diff options
| -rw-r--r-- | fs/fs-writeback.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index e41cbe8e81b9..9ebfb1b28430 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -715,6 +715,7 @@ void wbc_detach_inode(struct writeback_control *wbc) void wbc_account_io(struct writeback_control *wbc, struct page *page, size_t bytes) { + struct cgroup_subsys_state *css; int id; /* @@ -726,7 +727,12 @@ void wbc_account_io(struct writeback_control *wbc, struct page *page, if (!wbc->wb) return; - id = mem_cgroup_css_from_page(page)->id; + css = mem_cgroup_css_from_page(page); + /* dead cgroups shouldn't contribute to inode ownership arbitration */ + if (!(css->flags & CSS_ONLINE)) + return; + + id = css->id; if (id == wbc->wb_id) { wbc->wb_bytes += bytes; |