Re: One problem in reassign pci bus number?
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On Sun, May 6, 2012 at 8:17 AM, Richard Yang <weiyang@xxxxxxxxxxxxxxxxxx> wrote: > On Fri, May 04, 2012 at 10:37:08AM -0700, Yinghai Lu wrote: >>On Thu, May 3, 2012 at 9:52 PM, Richard Yang <weiyang@xxxxxxxxxxxxxxxxxx> wrote: >>> >>> BTW, even if this value is returned by __find_res_top_free_size(), or >>> returned after this function is called, the purpose of the >>> __find_res_top_free_size() is to get the biggest free space under the >>> first parameter? >> >>__find_res_top_free_size() is used to get size just under top, and >>then use it to calculate size above top that need to be extended. >> >>at last will combine free size under top and allocated size above top >>and return. > Yes, I get the general idea. > > then I want to confirm which size __find_res_top_free_size() will return. > > Come to the previous question, for one resource like this. > res = 90-150 > ->child 105-140 > We call __find_res_top_free_size(res, 1); > This function should return which size? 10? 15? or 25? > > From the code > + ret = __allocate_resource(res, &tmp_res, n_size, > + res->end - n_size + skip_nr, res->end, > + 1, NULL, NULL, false); > I think it will check the free space near the end of res. yes. it is 15, [141-150] -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html