviar
+ series), seem to run slower with multiple mode enabled. Some
+ drives claim to support multiple mode, but lose data at some
+ settings. Under rare circumstances, such failures can result
+ in massive filesystem corruption.
+
If you get this error, try to say Y here:
hda: set_multmode: status=0x51 { DriveReady SeekComplete Error }
@@ -367,11 +379,16 @@ config BLK_DEV_IDEPCI
bool
config IDEPCI_SHARE_IRQ
- bool "Sharing PCI IDE interrupts support"
+ bool "Keeping interrupts enabled when calling the PCI IDE action handler support"
depends on BLK_DEV_IDEPCI
help
- Some ATA/IDE chipsets have hardware support which allows for
- sharing a single IRQ with other cards. To enable support for
+ A setting of Y permits the driver to unmask other interrupts
+ during processing of a disk interrupt, which greatly improves
+ Linux's responsiveness and eliminates "serial port overrun"
+ errors. Use this feature with caution: some drive/controller
+ combinations do not tolerate the increased I/O latencies
+ possible when this feature is enabled, resulting in massive
+ filesystem corruption. To enable support for
this in the ATA/IDE driver, say Y here.
It is safe to say Y to this question, in most cases.
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