Amit Shah wrote: >> No flags, assume it's a streaming protocol and don't assume anything >> about message sizes. IOW, when you send clipboard data, send size and >> then the data. QEMU consumes bytes until it reaches size. >> > > Same intent but a different method: I'll have to specify that particular > data is "size" and that data after this special data is the actual data > stream. >
Sounds like every stream protocol in existence :-) >>> - A lock has to be introduced to fetch one unused buffer from the list >>> and pass it on to the host. And this lock has to be a spinlock, just >>> because writes can be called from irq context. >>> >> I don't see a problem here. >> > > You mean you don't see a problem in using a spinlock vs not using one? > Right. This isn't a fast path. > Userspace will typically send the entire buffer to be transmitted in one > system call. If it's large, the system call will have to be broken into > several. This results in multiple guest system calls, each one to be > handled with a spinlock held. > > Compare this with the entire write handled in one system call in the > current method. > Does it matter? This isn't a fast path. Regards, Anthony Liguori _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linux-foundation.org/mailman/listinfo/virtualization
