Hi,
How about setting /proc/sys/vm/min_free_kbytes to small values, e.g 128?
And what's the output on other workable system?
How about setting /proc/sys/vm/min_free_kbytes to small values, e.g 128?
And what's the output on other workable system?
--
Regards,
shhuiw
shhuiw
At 2014-07-09 08:23:29, "Amit Agarwal" <amit@xxxxxxxxxxxxxxxxxx> wrote: >Hi All, > >We are running a 32 bit application on RHEL6.3-64 bit OS with kernel >version 2.6.32-279.el6.x86_64. > >While running this application we see the following when running under >strace: >mmap(offset=33230848, len=2068480) failed with errno=12 for the file ><so file name> > >The system has enough RAM, total 16GB and about 12 GB free. We checked >buddyinfo on the system, when the application is running and see the >below trend: >Node 0, zone Normal 5200 21396 21389 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 5231 21395 21389 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 5128 21401 21389 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 5060 21405 21391 21516 16202 12770 9054 >4459 1430 168 313 >.............. >Node 0, zone Normal 483 17946 21342 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 315 17937 21342 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 345 17891 21352 21516 16202 12770 9054 >4459 1430 168 313 >Node 0, zone Normal 278 17785 21352 21516 16202 12770 9054 >4459 1430 168 313 > > >At this point the application crashes with mmap error. > > >Page Type information on the system: >Page block order: 9 >Pages per block: 512 > >Free pages count per migrate type at order 0 1 2 3 > 4 5 6 7 8 9 10 >Node 0, zone DMA, type Unmovable 1 0 0 1 > 0 0 1 0 0 0 0 >Node 0, zone DMA, type Reclaimable 0 0 0 0 > 0 0 0 0 0 0 0 >Node 0, zone DMA, type Movable 0 0 0 0 > 0 0 0 0 0 0 3 >Node 0, zone DMA, type Reserve 0 0 0 0 > 0 0 0 0 0 1 0 >Node 0, zone DMA, type Isolate 0 0 0 0 > 0 0 0 0 0 0 0 >Node 0, zone DMA32, type Unmovable 410 261 133 51 > 24 14 7 2 0 0 0 >Node 0, zone DMA32, type Reclaimable 2573 1806 1108 889 > 522 175 31 0 0 0 0 >Node 0, zone DMA32, type Movable 408 352 345 341 > 328 312 310 260 216 180 356 >Node 0, zone DMA32, type Reserve 0 0 0 0 > 0 0 0 0 0 2 0 >Node 0, zone DMA32, type Isolate 0 0 0 0 > 0 0 0 0 0 0 0 >Node 0, zone Normal, type Unmovable 434 788 518 137 > 58 24 13 4 5 0 0 >Node 0, zone Normal, type Reclaimable 1 110 2136 3212 > 414 25 8 7 8 0 0 >Node 0, zone Normal, type Movable 8135 20535 17946 18171 >15732 12719 9033 4448 1417 169 312 >Node 0, zone Normal, type Reserve 0 0 0 0 > 0 0 0 0 0 0 1 >Node 0, zone Normal, type Isolate 0 0 0 0 > 0 0 0 0 0 0 0 > >Number of blocks type Unmovable Reclaimable Movable >Reserve Isolate >Node 0, zone DMA 1 0 6 >1 0 >Node 0, zone DMA32 11 79 1436 >2 0 >Node 0, zone Normal 188 337 6129 >2 0 > > >When we are running the same application on other system, it comes up. >So, it has to do with memory allocation setting of some sort. > >So, Is there some setting that we can use to allow the kernel to >allocate the 313 - 4M pages that are free for 4k memory allocations? If >so, what should we change on the system? > >Will setting vm.zone_reclaim_mode to 1 help here? > >Do I need to provide more information, if yes, what? > >-- >Thanks, >-aka >http://blog.amit-agarwal.co.in > > >_______________________________________________ >Kernelnewbies mailing list >Kernelnewbies@xxxxxxxxxxxxxxxxx >http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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