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Message-ID: <202411091159.y6yDCkdf-lkp@intel.com>
Date: Sat, 9 Nov 2024 11:42:43 +0800
From: kernel test robot <lkp@...el.com>
To: Joshua Hahn <joshua.hahnjy@...il.com>, shakeel.butt@...ux.dev
Cc: oe-kbuild-all@...ts.linux.dev, hannes@...xchg.org, mhocko@...nel.org,
roman.gushchin@...ux.dev, muchun.song@...ux.dev,
akpm@...ux-foundation.org, cgroups@...r.kernel.org,
linux-mm@...ck.org, linux-kernel@...r.kernel.org,
kernel-team@...a.com
Subject: Re: [PATCH 2/3] memcg/hugetlb: Introduce mem_cgroup_charge_hugetlb
Hi Joshua,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on next-20241108]
[cannot apply to linus/master v6.12-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Joshua-Hahn/memcg-hugetlb-Introduce-memcg_accounts_hugetlb/20241109-053045
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20241108212946.2642085-3-joshua.hahnjy%40gmail.com
patch subject: [PATCH 2/3] memcg/hugetlb: Introduce mem_cgroup_charge_hugetlb
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20241109/202411091159.y6yDCkdf-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241109/202411091159.y6yDCkdf-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411091159.y6yDCkdf-lkp@intel.com/
All errors (new ones prefixed by >>):
mm/hugetlb.c: In function 'alloc_hugetlb_folio':
>> mm/hugetlb.c:3083:15: error: implicit declaration of function 'mem_cgroup_charge_hugetlb'; did you mean 'mem_cgroup_charge_skmem'? [-Werror=implicit-function-declaration]
3083 | ret = mem_cgroup_charge_hugetlb(folio, gfp);
| ^~~~~~~~~~~~~~~~~~~~~~~~~
| mem_cgroup_charge_skmem
cc1: some warnings being treated as errors
vim +3083 mm/hugetlb.c
2963
2964 struct folio *alloc_hugetlb_folio(struct vm_area_struct *vma,
2965 unsigned long addr, int avoid_reserve)
2966 {
2967 struct hugepage_subpool *spool = subpool_vma(vma);
2968 struct hstate *h = hstate_vma(vma);
2969 struct folio *folio;
2970 long map_chg, map_commit;
2971 long gbl_chg;
2972 int ret, idx;
2973 struct hugetlb_cgroup *h_cg = NULL;
2974 bool deferred_reserve;
2975 gfp_t gfp = htlb_alloc_mask(h) | __GFP_RETRY_MAYFAIL;
2976
2977 idx = hstate_index(h);
2978 /*
2979 * Examine the region/reserve map to determine if the process
2980 * has a reservation for the page to be allocated. A return
2981 * code of zero indicates a reservation exists (no change).
2982 */
2983 map_chg = gbl_chg = vma_needs_reservation(h, vma, addr);
2984 if (map_chg < 0)
2985 return ERR_PTR(-ENOMEM);
2986
2987 /*
2988 * Processes that did not create the mapping will have no
2989 * reserves as indicated by the region/reserve map. Check
2990 * that the allocation will not exceed the subpool limit.
2991 * Allocations for MAP_NORESERVE mappings also need to be
2992 * checked against any subpool limit.
2993 */
2994 if (map_chg || avoid_reserve) {
2995 gbl_chg = hugepage_subpool_get_pages(spool, 1);
2996 if (gbl_chg < 0)
2997 goto out_end_reservation;
2998
2999 /*
3000 * Even though there was no reservation in the region/reserve
3001 * map, there could be reservations associated with the
3002 * subpool that can be used. This would be indicated if the
3003 * return value of hugepage_subpool_get_pages() is zero.
3004 * However, if avoid_reserve is specified we still avoid even
3005 * the subpool reservations.
3006 */
3007 if (avoid_reserve)
3008 gbl_chg = 1;
3009 }
3010
3011 /* If this allocation is not consuming a reservation, charge it now.
