[linux-signed] 05/09: debian/bin/sign.py: Reduce heap size to speed up fork()

[debian-kernel at lists.debian.org]

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benh pushed a commit to branch master
in repository linux-signed.

commit 8bccafc88ff392866035069c28e887fd644a0b3f
Author: Ben Hutchings <ben at decadent.org.uk>
Date:   Sat Apr 16 00:33:06 2016 +0100

    debian/bin/sign.py: Reduce heap size to speed up fork()
---
 debian/bin/sign.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/debian/bin/sign.py b/debian/bin/sign.py
index f46e245..6f147ab 100755
--- a/debian/bin/sign.py
+++ b/debian/bin/sign.py
@@ -5,6 +5,7 @@ sys.path.append(sys.argv[1] + "/lib/python")
 
 import os, os.path, shutil, subprocess, tempfile
 import deb822, codecs, gzip, hashlib, io, re, struct, urllib.parse, urllib.request
+import gc
 
 from debian_linux.config import ConfigCoreDump
 from debian_linux.debian import VersionLinux
@@ -66,7 +67,10 @@ def get_packages_data(mirror, suite, arch):
         # Make a dictionary of per-package data
         _packages_data[arch] = data = {}
         for package_data in deb822.Packages.iter_paragraphs(packages_stream):
-            data[package_data['Package']] = package_data
+            name = package_data['Package']
+            # Filter so the heap doesn't become huge
+            if name.startswith('linux-image-'):
+                data[name] = package_data
 
     return _packages_data[arch]
 
@@ -184,6 +188,9 @@ def sign(config_name, imageversion_str, modules_privkey_name, modules_cert_name,
                 package_dir = get_package(mirror_url, suite,
                                           package_name, imageversion_str, arch)
 
+                # Shrink the heap before we start forking children
+                gc.collect()
+
                 signature_dir = os.path.join('debian/signatures', package_name)
                 os.makedirs(signature_dir)
                 sign_modules(kbuild_dir,

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