Latest computer virtual memory Weblinks:
- Re: how to get physical memory address from virtual memory address
Really? So what happens when the page is swapped out? It's still a valid virtual address, but there's no valid physical address behind it, until it's swapped back in by a page-fault or the prefetcher. -n- Re: how to get physical memory address from virtual memory address
Hari wrote: There isn't one. You haven't allocated any physical memory, so the kernel doesn't give you any. DS- Re: how to get physical memory address from virtual memory address
So what happens if you 'malloc' more memory than is physically present? What happens if three programs each 'malloc' a block that is equal in size to half of physical memory? What would be the point of swap if this were the case? Yes, it can change at any time. It can even change such that there is not one. And because Linux is demand paged, when you first allocate or- Anyone know about computers Virtual memory Problem)
Hi My computer is shagged! I have deleted shitloads off my hard drive and am now down to the bear minimum yet the memory is non-existent i thought i had a virus but two checks have said No! Does anyone know what to do? It is a work computer so will not be fixed for a while anyone got any suggestions? The message your virtual memory is running low comes up all the time and i cant even use the internet with summit else Please Help!- Re: how to get physical memory address from virtual memory address
Where does the physical memory come from when you turn on virtual memory overcommits? Look at Documentation/vm/overcommit-ac counting in your kernel sources. Setting vm.overcommit_memory=1 is indeed useful in some circumstances but can lead to unpredictable process deaths.- how to get physical memory address from virtual memory address
Hi , I am using Linux 2.4.20 Kernel. I am runing an application which will malloc and returns a virtual memory address. I need to get the physical memory address for that virtual memory address. How can I get that? Thanks in advance, -Hari- Re: how to get physical memory address from virtual memory address
This is not a task that should be performed by the user-level process. You can't for example test the memory which is permanently mapped by kernel (which user-level process is not allowed to access). For memory diagnostics, tools specifically crafted for such tasks should be used (such as memtest86).
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