Conversation

Notices

1. Embed this notice
   external quantum efficiency (eqe@aleph.land)'s status on Friday, 29-Mar-2024 13:23:13 JST external quantum efficiency

   in reply to

   @chjara on my pet embedded system (amd64 running ancient 4.x Linux with 4gb ram) calling malloc(1mb) repeatedly runs for about 600,000 iterations, at which point the VSS is 586 GB and the RSS is 2.2 GB, then the kernel OOMs and kills it.

   There's more than a GB used up during the process that doesn't get accounted to the hungry thread, which is an interesting bug.

   At its peak, the /proc/<pid>/status says VmPTE: 759592 kB, almost a gig of in kernel data structures keeping track of my garbage...

   • Haelwenn /элвэн/ :triskell: likes this.
   • Embed this notice
     external quantum efficiency (eqe@aleph.land)'s status on Friday, 29-Mar-2024 13:23:14 JST external quantum efficiency

     @chjara the first thing is you'll run out of page table ram. Also most kernels have limits on the number of mappings they will give you.