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ZRAM + Qemu + KSM = system hang #112

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
> What steps will reproduce the problem?
1. Qemu + KSM + ZRAM = system hangs 
2. when Zram works hard to compress pages 

> What version of the product are you using? On what operating system?
Slackware 14.1 , kernel 3.10.33 with original Slackware .config but with 
enabled ZRAM
(zram is disabled by default)

> Please provide any additional information below.

I do not think that the issue is caused by qemu or ksm as sometime the system 
can hang just in a case when the pages are swapped to zram0. 
I do not have any log or so as I need to do the hot reboot (reset) of the 
system to make it works again. 

Please let me know how to collect the necessary logs for investigation the 
issue.

Original issue reported on code.google.com by ualinu...@gmail.com on 10 Mar 2014 at 10:00

GoogleCodeExporter commented 9 years ago 
Please don't use compcache/zram code from this site. All the development 
happens on the mainline kernel (zram is going to be part of upcoming 3.14 
kernel). So, please use that mainline version instead and report bugs at LKML 
(CC'ing all the maintainers) for a quicker resolution.

Original comment by nitingupta910@gmail.com on 10 Mar 2014 at 10:25