i read that part before i replied the email. u box seems to have total 16MB ram. and after load kernel, ~13MB is available. when u load this module, it only have ~640K free. as i said, the module want a 128KB CONTINUOUS memory. even the system have some left now, they are highly fragmented, does not have a continuous area like that size available now. so the memory allocation failed. u box only have that much ram. so high memory is always 0 no matter what. google meminfo and try to understand the meaning of each field. ming On Tue, 2006-04-18 at 07:26 +0530, Abu M. Muttalib wrote: > Thanks Ming for your reply.... > > Pls search in the mail for 'MemFree". Before inserting the module, its 664KB > and after, when insmod was tried its 1524KB. BUT during the module loading > procedure it shows that there is 0kB of highMemory as well as the same > amount of memory for lowMemory. My QUESTION is, where the pages have been > gone in between? > > ~Abu. > > -----Original Message----- > From: Ming Zhang [mailto:mingz@xxxxxxxxxxx] > Sent: Tuesday, April 18, 2006 6:41 PM > To: Abu M. Muttalib > Cc: kernelnewbies@xxxxxxxxxxxx > Subject: Re: problem inserting modules > > > u are trying to ask for a physically continuous 2^5 * 4K or 128KB > memory, it is pretty hard to find high order memory when u memory usage > is like that. > > try to load u module earlier or ask for low order memory. > > ming > > > On Tue, 2006-04-18 at 03:34 +0530, Abu M. Muttalib wrote: > > Hi, > > > > I am running linux kernel 2.6 on an embedded system. > > In my application I > > have executed the following command > > system ("cat /proc/meminfo") > > I see the following > > > > MemTotal: 13864 kB > > MemFree: 664 kB > > Buffers: 1588 kB > > Cached: 5452 kB > > SwapCached: 0 kB > > Active: 5280 kB > > Inactive: 3720 kB > > HighTotal: 0 kB > > HighFree: 0 kB > > LowTotal: 13864 kB > > LowFree: 664 kB > > SwapTotal: 0 kB > > SwapFree: 0 kB > > Dirty: 0 kB > > Writeback: 0 kB > > Mapped: 4664 kB > > Slab: 1596 kB > > CommitLimit: 6932 kB > > Committed_AS: 22300 kB > > PageTables: 172 kB > > VmallocTotal: 630784 kB > > VmallocUsed: 262576 kB > > VmallocChunk: 366588 kB > > > > Then subsequently I am inserting one module i get the > > "page allocation failure" > > > > and I get the following error message tho' kernel... > > > > > *************************************************************** > > > > insmod: page allocation failure. order:5, mode:0xd0 > > Mem-info: > > DMA per-cpu: > > cpu 0 hot: low 2, high 6, batch 1 used:5 > > cpu 0 cold: low 0, high 2, batch 1 used:1 > > Normal per-cpu: empty > > HighMem per-cpu: empty > > Free pages: 1216kB (0kB HighMem) > > Active:1494 inactive:674 dirty:0 writeback:0 > > unstable:0 free:304 slab:401 > > mapped:1259 pagetables:46 > > DMA free:1216kB min:512kB low:640kB high:768kB > > active:5976kB inactive:2696kB > > present:16384kB pages_scanned:0 all_unreclaimable? no > > lowmem_reserve[]: 0 0 0 > > Normal free:0kB min:0kB low:0kB high:0kB active:0kB > > inactive:0kB present:0kB > > pages_scanned:0 all_unreclaimable? no > > lowmem_reserve[]: 0 0 0 > > HighMem free:0kB min:128kB low:160kB high:192kB > > active:0kB inactive:0kB > > present:0kB pages_scanned:0 all_unreclaimable? no > > lowmem_reserve[]: 0 0 0 > > DMA: 18*4kB 51*8kB 28*16kB 1*32kB 2*64kB 1*128kB > > 0*256kB 0*512kB 0*1024kB = > > 1216kB > > Normal: empty > > HighMem: empty > > Swap cache: add 0, delete 0, find 0/0, race 0+0 > > Free swap = 0kB > > Total swap = 0kB > > Free swap: 0kB > > 4096 pages of RAM > > 382 free pages > > 701 reserved pages > > 401 slab pages > > 1570 pages shared > > 0 pages swap cached > > > > > *************************************************************** > > > > Now I again run the command > > system ("cat /proc/meminfo") > > and now I see the following: > > > > MemTotal: 13864 kB > > MemFree: 1524 kB > > Buffers: 1244 kB > > Cached: 5224 kB > > SwapCached: 0 kB > > Active: 5776 kB > > Inactive: 2672 kB > > HighTotal: 0 kB > > HighFree: 0 kB > > LowTotal: 13864 kB > > LowFree: 1524 kB > > SwapTotal: 0 kB > > SwapFree: 0 kB > > Dirty: 0 kB > > Writeback: 0 kB > > Mapped: 4676 kB > > Slab: 1604 kB > > CommitLimit: 6932 kB > > Committed_AS: 22168 kB > > PageTables: 172 kB > > VmallocTotal: 630784 kB > > VmallocUsed: 262560 kB > > VmallocChunk: 366588 kB > > > > Is there any clue? I have some 650 KB free before > > inserting the module and > > after that some 1.5 MB free memory space, and still I > > am not able to insert > > the module. > > > > Why it's so? Any help will be highly appreciated. > > > > ~Abu. > > > > > > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
