Re: Processes receive SIGSEGV if TCQ is enabled

[Andrew Morton]

Thomas Schlichter <schlicht@xxxxxxxxxxxxxxx> wrote:
>
>  today I tried to test TCQ with the linux-2.6.0-test9-mm1 kernel. The config.gz 
>  is attached. But after enabling TCQ with 'hdparm -Q1 /dev/hda' newly started 
>  processes die due to a received SIGSEGV. No bad kernel messages appear...

Probably we need to turn off TCQ in kernel config until the confidence
level is higher.

>  Disabling TCQ again doesn't help, only e reboot does...

That will be because you have incorrect program text in pagecache, left
over from when the driver was in TCQ mode.

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