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| author |   Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-04-15 16:14:20 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:18 -0700 |
| commit | 65ebb64f4d2ce8eba4d0ec82d6cf65022e70e4a1 (patch) | |
| tree | 52086d74382f1645a649794585c8f3f2581c6313 /mm | |
| parent | mm, mempool: poison elements backed by slab allocator (diff) | |
| download | linux-dev-65ebb64f4d2ce8eba4d0ec82d6cf65022e70e4a1.tar.xz linux-dev-65ebb64f4d2ce8eba4d0ec82d6cf65022e70e4a1.zip | |
thp: handle errors in hugepage_init() properly
We miss error-handling in few cases hugepage_init(). Let's fix that.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/huge_memory.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 1db93fbda06a..c257006749bb 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -67,6 +67,7 @@ static unsigned int khugepaged_max_ptes_none __read_mostly = HPAGE_PMD_NR-1; static int khugepaged(void *none); static int khugepaged_slab_init(void); +static void khugepaged_slab_exit(void); #define MM_SLOTS_HASH_BITS 10 static __read_mostly DEFINE_HASHTABLE(mm_slots_hash, MM_SLOTS_HASH_BITS); @@ -634,13 +635,15 @@ static int __init hugepage_init(void) err = hugepage_init_sysfs(&hugepage_kobj); if (err) - return err; + goto err_sysfs; err = khugepaged_slab_init(); if (err) - goto out; + goto err_slab; - register_shrinker(&huge_zero_page_shrinker); + err = register_shrinker(&huge_zero_page_shrinker); + if (err) + goto err_hzp_shrinker; /* * By default disable transparent hugepages on smaller systems, @@ -650,11 +653,18 @@ static int __init hugepage_init(void) if (totalram_pages < (512 << (20 - PAGE_SHIFT))) transparent_hugepage_flags = 0; - start_khugepaged(); + err = start_khugepaged(); + if (err) + goto err_khugepaged; return 0; -out: +err_khugepaged: + unregister_shrinker(&huge_zero_page_shrinker); +err_hzp_shrinker: + khugepaged_slab_exit(); +err_slab: hugepage_exit_sysfs(hugepage_kobj); +err_sysfs: return err; } subsys_initcall(hugepage_init); @@ -1974,6 +1984,11 @@ static int __init khugepaged_slab_init(void) return 0; } +static void __init khugepaged_slab_exit(void) +{ + kmem_cache_destroy(mm_slot_cache); +} + static inline struct mm_slot *alloc_mm_slot(void) { if (!mm_slot_cache) /* initialization failed */ |