diff options
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 0f246c44a574..85bed948fafc 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -912,9 +912,13 @@ found: error = 1; if (!inode) goto out; - error = radix_tree_preload(GFP_KERNEL); + /* Precharge page while we can wait, compensate afterwards */ + error = mem_cgroup_cache_charge(page, current->mm, GFP_KERNEL); if (error) goto out; + error = radix_tree_preload(GFP_KERNEL); + if (error) + goto uncharge; error = 1; spin_lock(&info->lock); @@ -947,6 +951,8 @@ found: shmem_swp_unmap(ptr); spin_unlock(&info->lock); radix_tree_preload_end(); +uncharge: + mem_cgroup_uncharge_page(page); out: unlock_page(page); page_cache_release(page); @@ -1308,6 +1314,13 @@ repeat: spin_unlock(&info->lock); unlock_page(swappage); page_cache_release(swappage); + if (error == -ENOMEM) { + /* allow reclaim from this memory cgroup */ + error = mem_cgroup_cache_charge(NULL, + current->mm, gfp & ~__GFP_HIGHMEM); + if (error) + goto failed; + } goto repeat; } } else if (sgp == SGP_READ && !filepage) { @@ -1353,6 +1366,17 @@ repeat: goto failed; } + /* Precharge page while we can wait, compensate after */ + error = mem_cgroup_cache_charge(filepage, current->mm, + gfp & ~__GFP_HIGHMEM); + if (error) { + page_cache_release(filepage); + shmem_unacct_blocks(info->flags, 1); + shmem_free_blocks(inode, 1); + filepage = NULL; + goto failed; + } + spin_lock(&info->lock); entry = shmem_swp_alloc(info, idx, sgp); if (IS_ERR(entry)) @@ -1364,6 +1388,7 @@ repeat: if (error || swap.val || 0 != add_to_page_cache_lru( filepage, mapping, idx, GFP_NOWAIT)) { spin_unlock(&info->lock); + mem_cgroup_uncharge_page(filepage); page_cache_release(filepage); shmem_unacct_blocks(info->flags, 1); shmem_free_blocks(inode, 1); @@ -1372,6 +1397,7 @@ repeat: goto failed; goto repeat; } + mem_cgroup_uncharge_page(filepage); info->flags |= SHMEM_PAGEIN; } |