System-wide Memory Management for Linux Embedded …
System-wide Memory Management for Linux Embedded Systems
Revision 1.0
Presented by: Howard Cochran cochran@ Lexmark International
at: Embedded Linux Conference February, 2013
Agenda
The Problem:
? How Linux kernel manages memory
? Memory challenges in Lexmark devices
? Limitations of glibc malloc for embedded
Our Solution:
? membroker service ? ANR malloc & gmalloc ? track_fs
We're publishing these as Free (Libre) Software!
? Configuration
Q&A
Embedded Linux Conference 2013
2
Memory Use ? No memory pressure
Locked in RAM
Locked in RAM - Unevictable Kernel RAM Locked in RAM - Anonymous RAM (Evictable) Kernel slab cache (Evictable) Mapped Page Cache (Evictable) Unmapped Page Cache & Buffers Unused
Embedded Linux Conference 2013
3
Memory Use ? Light Pressure
Locked in RAM
Locked in RAM - Unevictable Kernel RAM Locked in RAM - Anonymous RAM (Evictable) Kernel slab cache (Evictable) Mapped Page Cache (Evictable) Unmapped Page Cache & Buffers Unused
Embedded Linux Conference 2013
4
Memory Use ? Anonymous Growing
Locked in RAM
Locked in RAM - Unevictable Kernel RAM Locked in RAM - Anonymous RAM (Evictable) Kernel slab cache (Evictable) Mapped Page Cache (Evictable) Unmapped Page Cache & Buffers Unused
Embedded Linux Conference 2013
5
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