On Sun, May 6, 2012 at 9:35 AM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote: > 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] should 10, aka [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
