Re: [PATCH 0/8] Volatile Ranges (v8?)

From: Dhaval Giani
Date: Tue Jun 18 2013 - 12:59:26 EST

On 2013-06-18 12:11 AM, Minchan Kim wrote:
Hello Dhaval,

On Mon, Jun 17, 2013 at 12:24:07PM -0400, Dhaval Giani wrote:
Hi John,

I have been giving your git tree a whirl, and in order to simulate a
limited memory environment, I was using memory cgroups.

The program I was using to test is attached here. It is your test
code, with some changes (changing the syscall interface, reducing
the memory pressure to be generated).

I trapped it in a memory cgroup with 1MB memory.limit_in_bytes and hit this,

[ 406.207612] ------------[ cut here ]------------
[ 406.207621] kernel BUG at mm/vrange.c:523!
[ 406.207626] invalid opcode: 0000 [#1] SMP
[ 406.207631] Modules linked in:
[ 406.207637] CPU: 0 PID: 1579 Comm: volatile-test Not tainted
Thanks for the testing!
Does below patch fix your problem?

Yes it does! Thank you very much for the patch.

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