On Fri, Feb 9, 2018 at 12:52 AM, Neil Thomas <neilk...@gmail.com> wrote: > Thanks, I will check it out. > > On 09-Feb-2018 12:50 AM, <valdis.kletni...@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/drivers/staging/android/ion?h=v4.15 >> >> There's a perfectly good perf-based function trace facility that will >> provide >> this info to userspace. >> >> http://www.brendangregg.com/perf.html#StaticKernelTracing >> > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
