Messages in this thread | | | Date | Thu, 07 Mar 2002 19:04:38 -0800 | From | Dave Hansen <> | Subject | Re: truncate_list_pages() BUG and confusion |
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Martin J. Bligh wrote: > Where did truncate_list_pages unlock it? It doesn't do that > until after it's called truncate_complete_page, which (indirectly) > frees the page ... ?
Ahh, put_page_testzero #define put_page_testzero(p) atomic_dec_and_test(&(p)->count)
It will only try to free if the page count is zero. The caller makes sure that this doesn't happen.
if (!PageReserved(page) && put_page_testzero(page)) { if (PageLRU(page)) lru_cache_del(page); __free_pages_ok(page, 0); }
-- Dave Hansen haveblue@us.ibm.com
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