ok, Thank You On Mon, Feb 12, 2018 at 10:30 PM, <kernelnewbies-requ...@kernelnewbies.org> wrote:
> Send Kernelnewbies mailing list submissions to > kernelnewbies@kernelnewbies.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > or, via email, send a message with subject or body 'help' to > kernelnewbies-requ...@kernelnewbies.org > > You can reach the person managing the list at > kernelnewbies-ow...@kernelnewbies.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Kernelnewbies digest..." > > > Today's Topics: > > 1. Re: Query on mechanisms to communicate between kernel modules > in Linux (Tobin C. Harding) > 2. Re: newbie (Ruben Safir) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 12 Feb 2018 11:25:05 +1100 > From: "Tobin C. Harding" <m...@tobin.cc> > To: Neil Thomas <neilk...@gmail.com> > Cc: Greg KH <g...@kroah.com>, valdis.kletni...@vt.edu, Pintu Kumar > <pintu.p...@gmail.com>, kernelnewbies@kernelnewbies.org > Subject: Re: Query on mechanisms to communicate between kernel modules > in Linux > Message-ID: <20180212002505.GA16552@eros> > Content-Type: text/plain; charset=us-ascii > > On Sat, Feb 10, 2018 at 10:30:36PM +0530, Neil Thomas wrote: > > Thanks a lot. I will try out this. > > Please don't top post. It upsets people. > > Good luck, > Tobin. > > > On 10-Feb-2018 2:08 PM, "Pintu Kumar" <pintu.p...@gmail.com> wrote: > > > > > 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 > > > > > ------------------------------ > > Message: 2 > Date: Mon, 12 Feb 2018 11:59:52 -0500 > From: Ruben Safir <ru...@mrbrklyn.com> > To: yash omer <yashomer0...@gmail.com> > Cc: kernelnewbies@kernelnewbies.org > Subject: Re: newbie > Message-ID: <20180212165952.ga27...@www2.mrbrklyn.com> > Content-Type: text/plain; charset=us-ascii > > use mutt > > > On Fri, Feb 09, 2018 at 11:01:52PM +0530, yash omer wrote: > > Hello, > > Please guide me how to follow with mailing list > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies@kernelnewbies.org > > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > -- > So many immigrant groups have swept through our town > that Brooklyn, like Atlantis, reaches mythological > proportions in the mind of the world - RI Safir 1998 > http://www.mrbrklyn.com > > DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 > http://www.nylxs.com - Leadership Development in Free Software > http://www2.mrbrklyn.com/resources - Unpublished Archive > http://www.coinhangout.com - coins! > http://www.brooklyn-living.com > > Being so tracked is for FARM ANIMALS and and extermination camps, > ut incompatible with living as a free human being. -RI Safir 2013 > 1 > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > ------------------------------ > > End of Kernelnewbies Digest, Vol 87, Issue 23 > ********************************************* >
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