[lkml]   [2019]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [RFC] Deadlock via recursive wakeup via RCU with threadirqs
Hi Steve,

> As Paul stated, interrupts are synchronization points. Archs can only
> play games with ordering when dealing with entities outside the CPU
> (devices and other CPUs). But if you have assembly that has two stores,
> and an interrupt comes in, the arch must guarantee that the stores are
> done in that order as the interrupt sees it.

Hopefully I'm not derailing the conversation too much with my questions
... but I was wondering if we had any documentation (or inline comments)
elaborating on this "interrupts are synchronization points"?


 \ /
  Last update: 2019-06-29 17:13    [W:0.153 / U:1.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site