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    SubjectRe: [PATCH 2/5] page allocator: Do not allow interrupts to use ALLOC_HARDER
    Date
    > Commit 341ce06f69abfafa31b9468410a13dbd60e2b237 altered watermark logic
    > slightly by allowing rt_tasks that are handling an interrupt to set
    > ALLOC_HARDER. This patch brings the watermark logic more in line with
    > 2.6.30.

    ditto.
    afaik, this patch have been sent to linus.


    >
    > [rientjes@google.com: Spotted the problem]
    > Signed-off-by: Mel Gorman <mel@csn.ul.ie>
    > Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
    > Reviewed-by: Rik van Riel <riel@redhat.com>
    > Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    > ---
    > mm/page_alloc.c | 2 +-
    > 1 files changed, 1 insertions(+), 1 deletions(-)
    >
    > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    > index 250d055..2bc2ac6 100644
    > --- a/mm/page_alloc.c
    > +++ b/mm/page_alloc.c
    > @@ -1769,7 +1769,7 @@ gfp_to_alloc_flags(gfp_t gfp_mask)
    > * See also cpuset_zone_allowed() comment in kernel/cpuset.c.
    > */
    > alloc_flags &= ~ALLOC_CPUSET;
    > - } else if (unlikely(rt_task(p)))
    > + } else if (unlikely(rt_task(p)) && !in_interrupt())
    > alloc_flags |= ALLOC_HARDER;
    >
    > if (likely(!(gfp_mask & __GFP_NOMEMALLOC))) {
    > --
    > 1.6.5
    >





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