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-   Slackware (https://www.linuxquestions.org/questions/slackware-14/)
-   -   The Latest Kernel Release. (https://www.linuxquestions.org/questions/slackware-14/the-latest-kernel-release-4175597503/)

kjhambrick 01-27-2017 05:32 AM
Thanks GazL

Yes, after noting that /lib/modules/$(uname -r)/source and /lib/modules/$(uname -r)/build are symlinks to /usr/src/$(uname -r)/

I was wondering the same thing: i.e. whether I could reinstall VMWare and maybe somehow override /usr/include/linux/ with /usr/src/$(uname -r)/include/ ...

However, that's for another day :)

-- kjh

slalik 01-28-2017 04:52 PM
55020, thanks a lot for config-4.9!

Since you provide kernel-headers-4.9, I'd like to ask: does it mean that you suggest to install it?

I know the standard view that
Quote:
As long as you do not upgrade your glibc package, you should not upgrade or remove the kernel-headers package.
(see, e.g., http://docs.slackware.com/howtos:sla...eaders_package)

On the other hand:
Quote:
Originally Posted by volkerdi (Post 5595940)
As far as I know, I've never encountered any issues with upgrading the kernel headers without recompiling glibc. I'd be interested to hear if anyone ever has, and under what circumstances.

MikelN 01-29-2017 01:16 AM
There's also the option to create a .config based on your system. When you make -localmodconfig the running modules on your system are used as basis for the config. This way you get a streamlined kernel with only support for hardware you have. Before you do this you must make sure you've connected everything you'll need (like USB sticks/external drives with filesystems you use, your webcam, everything you use needs to be there or it won't be included. You even need a DVD/CD in your drive or it won't work.). This greatly reduces the compile time. Since you leave out everything you don't need.

cwizardone 01-29-2017 06:19 PM
Mainline kernel 4.10-rc6 has been released for testing,
https://www.kernel.org/

It is the biggest release candidate of the 4.10 series to date.
http://news.softpedia.com/news/linus...r-512353.shtml

GazL 02-01-2017 07:41 AM
v4.9.7 and v4.4.46 are out.

kjhambrick 02-01-2017 11:38 AM
Thanks GazL.

4.4.46 includes another CVE fix.

-- kjh

Code:
commit 63db7c91a3c0ebe0e291feea53e4c63391db9465
Author: Kees Cook <keescook@chromium.org>
Date:  Tue Jan 24 15:18:24 2017 -0800

    fbdev: color map copying bounds checking
   
    commit 2dc705a9930b4806250fbf5a76e55266e59389f2 upstream.
   
    Copying color maps to userspace doesn't check the value of to->start,
    which will cause kernel heap buffer OOB read due to signedness wraps.
   
    CVE-2016-8405
   
    Link: http://lkml.kernel.org/r/20170105224249.GA50925@beast
    Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
    Signed-off-by: Kees Cook <keescook@chromium.org>
    Reported-by: Peter Pi (@heisecode) of Trend Micro
    Cc: Min Chong <mchong@google.com>
    Cc: Dan Carpenter <dan.carpenter@oracle.com>
    Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
    Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

bamunds 02-02-2017 11:36 AM
4.9.5 with LiveSlack 1.1.5 being used since 1/25/2017 without problems. Installed all pkgs including the headers and have not had any problems slackbuilding other packages. Don't know if that helps answer the question about installing the headers, but just a status report of using all dave's packages.

mats_b_tegner 02-04-2017 05:57 AM
Kernels 4.4.47 and 4.9.8
 
https://cdn.kernel.org/pub/linux/ker...angeLog-4.4.47
https://cdn.kernel.org/pub/linux/ker...hangeLog-4.9.8

GazL 02-04-2017 06:34 AM
Wow, that was quick. I didn't even notice those go through 'review'. Thanks for the heads-up.

cwizardone 02-05-2017 07:13 PM
Kernel 4.10-rc7, is available for testing.

