[patch 7/7] Port of blktrace to the Linux Kernel Markers.

Here is the first stage of a port of blktrace to the Linux Kernel Markers. The advantage of this port is that it minimizes the impact on the running when blktrace is not active. A few remarks : this patch has the positive effect of removing some code from the block io tracing hot paths,

[patch 7/7] Port of blktrace to the Linux Kernel Markers.

Here is the first stage of a port of blktrace to the Linux Kernel Markers. The advantage of this port is that it minimizes the impact on the running when blktrace is not active. A few remarks : this patch has the positive effect of removing some code from the block io tracing hot paths,