Re: [oom]: [1/4] add __GFP_WIRED to pinned allocations

[Andrew Morton]

William Lee Irwin III <wli@xxxxxxxxxxxxxx> wrote:
>
> Also, I should mention this concept is based on code seen in RHEL3,

What kernel is that?

> which uses a __GFP_WIRED flag, albeit for a different purpose (it
> appears to be centered around removing dirty ramfs pagecache from
> the LRU lists(s) as opposed to accounting for OOM-related reasons).

yes, putting ramfs, ramdisk and sysfs pages on the LRU is a bit silly.

However I think that taking a peek into mapping->backing_dev_info in
add_to_page_cache_lru(), __grab_cache_page() and wherever else would be a
tidier way of doing it.

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