Em Fri, Jul 03, 2015 at 06:21:48PM +0800, Hou Pengyang escreveu: > On 2015/6/30 22:50, Arnaldo Carvalho de Melo wrote: > >Well, we _can_ detect this automatically, its just a matter of parsing > >/proc/PID/smaps, right?
<SNIP> > >What I was discussing was a way only parse smaps when we know we need > >to, i.e. when we, for instance, parsing /proc/PID/maps, find a map that > >we think may be a hugetlb one, maybe some other way to tell us that > >hugetlb maps are in place, looking at the hugetlbfs stats somehow? <SNIP> > from /proc/self/mounts, we can get mount point of hugetlbfs. > in my system, it is "/mnt/huge". So that, when mmap2 event > comes from userspace, we can compare prefix of filename with > hugetlbfs mount point (e.g "/mnt/huge") to check if it is a > file in hugetlbfs. if it is, set MAP_HUGELTB, otherwise, not set. > There is no need to parse /proc/PID/smaps now, what's more, > it is not difficult to parse "/proc/self/mounts". A-ha! please take a look at using the find_mountpoint() function in tools/lib/api/fs/, I guess that should be enough for you? - Arnaldo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
