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46413cedf7
freebsd-dev/libexec
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Xin LI 46413cedf7 Reduce disk write load in /usr/libexec/save-entropy. 
Before this commit, the save-entropy script rotates entropy files
like logs. This involves creating a new file that holds the entropy
and renaming of all existing entropy files. However, the entropy
data do not really need to be kept in a particular order, and
replacing the oldest file is sufficient.

This commit replaces the rotation with a scan in the
[1..entropy_save_num] space that finds the first empty slot, or
the slot of the oldest file, and writes entropy into that slot.

This also fixes an issue that prevents save-entropy from saving
any entropy when there is one non-regular file in any slot as a
side effect.

Based on an earlier patch from peterj@.

PR:		134225
Reported by:	peterj
Reviewed by:	csprng (cem, markm)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D22612
2019-11-30 20:06:53 +00:00
..
atf Another round of attempting to squelch -Wdeprecated-declarations, which 2019-09-17 06:07:08 +00:00
atrun libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
blacklistd-helper DIRDEPS_BUILD: Connect new directories and update dependencies. 2016-06-03 19:25:30 +00:00
bootpd Restore WARNS?=1 here. I missed that libexec/bootpd/bootpgw existed. 2019-07-19 18:47:13 +00:00
comsat General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
dma Replace send-mail with the more standarized sendmail, we do not create 2017-12-27 06:23:50 +00:00
fingerd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
flua flua: newer GCC complains about format-nonliteral at WARNS=2 2019-11-19 00:02:56 +00:00
ftpd Move ftpusers to libexec/ftpd/ 2018-08-21 17:07:52 +00:00
getty Fix potential buffer overflow and undefined behavior. 2019-01-26 20:43:28 +00:00
hyperv hyperv: Add VF bringup scripts and devd rules. 2017-07-31 07:18:15 +00:00
mail.local DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
makewhatis.local makewhatis: do not try to operate on read-only mounted directories 2018-10-27 17:15:58 +00:00
mknetid General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
pppoed libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rbootd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rc ldconfig: fetch hw.machine_arch only once 2019-11-30 17:30:01 +00:00
revnetgroup General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rquotad This exposes ZFS user and group quotas via the normal 2018-07-05 22:56:13 +00:00
rpc.rstatd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rusersd General further adoption of SPDX licensing ID tags. 2017-11-20 19:49:47 +00:00
rpc.rwalld libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rpc.sprayd rpc.sprayd: raise WARNS to 6 2018-03-05 16:11:07 +00:00
rtld-aout libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
rtld-elf [PowerPC] Fix stack padding issue on ppc32. 2019-11-24 06:43:03 +00:00
rtld-elf32 libcompat: Correct rtld MLINKS 2019-11-12 22:31:59 +00:00
save-entropy Reduce disk write load in /usr/libexec/save-entropy. 2019-11-30 20:06:53 +00:00
smrsh DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
talkd Remove All Rights Reserved 2019-02-05 21:37:34 +00:00
tcpd DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
telnetd DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
tests Merge ^/user/ngie/release-pkg-fix-tests to unbreak how test files are installed 2016-05-04 23:20:53 +00:00
tftp-proxy DIRDEPS_BUILD: Update dependencies. 2017-10-31 00:07:04 +00:00
tftpd Drop "All rights reserved" from the files I own 2019-03-11 22:23:56 +00:00
ulog-helper libexec: adoption of SPDX licensing ID tags. 2017-11-27 15:25:02 +00:00
ypxfr spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
Makefile Add flua to the base system, install to /usr/libexec 2019-11-18 23:21:13 +00:00
Makefile.amd64 HYPERV isn't available on all architectures, but just on by default 2014-10-16 00:33:06 +00:00
Makefile.i386 HYPERV isn't available on all architectures, but just on by default 2014-10-16 00:33:06 +00:00
Makefile.inc