On Fri, Feb 9, 2018 at 12:52 AM, Neil Thomas <neilkt27@gmail.com> wrote:
Thanks, I will check it out.
On 09-Feb-2018 12:50 AM, <valdis.kletnieks@vt.edu> wrote:
On Thu, 08 Feb 2018 23:38:01 +0530, Neil Thomas said:
I am just a beginner. I have tried procfs, Netlink socket to communicate between user space and kernel space and it works fine.
I am developing a monitoring utility to trace the VFS operation and find the frequency of VFS function calls. This monitoring utility runs in kernel space. We have to record the occurrence of each VFS function calls (like vfs_open(), vfs_read()). I don't know which is best mechanism to report this VFS event to the monitoring utility.
Could anyone please suggest the best mechanism to transfer data frequently between kernel modules.
You can also use ION (CONFIG_ION) or DMABUF (DMA_SHARED_BUFFER) buffer sharing mechanism to share data between 2 drivers. Check this: https://www.kernel.org/doc/html/latest/driver-api/dma-buf.html https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/driv...
There's a perfectly good perf-based function trace facility that will provide this info to userspace.
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