[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Xen 4.1 rc1 test report
> Performance(1 bug) > 1. guest boot very slowly without limit dom0 cpu number on EX (Intel) > http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1719 > This bug happened 1 year before. Keir has made a fix with c/s 20841, which essentially holds the locked (and hence allocated) hypercall page so that next hypercall can reuse it without doing alloc and mlock again. By doing this, overhead of rschedule IPI as a result of frequent mlock is greatly reduced. Late in year 2010, libxc introduced a new mechanism called hypercall buffers, as you can refer c/s 22288~22312. Keir's fix is dropped in this new framework. As a result, the bug appears again. Probably the new framework auther can pick up Keir's fix again? Shan Haitao _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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