3012 */
3013 deferred_reserve = map_chg || avoid_reserve;
3014 if (deferred_reserve) {
3015 ret = hugetlb_cgroup_charge_cgroup_rsvd(
3016 idx, pages_per_huge_page(h), &h_cg);
3017 if (ret)
3018 goto out_subpool_put;
3019 }
3020
3021 ret = hugetlb_cgroup_charge_cgroup(idx, pages_per_huge_page(h), &h_cg);
3022 if (ret)
3023 goto out_uncharge_cgroup_reservation;
3024
3025 spin_lock_irq(&hugetlb_lock);
3026 /*
3027 * glb_chg is passed to indicate whether or not a page must be taken
3028 * from the global free pool (global change). gbl_chg == 0 indicates
3029 * a reservation exists for the allocation.
3030 */
3031 folio = dequeue_hugetlb_folio_vma(h, vma, addr, avoid_reserve, gbl_chg);
3032 if (!folio) {
3033 spin_unlock_irq(&hugetlb_lock);
3034 folio = alloc_buddy_hugetlb_folio_with_mpol(h, vma, addr);
3035 if (!folio)
3036 goto out_uncharge_cgroup;
3037 spin_lock_irq(&hugetlb_lock);
3038 if (!avoid_reserve && vma_has_reserves(vma, gbl_chg)) {
3039 folio_set_hugetlb_restore_reserve(folio);
3040 h->resv_huge_pages--;
3041 }
3042 list_add(&folio->lru, &h->hugepage_activelist);
3043 folio_ref_unfreeze(folio, 1);
3044 /* Fall through */
3045 }
3046
3047 hugetlb_cgroup_commit_charge(idx, pages_per_huge_page(h), h_cg, folio);
3048 /* If allocation is not consuming a reservation, also store the
3049 * hugetlb_cgroup pointer on the page.
3050 */
3051 if (deferred_reserve) {
3052 hugetlb_cgroup_commit_charge_rsvd(idx, pages_per_huge_page(h),
3053 h_cg, folio);
3054 }
3055
3056 spin_unlock_irq(&hugetlb_lock);
3057
3058 hugetlb_set_folio_subpool(folio, spool);
3059
3060 map_commit = vma_commit_reservation(h, vma, addr);
3061 if (unlikely(map_chg > map_commit)) {
3062 /*
3063 * The page was added to the reservation map between
3064 * vma_needs_reservation and vma_commit_reservation.
3065 * This indicates a race with hugetlb_reserve_pages.
3066 * Adjust for the subpool count incremented above AND
3067 * in hugetlb_reserve_pages for the same page. Also,
3068 * the reservation count added in hugetlb_reserve_pages
3069 * no longer applies.
3070 */
3071 long rsv_adjust;
3072
3073 rsv_adjust = hugepage_subpool_put_pages(spool, 1);
3074 hugetlb_acct_memory(h, -rsv_adjust);
3075 if (deferred_reserve) {
3076 spin_lock_irq(&hugetlb_lock);
3077 hugetlb_cgroup_uncharge_folio_rsvd(hstate_index(h),
3078 pages_per_huge_page(h), folio);
3079 spin_unlock_irq(&hugetlb_lock);
3080 }
3081 }
3082
> 3083 ret = mem_cgroup_charge_hugetlb(folio, gfp);
3084 if (ret == -ENOMEM) {
3085 spin_unlock_irq(&hugetlb_lock);
3086 free_huge_folio(folio);
3087 return ERR_PTR(-ENOMEM);
3088 }
3089 else if (!ret)
3090 lruvec_stat_mod_folio(folio, NR_HUGETLB,
3091 pages_per_huge_page(h));
3092
3093 return folio;
3094
3095 out_uncharge_cgroup:
3096 hugetlb_cgroup_uncharge_cgroup(idx, pages_per_huge_page(h), h_cg);
3097 out_uncharge_cgroup_reservation:
3098 if (deferred_reserve)
3099 hugetlb_cgroup_uncharge_cgroup_rsvd(idx, pages_per_huge_page(h),
3100 h_cg);
3101 out_subpool_put:
3102 if (map_chg || avoid_reserve)
3103 hugepage_subpool_put_pages(spool, 1);
3104 out_end_reservation:
3105 vma_end_reservation(h, vma, addr);
3106 return ERR_PTR(-ENOSPC);
3107 }
3108
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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