thank you pradeep singh for the sharing. In the /proc/meminfo, I saw this (and my questions follows): MemTotal: 3046884 kB MemFree: 1502524 kB ===>this is the physical free memory? Buffers: 90820 kB Cached: 624168 kB SwapCached: 0 kB Active: 964128 kB Inactive: 519928 kB HighTotal: 2162240 kB HighFree: 758656 kB===>this is the total free memory available via using __get_free_pages(__GFP_HIGHMEM)? LowTotal: 884644 kB LowFree: 743868 kB===>this is the total free memory available via using __get_free_pages(GFP_KERNEL)? SwapTotal: 4192924 kB SwapFree: 4192924 kB Thanks for the sharing.... On Mon, Sep 29, 2008 at 11:50 PM, pradeep singh <2500.pradeep@xxxxxxxxx> wrote: > On Mon, Sep 29, 2008 at 9:48 AM, Peter Teoh <htmldeveloper@xxxxxxxxx> wrote: >> I would like to know the maximum memory I can allocate (using >> alloc_page()) in GFP_KERNEL and __GFP_HIGHMEM memory area - how can I >> know that? > > Peter, I doubt you can precisely know that at any given time. :) > A lot of issues come into picture, the order of pages you want to > allocate, fragmentation, pages used as anonymous pages , pages for > other dynamic allocation which is required by kernel etc. > All these make it really difficult for precise answer. > Approximation I think you do it using some simple maths. > > HTH, > -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
