Ho> Hi, I got the error __alloc_pages: 4-order allocation failed in a
Ho> module that uses and frees a lot of pages. Basically, I am trying
Ho> implement a page cache for the module. First, I keep allocating
Ho> pages using page_cache_alloc() until it fails, then I free a whole
Ho> bunch of pages using freepages((unsigned long)page_address(page))
Ho> Would anyone please give me some advice about how to solve this
Ho> problem? Thanks a lot.
You ran out of memory, ie. there were no more free blocks of 16
consecutive pages available in the system. This is what happens on a
system with little memory or which is loaded with memory intensive
applications.
Jes
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