Roland Dreier wrote: > > Maybe we should use the /proc/pid/pagemap and /proc/kpageflags files? > > These files let a userspace process find out which physical frame > > each virtual page is mapped to and to get the properties of each page > > frame including the page size. > > Sounds interesting... the only problem is that /proc/kpageflags is > root-only, so we can't use that. But does /proc/pid/pagemap give enough > information to be useful?
The most useful information that /proc/pid/pagemap provides the PFN (if the page is not swapped out). In fact there is very useful tool called Documentation/vm/page-types.c which gives a lot of the information that we need. Again the caveat is that it uses /proc/kpageflags. /proc/pid/pagemap also provided "page shift". I am not sure what that is in the context of huge pages. > > > The disadvantage of this method is, that it applicable on kernel >= > > 2.6.25, since this interface is supported starting from the kernel > > 2.6.25. > > I think that's OK Pradeep -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
