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authorTejun Heo <tj@kernel.org>2008-08-25 12:47:25 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:06 +0200
commit870d6656126add8e383645732b03df2b7ccd4f94 (patch)
tree9c33dd91350ea163b160d9f5cb40d913c5caf268 /Documentation/uml
parentsd/ide-disk: apply extended minors to sd and ide (diff)
downloadlinux-870d6656126add8e383645732b03df2b7ccd4f94.tar.xz
linux-870d6656126add8e383645732b03df2b7ccd4f94.zip
block: implement CONFIG_DEBUG_BLOCK_EXT_DEVT
Extended devt introduces non-contiguos device numbers. This patch implements a debug option which forces most devt allocations to be from the extended area and spreads them out. This is enabled by default if DEBUG_KERNEL is set and achieves... 1. Detects code paths in kernel or userland which expect predetermined consecutive device numbers. 2. When something goes wrong, avoid corruption as adding to the minor of earlier partition won't lead to the wrong but valid device. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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