These dock workers also held skeptical views of unions generally, associating them with corruption, the former employee said. Some cited fear that voting for a union would mean a constant battle with management they would rather avoid.Ī group of warehouse dock employees who do heavy lifting were against the unionization effort and appreciated Amazon's current benefits, which include receiving health insurance upon hiring, according to one of the former fulfillment center employees. They do have wonderful benefits." And young employees "don't feel they need a union because they’re not putting health and safety at risk as much." Some cited Amazon's above-average wages, and better working conditions overall than other local employers.ĭenean Plott, 56, who picked customer orders at the warehouse until March and voted for the union, said, "It is a good paying job. Many younger workers, lacking experience with unions and knowledge of labor history, were never persuaded of the benefits of organizing, these people said. The union did not immediately comment on the claim.īut some warehouse workers pointed to shortcomings in the union drive. You would never be able to get away with running more VMs than you have cores available, which is something I would expect to be done on "low load" servers as many systems sit idle for 90% of their life.And in one of the mandatory meetings, presentations asserted union leaders used membership dues for improper purposes such as expensive cars and vacations, a former employee at the company's warehouse told Reuters. ![]() The only real ways to block this attack would be to "force" the host and VMs to only use certain cores so that they are never running on the same hardware but this would lead to an effective increase in cost as you would not be able to have as many VMs on a given host. If you wanted a "secure" VM then you have to guarantee that it's cores are isolated. Given enough time and some suitably stealthy software everything is potentially open. Yes, it is by no means easy and is a difficult thing to pull off as the VM CPU core could change at whim of the host and the host could happily schedule tasks on different cores as well, but over a long period of time enough information could be leaked to give up a secret key to some important system or account. From host to VM, from VM to host, and from VM to VM. In this way it means that a machine is exploitable in every direction. ![]() Then it can use precise timing to watch the caches for particular patterns of access indicative of the host or guest (or other VM) process that it is looking to exploit. So, because the VM runs in actual CPU hardware and all it needs to do is run a particular loop to "train" the speculative execution engine. In this way, memory belonging to the victim process is leaked to the malicious process. Then by the side-channel, retrieves the value of this memory. In a nutshell, the predictor is coerced to predict a specific branch result (if -> true), that results in asking for an out-of-bound memory access that the victim process would not normally have requested, resulting in incorrect speculative execution. In this attack, the attacker tricks the speculative execution to predictively execute instructions erroneously. Spectre works on a different level and does not allow access to kernel-space data from user-space. Things like qemu can do emulation which would be safer as it is not a hardware CPU, but it is much slower and is different from virtualization.įrom the canonical post again: ![]() Virtualization is only fast because it uses the physical CPU with as little abstraction as possible and relies on CPU hardware to provide isolation. It is essentially just another layer within the physical CPU in your system. It uses the same caches and instructions as the host does. VMs use the actual CPU in your system with some privileged instructions trapped and able to be redirected. Spectre works with containers, as containers relies on the host
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