This patch replaces:
- {var}>... redirections with functionally identical eval construct +
explicit FDs
- ^^ and ,, case modifiers with temporary shopt
This allows us to lower minimum required bash version
to at least 3.1 (with current code).
Signed-off-by: Michal Soltys <soltys@ziu.info>
Filtering modules requires enough work that instmods() in the
next pipeline stage was rarely busy. Parallelize the two
filters which do the most work. Also fix a filename-vs-contents
mistake in net_module_filter.
--
John Reiser, jreiser@BitWagon.com
>From f4533a2ceca52c443ddebec01eeaa35d51c39c1b Mon Sep 17 00:00:00 2001
From: John Reiser <jreiser@BitWagon.com>
Date: Tue, 13 Sep 2011 17:41:43 -0700
Subject: [PATCH 1/3] Parallelize block_module_filter
Use bash "[[ string =~ pattern ]]" instead of "egrep -q".
Replace control-dominated serial fondling
for var in $(proc1); do proc2 var; done
with data-dominated parallel pipeline
proc1 | while read var; do proc2 var; done
Together this is a large savings.
[harald@redhat.com: fixed network kernel module filter]
Harald Hoyer