On Tue, Aug 18, 2009 at 10:45 AM, Michael Blizek<[email protected]> wrote: > Hi! > > On 10:08 Tue 18 Aug , Devesh Sharma wrote: >> On Tue, Aug 18, 2009 at 9:17 AM, Mulyadi >> Santosa<[email protected]> wrote: >> > On Tue, Aug 18, 2009 at 4:03 AM, <[email protected]> wrote: >> >> Hi, >> >> >> >> I trying to allocate huge amount of memory >4GB (64bit) in LKM: >> >> >> If you do not require contiguous memory, use multiple calls of >> get_free_pages with order 10 >> and have some simple buffer managament scheme over it. > > I would rather recommend calling it with order 0. This means allocating > single pages instead of several contiguous ones. By doing this, you will > suffer less when the memory gets fragmented and you decrease the pressure > on the memory subsystem. Hmm....surly this will avoid fragmentation but, on the contrary, it will increase the size of array holding the buffer pointers. Well, the trade-off always remains there, order must be allocated wisely. > > -Michi > -- > programing a layer 3+4 network protocol for mesh networks > see http://michaelblizek.twilightparadox.com > >
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