On Mon, 2007-02-26 at 14:01 +0200, Ramagudi Naziir wrote: > Hi Arjan, > > On 2/26/07, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote: > > On Sat, 2007-02-24 at 20:33 +0000, Liran wrote: > > > I want to develop a kernel module that will be used to account for the > > > input/output of files on the system > > > and was wondering about doing it by intercepting the open() / read() / write() > > > system calls with their size attributes > > > and using that as a counter. (Later on, I wish to attach to a specific pid or > > > account for all i/o for a specific user but that's later). > > > > I think your first misconception is that all IO starts with a syscall... > > that's actually very much not the case (hint: mmap'd areas). > > Can you please elaborate ? whare / what apps make use of mmap'd areas ? glibc can for stdio all databases do all database libraries tend to do this ... the list goes on. it can be everywhere -- if you want to mail me at work (you don't), use arjan (at) linux.intel.com Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
