Re: vmalloc and page faults (was: memory descriptor and kernel threads)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 4/20/07, Adil Mujeeb <mujeeb.adil@xxxxxxxxx> wrote:



On 4/19/07, pradeep singh <2500.pradeep@xxxxxxxxx> wrote:
> On 4/19/07, Rajat Jain <rajat.noida.india@xxxxxxxxx> wrote:
> > Hi,
> >
> > > ... the kernel thread is as sensitive as the kernel itself
> > > for the page faults. It _should not_ fault, unless ofcourse if its a
> > > vmalloc'ed area .. and that happens every other kernel path anyway....
> >
> > I have a doubt about the vmalloc'ed memory. Is the vmalloced chunk of
> > memory allowed to be swapped out? Can it / Does it?
> No, it is not swappable, you get non contigous chunks of memory
> allocated using kmalloc actually. Therefore, IMHO it is not swappable.
> please CMIIW.


Pradeep it should be vmalloc rather than kmalloc???
Nope, i meant you get chunks of memory, each chunk allocated using
kmalloc and then given to you as a virtually contigous memory. All
this happends inside vmalloc you can say :).
HTH
~psr

> My doubt arises
> > from the fact that the memory for the loadable modules at module load
> > time is allocated using vmalloc() ...
> Yes, looks to me too :).But here is another question to all.
> Why vmalloc is used to allocate memory for modules and not kmalloc?
> Even though memory we can get using vmalloc is from a scarce pool.
>
> TIA
> ~psr
> >
> > Thanks,
> >
> > Rajat
> >
> > --
> > To unsubscribe from this list: send an email with
> > "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
> > Please read the FAQ at http://kernelnewbies.org/FAQ
> >
> >
>
>
> --
> play the game
>
> --
> To unsubscribe from this list: send an email with
> "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
> Please read the FAQ at http://kernelnewbies.org/FAQ
>
>




--
play the game

--
To unsubscribe from this list: send an email with
"unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx
Please read the FAQ at http://kernelnewbies.org/FAQ


[Index of Archives]     [Newbies FAQ]     [Linux Kernel Mentors]     [Linux Kernel Development]     [IETF Annouce]     [Git]     [Networking]     [Security]     [Bugtraq]     [Yosemite]     [MIPS Linux]     [ARM Linux]     [Linux RAID]     [Linux SCSI]     [Linux ACPI]
  Powered by Linux