ok, Thank You
On Mon, Feb 12, 2018 at 10:30 PM, <kernelnewbies-request@xxxxxxxxxxxxxxxxx> wrote:
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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" <me@xxxxxxxx>
To: Neil Thomas <neilkt27@xxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>, valdis.kletnieks@xxxxxx, Pintu Kumar
<pintu.ping@xxxxxxxxx>, 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.ping@xxxxxxxxx> wrote:
>
> > On Fri, Feb 9, 2018 at 12:52 AM, Neil Thomas <neilkt27@xxxxxxxxx> wrote:
> > > Thanks, I will check it out.
> > >
> > > On 09-Feb-2018 12:50 AM, <valdis.kletnieks@xxxxxx> 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
> > >
> >
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------------------------------
Message: 2
Date: Mon, 12 Feb 2018 11:59:52 -0500
From: Ruben Safir <ruben@xxxxxxxxxxxx>
To: yash omer <yashomer0007@xxxxxxxxx>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: newbie
Message-ID: <20180212165952.GA27328@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
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