On Fri, 2004-10-08 at 21:09, Anand wrote: > hey this link sld help u better http://kerneltrap.org/node/view/2450 > , > More over in the kernel space kmalloc() does the Physical Memory > allocation, but the address returned by kmalloc is also a virtual address right?? it's only that kmalloc gives a continuous chunk of mem. as compared to vmalloc thanx, -mandeep > and vmalloc does the Virtual Memory allocation. > > Rgds, > Anand > -----Original Message----- > From: kernelnewbies-bounce@xxxxxxxxxxxx > [mailto:kernelnewbies-bounce@xxxxxxxxxxxx]On Behalf Of matrix > reloaded > Sent: Friday, October 08, 2004 3:46 PM > To: Mandeep Sandhu > Cc: kernelnewbies; manish regmi > Subject: Re: memory used by kernel? > > > > > > > On Fri, 08 Oct 2004 Mandeep Sandhu wrote : > > >then is there amax limit upto which the kernel can allocate > mem > >for itself + what is the significance of the 3G/1G split?? > >Is'nt this 1G mapping the limit upto which all kernel space > >addresses can exist??? can the kernel eat into user-space mem > >as well? > > This 1G thing is virtual address space division, but you are > right in the sense that > this may be the limit for kernel memory usage, as for physical > memory you need to > have virtual address space also in protected mode on x86. > > Thanks. > Sumit Sharma > IBM, Bangalore. > > > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
