milabs

http://people.ee.ethz.ch/~arkeller/linux/kernel_user_space_howto.html

milabs

#rename local branch
git branch -m old-branch-name new-branch-name

#delete remote branch with old name
git push origin :old-branch-name

#create remote renamed branch
git push origin new-branch-name

milabs

sar -u 1 | grep --line-buffered all | awk -W interactive '{printf("%s %s\n", $1, $5);}'

milabs

int __attribute__((section(".khook_origin,\"awx\",@progbits#"))) function(void) { ... }

milabs

Q: Git fails when pushing commit to github
A: git config --global http.postBuffer 524288000

$ man git config

http.postBuffer
    Maximum size in bytes of the buffer used by smart HTTP transports when POSTing data to the remote system. For
    requests larger than this buffer size, HTTP/1.1 and Transfer-Encoding: chunked is used to avoid creating a
    massive pack file locally. Default is 1 MiB, which is sufficient for most requests

milabs

git format-patch --cover-letter --attach --stdout -2 --subject-prefix="..." --to=<...> | formail -ds >> $HOME/.thunderbird/k350j4w1.default/Mail/Local\ Folders/Drafts

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# echo "chromium-browser hold" | sudo dpkg --set-selections
# dpkg --get-selections | grep chromium...
# echo "chromium-browser install" | sudo dpkg --set-selections

milabs

Q: Where to get debug symbols for kernel X?

A: http://ddebs.ubuntu.com/pool/main/l/linux/

codename=$(lsb_release -c | awk  '{print $2}')
sudo tee /etc/apt/sources.list.d/ddebs.list << EOF
deb http://ddebs.ubuntu.com/ ${codename}      main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-security main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-updates  main restricted universe multiverse
deb http://ddebs.ubuntu.com/ ${codename}-proposed main restricted universe multiverse

milabs

/*
 * memset_volatile is a volatile pointer to the memset function.
 * You can call (*memset_volatile)(buf, val, len) or even
 * memset_volatile(buf, val, len) just as you would call
 * memset(buf, val, len), but the use of a volatile pointer
 * guarantees that the compiler will not optimise the call away.
 */
void * (* volatile memset_volatile)(void *, int, size_t) = memset;

milabs

use URI::Fetch;
use Cache::File;
use HTTP::Status qw(:constants);

$url = 'http://127.0.0.1:8080/media/snapshot.json.gz';

$cache = Cache::File->new(cache_root => '/tmp/cache');
$response = URI::Fetch->fetch($url, ForceResponse => 1, Cache => $cache);

if ($response->http_status == HTTP_OK) {