lkml.org 
[lkml]   [2019]   [Mar]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v4] kmemleak: survive in a low-memory situation
From
Date
On Thu, 2019-03-28 at 15:05 +0000, Catalin Marinas wrote:
> > It takes 2 runs of LTP oom01 tests to disable kmemleak.
>
> What configuration are you using (number of CPUs, RAM)? I tried this on
> an arm64 guest under kvm with 4 CPUs and 512MB of RAM, together with
> fault injection on kmemleak_object cache and running oom01 several times
> without any failures.

Apparently, the CPUs are so fast and the disk is so slow (swapping). It ends up
taking a long time for OOM to kick in.

# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
CPU(s):              48
On-line CPU(s) list: 0-47
Thread(s) per core:  2
Core(s) per socket:  12
Socket(s):           2
NUMA node(s):        2
Vendor ID:           GenuineIntel
CPU family:          6
Model:               85
Model name:          Intel(R) Xeon(R) Gold 6126T CPU @ 2.60GHz
Stepping:            4
CPU MHz:             3300.002
BogoMIPS:            5200.00
Virtualization:      VT-x
L1d cache:           32K
L1i cache:           32K
L2 cache:            1024K
L3 cache:            19712K
NUMA node0 CPU(s):   0-11,24-35
NUMA node1 CPU(s):   12-23,36-47

# free -m
              total        used        free      shared  buff/cache   available
Mem:         166206       31737      134063          33         406      133584
Swap:          4095           0        4095

# lspci | grep -i sata
00:11.5 SATA controller: Intel Corporation C620 Series Chipset Family SSATA
Controller [AHCI mode] (rev 08)
00:17.0 SATA controller: Intel Corporation C620 Series Chipset Family SATA
Controller [AHCI mode] (rev 08)

\
 
 \ /
  Last update: 2019-03-28 16:43    [W:0.068 / U:6.296 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site