[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] RFC: 32 bits as smallest atomic size.
>>>>> "IP" == Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx> writes: >> Right now there is a single problematic cmpxchg user, >> grant_entry_t, and the impact of the fix is tiny (make the >> 'flags' member 4 bytes). Is that too large an inconvenience? IP> That would make grant table entries 12 bytes rather than 8 bytes, which IP> is not ideal given that you can end up needing quite a lot of them, IP> particularly when the cacheline packing is considered. Actually, the lock field can be 1 bit for all I care, as long as the atomic method to change it word sized. This is quite a reasonable request. -JX _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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