https://www.kernel.org/

ttk 02-05-2017 11:18 PM
Quote:
Originally Posted by bassmadrigal (Post 5659160)
(Pat highly suggests running generic kernels over huge and only provides huge as a starting point.)
This intrigues me, because I've been using only the huge kernel with Slackware since 1996. It's worked okay so far, but am I incurring a risk? What is the reasoning for preferring generic?

cwizardone 02-06-2017 05:14 AM
With older hardware the generic kernel, along with the initrd, provides, IMHO, a noticeable performance improvement. With more "modern," as in faster, processors you may not even notice the difference between running the huge kernel vs. the generic.
:twocents:

bassmadrigal 02-06-2017 06:37 AM
Quote:
Originally Posted by ttk (Post 5665694)
This intrigues me, because I've been using only the huge kernel with Slackware since 1996. It's worked okay so far, but am I incurring a risk? What is the reasoning for preferring generic?
I'm not positive why he recommends that, but I imagine it is similar to what cwizardone mentioned... mainly a slight savings in resources/boot time.

But, Pat's official words can be found in the CHANGES_AND_HINTS.TXT file on your favorite mirror. He requests people to not report bugs unless they can reproduce it on a generic kernel.

Code:
Use one of the provided generic kernels for daily use.  Do not report
  bugs until/unless you have reproduced them using one of the stock
  generic kernels.  You will need to create an initrd in order to boot
  the generic kernels - see /boot/README.initrd for instructions.
  The huge kernels are primarily intended as "installer" and "emergency"
  kernels in case you forget to make an initrd.  For most systems, you
  should use the generic SMP kernel if it will run, even if your system is
  not SMP-capable.  Some newer hardware needs the local APIC enabled in the
  SMP kernel, and theoretically there should not be a performance penalty
  with using the SMP-capable kernel on a uniprocessor machine, as the SMP
  kernel tests for this and makes necessary adjustments.  Furthermore, the
  kernel sources shipped with Slackware are configured for SMP usage, so you
  won't have to modify those to build external modules (such as NVidia or
  ATI proprietary drivers) if you use the SMP kernel.

Didier Spaier 02-06-2017 07:09 AM
Quote:
Originally Posted by ttk (Post 5665694)
This intrigues me, because I've been using only the huge kernel with Slackware since 1996. It's worked okay so far, but am I incurring a risk? What is the reasoning for preferring generic?
Quote:
Originally Posted by bassmadrigal (Post 5665828)
But, Pat's official words can be found in the CHANGES_AND_HINTS.TXT file on your favorite mirror. He requests people to not report bugs unless they can reproduce it on a generic kernel.

Code:
Use one of the provided generic kernels for daily use.  Do not report
  bugs until/unless you have reproduced them using one of the stock
  generic kernels.<snip>
I think that you are both right.

There is generally no issue running a huge kernel. In some cases though this can cause an issue. This could be the case if two kernel drivers claim the same device (this device being selected because it matches a glob that would be e.g. found in the output of "modinfo <module>|grep ^alias:" in case of a module) and the driver that takes over the device is not the "good" one.

If you use a generic kernel you can blacklist one of the drivers and see what happens. That is not possible if the drivers are built in, making difficult to analyze and solve the problem in that case.

So my understanding is : in most cases running a huge kernel is fine, but use a generic kernel if need be. "If need be" includes but is not limited to issues that could be linked to conflicting or "not the good one" kernel drivers, and configurations that need an initrd, like including encrypted partitions.

fsauer 02-07-2017 10:55 AM
huge vs. generic
 
I did some testing here. For me, the huge kernel boots about 3 to 4 seconds (not significantly) faster than the generic kernel. Considering that, I decided not to get into the hassle of initrd construction after kernel upgrades :)

(>5 year old desktop, intel core 5, nvidia, off the shelf sata drive, slackware current)

Obviously, this is only a tiny test...

Have a nice day

Franz


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