linux-kernel - RE: [PATCH rcu 3/6] rcu/rcuscale: Move rcu_scale_*() after kfree_scale

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Date:   Sun, 14 May 2023 13:38:25 +0000
From:   "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>
To:     "paulmck@...nel.org" <paulmck@...nel.org>
CC:     Joel Fernandes <joel@...lfernandes.org>,
        "rcu@...r.kernel.org" <rcu@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-team@...a.com" <kernel-team@...a.com>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>
Subject: RE: [PATCH rcu 3/6] rcu/rcuscale: Move rcu_scale_*() after
 kfree_scale_cleanup()

> From: Paul E. McKenney <paulmck@...nel.org>
> ...
> > > Here is one way to script this, where "SHA" identifies the commit to
> > > be checked and PATHS the affected pathnames:
> > >
> > > 	git checkout SHA^
> > > 	git show SHA | git apply -
> > > 	git blame -M PATHS | grep '^0* '
> >
> > Cool ~. Thank you, Paul.
> > I took them and made them into a script below for future use ;-)
> 
> Nice!!!
> 
> > #!/bin/bash
> >
> > SHA=$1
> >
> > if [ -z "$SHA" ]; then
> >     echo "Usage: $0 <commit-id>"
> >     exit 1
> > fi
> >
> > if ! git cat-file -t "$SHA" &> /dev/null; then
> >         echo "$SHA does not exist in the repository"
> >         exit 1
> > fi
> 
> You might want to record the current position so that you can return to it
> automatically.  One approach is to parse the output of "git status".
> 
> > git checkout ${SHA}^ &> /dev/null
> > git show ${SHA} | git apply - &> /dev/null
> >
> > PATHS=`git status| grep "modified:" | cut -d: -f2 | xargs`
> 
> The '--porcelain' argument makes 'git status' is a bit easier to parse robustly.
> 
> > for P in ${PATHS}; do
> >         R=`git blame -M $P | grep '^0* '`
> 
> You can avoid any bash-variable length limitations by using 'grep -q' and
> capturing the exit status using "$?".
> 

Thank you, Paul, for all the enhancement suggestions. ;-)

> 							Thanx, Paul
> 
> ...