On Mon, 15 Jul 2013, nicolas.patr...@gmail.com wrote: > Le 15/07/2013 14:13:08, Henrique de Moraes Holschuh a écrit : > > Please run these as root: > > find /sys/devices/system/cpu -noleaf -type f -path > > '/sys/devices/system/cpu/cpu*/microcode/reload' > > # find /sys/devices/system/cpu -noleaf -type f -path '/sys/devices/ > system/cpu/cpu*/microcode/reload' > /sys/devices/system/cpu/cpu0/microcode/reload > /sys/devices/system/cpu/cpu1/microcode/reload > /sys/devices/system/cpu/cpu2/microcode/reload
Ok, this is fine. > > find /sys/devices/system/cpu -noleaf -type f -path > > '/sys/devices/system/cpu/cpu*/microcode/reload' | while read i ; do > > echo -n 1 >"$i" || true ; done > > I have three cores. What’s this line supposed to do? It is supposed to "echo -n 1" into each of the sysfs files located by the "find" command, ignoring any failures. That signals the kernel to trigger a firmware request for a microcode update in that specific core. We ignore failures, because per-core microcode updates are a design bug, fixed on later kernels by failing all requests but the one to the BSP (boot processor, usually cpu0) and updating all cores at the sime time along with the BSP. Recent kernels have a single sysfs trigger that does this properly, but yours (2.6.38) is too old for that. You need to be root to run that command. So, does it work? Or does it hang? -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
