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authorRichard Weinberger <richard@nod.at>2016-04-26 23:47:37 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2017-02-20 14:09:04 +0100
commit1fed9b4666f6907b56851d163e8b634100e77d2a (patch)
tree2b67272c8621c2462e1dd21d2deb022bcc5ea8fd /tests/ubi-tests/README.udev
parent22089b0e753bf9020ac64474b8b4ddbe308a4ae6 (diff)
Remove UDEV_SETTLE_HACK
UDEV_SETTLE_HACK addresses a problem which does no longer exist on Linux. These days we have devtmpfs. New devices will automatically created on the kernel side and user space has no longer to wait for udev. As udev has a hard dependency on devtmpfs we can depend on it too. People which don't use udev nor plain devtmpfs are anyways on their own. Android, I'm looking at you... Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
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diff --git a/tests/ubi-tests/README.udev b/tests/ubi-tests/README.udev
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--- a/tests/ubi-tests/README.udev
+++ /dev/null
@@ -1,25 +0,0 @@
-There is a problem with udev: when a volume is created, there is a delay
-before corresponding /dev/ubiX_Y device node is created by udev, so some
-tests fail because of this. The symptom is error messages like
-"cannot open /dev/ubi0_0".
-
-One possible solution of this problem is to pre-create UBI device and volume
-nodes. There is even a script which may be used for this in ubi-utils/scripts/.
-But this is not enough because udev will still remove and re-create the nodes
-and tests will still fail. So you need to stop removing device nodes using
-the following udev rule:
-
- KERNEL=="ubi*_*", ACTION=="remove", OPTIONS+="ignore_device"
-
-In our Ubuntu distribution we put that to new file:
-/etc/udev/rules.d/50-local.rules
-
-Another possibility is to call udevsettle utility in libubi after the volume
-has been created See src/libubi.c - the call is compiled in only if
-UDEV_SETTLE_HACK is defined. This is anyway an ugly hack, but works, although
-makes the tests slower. Suggestions are welcome.
-
-So, if you have udevsettel unility in your system, you do not have to do
-anyting, and the tests should work, because we compile libubi with
-UDEV_SETTLE_HACK. Otherwise, you should remove -D UDEV_SETTLE_HACK
-from the makefile and pre-create UBI device nodes.