hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5XQS4
CVE: NA

--------------------------------

If current->flag is set as PF_MEMALLOC, memcgroup will not check
current's allocation against memory use limit, which cause system run
out of memory.

According to
https://lkml.indiana.edu/hypermail/linux/kernel/0911.2/00576.html,
PF_MEMALLOC shall only be used when more memory are sure to be freed as a
result of this allocation.

Do not use PF_MEMALLOC, rather, remove __GFP_RECLAIM from gfp_mask to
ensure no reclaim.
Signed-off-by: NGuo Mengqi <guomengqi3@huawei.com>