[OE-core] [PATCHv3 4/6] sanity.bbclass: Check for /proc/sys/vm/mmap_min_addr to be >= 65536

[Khem Raj]

On Thu, Mar 3, 2011 at 4:13 AM, Richard Purdie
<richard.purdie at linuxfoundation.org> wrote:
> On Thu, 2011-03-03 at 08:15 +0100, Martin Jansa wrote:
>> On Wed, Mar 02, 2011 at 10:52:45PM -0800, Khem Raj wrote:
>> > * Now qemu can handle lower values we can chnage this sanity test
>> >   to check of values if less than 65536
>> >
>> > Signed-off-by: Khem Raj <raj.khem at gmail.com>
>> > ---
>> >  meta/classes/sanity.bbclass |   10 ++++++----
>> >  1 files changed, 6 insertions(+), 4 deletions(-)
>> >
>> > diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
>> > index 13940f8..aae5028 100644
>> > --- a/meta/classes/sanity.bbclass
>> > +++ b/meta/classes/sanity.bbclass
>> > @@ -170,10 +170,12 @@ def check_sanity(e):
>> >          # This path is no longer user-readable in modern (very recent) Linux
>> >          try:
>> >              if os.path.exists("/proc/sys/vm/mmap_min_addr"):
>> > -                f = file("/proc/sys/vm/mmap_min_addr", "r")
>> > -                if (f.read().strip() != "0"):
>> > -                        messages = messages + "/proc/sys/vm/mmap_min_addr is not 0. This will cause problems with qemu so please fix the value (as root).\n\nTo fix this in later reboots, set vm.mmap_min_addr = 0 in /etc/sysctl.conf.\n"
>> > -                f.close()
>> > +                f = open("/proc/sys/vm/mmap_min_addr", "r")
>> > +                try:
>> > +                    if (int(f.read().strip()) < 65536):
>> > +                        messages = messages + "/proc/sys/vm/mmap_min_addr is not >= 65536. This will cause problems with qemu so please fix the value (as root).\n\nTo fix this in later reboots, set vm.mmap_min_addr = 65536 in /etc/sysctl.conf.\n"
>> > +                finally:
>> > +                    f.close()
>> >          except:
>> >              pass
>> >
>>
>> corner cases when it cannot be read are with kernel between
>>
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0e1a6ef2dea88101b056b6d9984f3325c5efced3
>> 2.6.33-rc2-0e1a6ef2dea88101b056b6d9984f3325c5efced3
>>
>> and
>>
>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=822cceec7248013821d655545ea45d1c6a9d15b3
>> 2.6.34-rc3-822cceec7248013821d655545ea45d1c6a9d15b3
>>
>> see:
>> http://www.mail-archive.com/openembedded-devel@lists.openembedded.org/msg02340.html
>>
>> Don't know if any large distribution is using 2.6.34 without that 2nd
>> patch backported.
>
> My laptop at least is running a kernel where that file isn't
> readable :/. It isn't a standard distro one though.
>

see v3