Re: [RFC][PATCH] 9p: add readahead support for loose mode

2007-09-16 Thread Peter Zijlstra
On Sat, 15 Sep 2007 03:41:26 -0700 Andrew Morton <[EMAIL PROTECTED]> wrote: > eww, kmap. Large amounts of them, apparently. > > Be aware that kmap is a) slow and b) deadlockable. The latter happens when > multiple tasks want to take more than one kmap simultaneously: they all > wait for someone

Re: [RFC][PATCH] 9p: add readahead support for loose mode

2007-09-15 Thread Andrew Morton
On Fri, 14 Sep 2007 11:02:40 -0500 Eric Van Hensbergen <[EMAIL PROTECTED]> wrote: > + list_for_each_entry_reverse(tmp_page, page_list, lru) { > + BUG_ON(count > num_pages); > + if (add_to_page_cache(tmp_page, mapping, > + tmp_page->i