On Fri, Nov 18, 2022 at 06:00:11PM +0800, Qi Zheng wrote:
When we specify __GFP_NOWARN, we only expect that no warnings will be issued for current caller. But in the __should_failslab() and __should_fail_alloc_page(), the local GFP flags alter the global {failslab|fail_page_alloc}.attr, which is persistent and shared by all tasks. This is not what we expected, let's fix it.
Cc: stable@vger.kernel.org Fixes: 3f913fc5f974 ("mm: fix missing handler for __GFP_NOWARN") Reported-by: Dmitry Vyukov dvyukov@google.com Signed-off-by: Qi Zheng zhengqi.arch@bytedance.com Reviewed-by: Akinobu Mita akinobu.mita@gmail.com
v1: https://lore.kernel.org/lkml/20221107033109.59709-1-zhengqi.arch@bytedance.c... v2: https://lore.kernel.org/lkml/20221108035232.87180-1-zhengqi.arch@bytedance.c...
Reviewed-by: Jason Gunthorpe jgg@nvidia.com
Jason