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authorStefan Richter <stefanr@s5r6.in-berlin.de>2009-06-18 21:03:23 +0200
committerJames Bottomley <James.Bottomley@HansenPartnership.com>2009-06-21 11:10:41 -0500
commit5e2fb917920c62c5ad260962471aeb578b52ac40 (patch)
treec427070a8ad52def1796af03974551c9d8931063 /drivers/scsi/Kconfig
parent017b2ae33c0fc7d70320cc7f1cce0efb6ce8d929 (diff)
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explain the hidden scsi_wait_scan Kconfig variable
People keep sending patches to expose CONFIG_SCSI_WAIT_SCAN as a tunable item. These patches aren't accepted upstream, so let's stop the ongoing irritation of people due to the unconditionally installed module and its Kconfig symbol. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/Kconfig')
-rw-r--r--drivers/scsi/Kconfig13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 6a19ed9a119..9c23122f755 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -258,10 +258,21 @@ config SCSI_SCAN_ASYNC
or async on the kernel's command line.
config SCSI_WAIT_SCAN
- tristate
+ tristate # No prompt here, this is an invisible symbol.
default m
depends on SCSI
depends on MODULES
+# scsi_wait_scan is a loadable module which waits until all the async scans are
+# complete. The idea is to use it in initrd/ initramfs scripts. You modprobe
+# it after all the modprobes of the root SCSI drivers and it will wait until
+# they have all finished scanning their buses before allowing the boot to
+# proceed. (This method is not applicable if targets boot independently in
+# parallel with the initiator, or with transports with non-deterministic target
+# discovery schemes, or if a transport driver does not support scsi_wait_scan.)
+#
+# This symbol is not exposed as a prompt because little is to be gained by
+# disabling it, whereas people who accidentally switch it off may wonder why
+# their mkinitrd gets into trouble.
menu "SCSI Transports"
depends on SCSI