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authorKevin Wolf <kwolf@redhat.com>2012-12-06 14:32:57 +0100
committerKevin Wolf <kwolf@redhat.com>2012-12-12 12:33:48 +0100
commit3c90c65d7adab49a41952ee14e1d65f81355e408 (patch)
tree932fd9a9e32c5f26fcf19ca8aa5fbecd60cd780e /block.c
parent9e35542b0fc3871caac15ccd57548b99df2c94b7 (diff)
blkdebug: Implement suspend/resume of AIO requests
This allows more systematic AIO testing. The patch adds three new operations to blkdebug: * Setting a "breakpoint" on a blkdebug event. The next request that triggers this breakpoint is suspended and is tagged with a name. The breakpoint is removed after a request has triggered it. * A suspended request (identified by it's tag) can be resumed * It's possible to check whether a suspended request with a given tag exists. This can be used for waiting for an event. Ideally, we would instead tag requests right when they are created and set breakpoints for individual requests. However, at this point the block layer doesn't allow this easily, and breakpoints that trigger for any request already allow a lot of useful testing. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block.c')
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