Your message dated Mon, 10 Aug 2015 21:22:13 +1000 with message-id <[email protected]> and subject line fixed in procps 3.3.3 has caused the Debian Bug report #674922, regarding [top] top crashes if hotplug cpu core is removed to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 674922: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=674922 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: procps Version: 1:3.2.8-9 Severity: normal The hardware is a mobile phone: HTC Sensation. Base software is Android 2.3.5 Above Android, I have installed Debian Stable, using LinuxInstaller by Galoula; it's doing debootstrap in a chroot. The CPU has a strange feature: it's dual core, but works a different way than my laptop; does not just do freq scaling, but completely shuts the core off on idle time. On idle time: root@DHP-ARMEL:~# cat /proc/cpuinfo Processor : ARMv7 Processor rev 2 (v7l) processor : 0 BogoMIPS : 13.53 Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 CPU implementer : 0x51 CPU architecture: 7 CPU variant : 0x0 CPU part : 0x02d CPU revision : 2 Hardware : pyramid Revision : 0080 EngineerID : 0007 Serial : 0000000000000000 root@DHP-ARMEL:~# on busy time: root@DHP-ARMEL:~# cat /proc/cpuinfo Processor : ARMv7 Processor rev 2 (v7l) processor : 0 BogoMIPS : 13.53 processor : 1 BogoMIPS : 13.53 Features : swp half thumb fastmult vfp edsp thumbee neon vfpv3 CPU implementer : 0x51 CPU architecture: 7 CPU variant : 0x0 CPU part : 0x02d CPU revision : 2 Hardware : pyramid Revision : 0080 EngineerID : 0007 Serial : 0000000000000000 root@DHP-ARMEL:~# If top is started in iddle time, the pressing '1' on busy time will show only one core: top - 18:34:25 up 1 day, 19:11, 10 users, load average: 11.39, 8.95, 8.09 Tasks: 314 total, 5 running, 307 sleeping, 0 stopped, 2 zombie Cpu0 : 5.0%us, 94.6%sy, 0.0%ni, 0.0%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 627676k total, 609084k used, 18592k free, 3448k buffers Swap: 0k total, 0k used, 0k free, 91492k cached If top is started on busy time, it will show correctly both cores: top - 18:35:54 up 1 day, 19:13, 10 users, load average: 11.79, 9.72, 8.44 Tasks: 312 total, 3 running, 307 sleeping, 0 stopped, 2 zombie Cpu0 : 11.9%us, 88.1%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 4.5%us, 95.5%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 627676k total, 606536k used, 21140k free, 5812k buffers Swap: 0k total, 0k used, 0k free, 102020k cached Whether it's showing both cores or not, if it's started on busy time, when Android will shut down the second core, top will crash: 111 root 20 0 0 0 0 D 1 0.0 3:40.08 emmc-qd 7 root 20 0 0 0 0 S 0 0.0 10:25.33 events/0 top: failed /proc/stat read root@DHP-ARMEL:~# Conclusion: top does read the number of cores only at start, and then, assumes this number will stay fixed. This is bad. Does not support the number of cores to change. I am very surprised, because CPU hotplug is a very old feature, and Linux does support it since ages; either nobody ever used top on a CPU hotplug capable machine, or, this CPU is working a different way than traditionnal CPU hotplug machines. To test this bug, any mobile device with multi-core should do; not just ARM but bug should also happen on Intel machines. -- System Information: Debian Release: 6.0.2 APT prefers stable APT policy: (500, 'stable') Architecture: armel (armv7l) Kernel: Linux 2.6.35.13-gc35910f (SMP w/1 CPU core; PREEMPT) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C) Shell: /bin/sh linked to /bin/dash Versions of packages procps depends on: ii initscripts 2.88dsf-13.1 scripts for initializing and shutt ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib ii libgcc1 1:4.4.5-8 GCC support library ii libncurses5 5.7+20100313-5 shared libraries for terminal hand ii libncursesw5 5.7+20100313-5 shared libraries for terminal hand ii lsb-base 3.2-23.2squeeze1 Linux Standard Base 3.2 init scrip Versions of packages procps recommends: ii psmisc 22.11-1 utilities that use the proc file s procps suggests no packages. -- no debconf information
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--- Begin Message ---Package: procps Version: 1:3.3.3-1 This top crash was fixed in procps upstream 3.3.3 -- Craig Small (@smallsees) http://enc.com.au/ csmall at : enc.com.au Debian GNU/Linux http://www.debian.org/ csmall at : debian.org GPG fingerprint: 5D2F B320 B825 D939 04D2 0519 3938 F96B DF50 FEA5
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