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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] Atomic Instructions - comments please |
| Date: | Mon, 15 Dec 2014 14:46:59 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
On 15/12/2014 14:39, Peter Maydell wrote: >> > >> > How would "add a mutex" work unless you add a mutex or CAS to each and >> > every qemu_st operation? > Same way our current approach works -- we simply don't implement > "stores interrupt ll/sc operations": only a store-conditional > can break a load-locked's lock. In practice this works ok > because the stereotypical sequences that guests use don't rely > on this part of the spec. Makes sense, thanks! Paolo
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