https://github.com/torvalds/linux
Revision ae3fa8bd73c9b64416816ec0e9951cd8695c9854 authored by Linus Torvalds on 15 February 2019, 16:50:48 UTC, committed by Linus Torvalds on 15 February 2019, 16:50:48 UTC
Pull device mapper fixes from Mike Snitzer: - Fix bug in DM crypt's sizing of its block integrity tag space, resulting in less memory use when DM crypt layers on DM integrity. - Fix a long-standing DM thinp crash consistency bug that was due to improper handling of FUA. This issue is specific to writes that fill an entire thinp block which needs to be allocated. * tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm thin: fix bug where bio that overwrites thin block ignores FUA dm crypt: don't overallocate the integrity tag space
Tip revision: ae3fa8bd73c9b64416816ec0e9951cd8695c9854 authored by Linus Torvalds on 15 February 2019, 16:50:48 UTC
Merge tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Merge tag 'for-5.0/dm-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Tip revision: ae3fa8b
bloat-o-meter
#!/usr/bin/python
#
# Copyright 2004 Matt Mackall <mpm@selenic.com>
#
# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import sys, os, re
from signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE, SIG_DFL)
if len(sys.argv) < 3:
sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])
sys.stderr.write("The options are:\n")
sys.stderr.write("-c categorize output based on symbol type\n")
sys.stderr.write("-d Show delta of Data Section\n")
sys.stderr.write("-t Show delta of text Section\n")
sys.exit(-1)
re_NUMBER = re.compile(r'\.[0-9]+')
def getsizes(file, format):
sym = {}
with os.popen("nm --size-sort " + file) as f:
for line in f:
size, type, name = line.split()
if type in format:
# strip generated symbols
if name.startswith("__mod_"): continue
if name.startswith("__se_sys"): continue
if name.startswith("__se_compat_sys"): continue
if name.startswith("__addressable_"): continue
if name == "linux_banner": continue
# statics and some other optimizations adds random .NUMBER
name = re_NUMBER.sub('', name)
sym[name] = sym.get(name, 0) + int(size, 16)
return sym
def calc(oldfile, newfile, format):
old = getsizes(oldfile, format)
new = getsizes(newfile, format)
grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
delta, common = [], {}
otot, ntot = 0, 0
for a in old:
if a in new:
common[a] = 1
for name in old:
otot += old[name]
if name not in common:
remove += 1
down += old[name]
delta.append((-old[name], name))
for name in new:
ntot += new[name]
if name not in common:
add += 1
up += new[name]
delta.append((new[name], name))
for name in common:
d = new.get(name, 0) - old.get(name, 0)
if d>0: grow, up = grow+1, up+d
if d<0: shrink, down = shrink+1, down-d
delta.append((d, name))
delta.sort()
delta.reverse()
return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
def print_result(symboltype, symbolformat, argc):
grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)
print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
(add, remove, grow, shrink, up, -down, up-down))
print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
for d, n in delta:
if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
if otot:
percent = (ntot - otot) * 100.0 / otot
else:
percent = 0
print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
if sys.argv[1] == "-c":
print_result("Function", "tT", 3)
print_result("Data", "dDbB", 3)
print_result("RO Data", "rR", 3)
elif sys.argv[1] == "-d":
print_result("Data", "dDbBrR", 3)
elif sys.argv[1] == "-t":
print_result("Function", "tT", 3)
else:
print_result("Function", "tTdDbBrR", 2)
Computing file changes ...