Thanks a lot. I will try out this. On 10-Feb-2018 2:08 PM, "Pintu Kumar" <[email protected]> wrote:
> On Fri, Feb 9, 2018 at 12:52 AM, Neil Thomas <[email protected]> wrote: > > Thanks, I will check it out. > > > > On 09-Feb-2018 12:50 AM, <[email protected]> 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 > > [email protected] > > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > >
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