Merge branch 'akpm' (patches from Andrew)

Merge misc fixes from Andrew Morton:
 "20 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  drivers/misc/sgi-gru/grumain.c: remove bogus 0x prefix from printk
  cris/arch-v32: cryptocop: print a hex number after a 0x prefix
  ipack: print a hex number after a 0x prefix
  block: DAC960: print a hex number after a 0x prefix
  fs: exofs: print a hex number after a 0x prefix
  lib/genalloc.c: start search from start of chunk
  mm: memcontrol: do not recurse in direct reclaim
  CREDITS: update credit information for Martin Kepplinger
  proc: fix NULL dereference when reading /proc/<pid>/auxv
  mm: kmemleak: ensure that the task stack is not freed during scanning
  lib/stackdepot.c: bump stackdepot capacity from 16MB to 128MB
  latent_entropy: raise CONFIG_FRAME_WARN by default
  kconfig.h: remove config_enabled() macro
  ipc: account for kmem usage on mqueue and msg
  mm/slab: improve performance of gathering slabinfo stats
  mm: page_alloc: use KERN_CONT where appropriate
  mm/list_lru.c: avoid error-path NULL pointer deref
  h8300: fix syscall restarting
  kcov: properly check if we are in an interrupt
  mm/slab: fix kmemcg cache creation delayed issue

diff --git a/CREDITS b/CREDITS
index 513aaa3..8373676 100644 (file)
--- a/CREDITS
+++ b/CREDITS
@@ -1864,10 +1864,11 @@ S: The Netherlands
 
 N: Martin Kepplinger
 E: martink@posteo.de
-E: martin.kepplinger@theobroma-systems.com
+E: martin.kepplinger@ginzinger.com
 W: http://www.martinkepplinger.com
 D: mma8452 accelerators iio driver
-D: Kernel cleanups
+D: pegasus_notetaker input driver
+D: Kernel fixes and cleanups
 S: Garnisonstraße 26
 S: 4020 Linz
 S: Austria

diff --git a/arch/cris/arch-v32/drivers/cryptocop.c b/arch/cris/arch-v32/drivers/cryptocop.c
index 099e170..0068fd4 100644 (file)
--- a/arch/cris/arch-v32/drivers/cryptocop.c
+++ b/arch/cris/arch-v32/drivers/cryptocop.c
@@ -3149,7 +3149,7 @@ static void print_dma_descriptors(struct cryptocop_int_operation *iop)
        printk("print_dma_descriptors start\n");
 
        printk("iop:\n");
-       printk("\tsid: 0x%lld\n", iop->sid);
+       printk("\tsid: 0x%llx\n", iop->sid);
 
        printk("\tcdesc_out: 0x%p\n", iop->cdesc_out);
        printk("\tcdesc_in: 0x%p\n", iop->cdesc_in);

diff --git a/arch/h8300/include/asm/thread_info.h b/arch/h8300/include/asm/thread_info.h
index b408fe6..3cef068 100644 (file)
--- a/arch/h8300/include/asm/thread_info.h
+++ b/arch/h8300/include/asm/thread_info.h
@@ -31,7 +31,6 @@ struct thread_info {
        int                cpu;                 /* cpu we're on */
        int                preempt_count;       /* 0 => preemptable, <0 => BUG */
        mm_segment_t            addr_limit;
-       struct restart_block restart_block;
 };
 
 /*
@@ -44,9 +43,6 @@ struct thread_info {
        .cpu =          0,                      \
        .preempt_count = INIT_PREEMPT_COUNT,    \
        .addr_limit     = KERNEL_DS,            \
-       .restart_block  = {                     \
-               .fn = do_no_restart_syscall,    \
-       },                                      \
 }
 
 #define init_thread_info       (init_thread_union.thread_info)

diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index ad1f81f..7138303 100644 (file)
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -79,7 +79,7 @@ restore_sigcontext(struct sigcontext *usc, int *pd0)
        unsigned int er0;
 
        /* Always make any pending restarted system calls return -EINTR */
-       current_thread_info()->restart_block.fn = do_no_restart_syscall;
+       current->restart_block.fn = do_no_restart_syscall;
 
        /* restore passed registers */
 #define COPY(r)  do { err |= get_user(regs->r, &usc->sc_##r); } while (0)

diff --git a/arch/x86/mm/kaslr.c b/arch/x86/mm/kaslr.c
index ddd2661..887e571 100644 (file)
--- a/arch/x86/mm/kaslr.c
+++ b/arch/x86/mm/kaslr.c
@@ -104,10 +104,10 @@ void __init kernel_randomize_memory(void)
         * consistent with the vaddr_start/vaddr_end variables.
         */
        BUILD_BUG_ON(vaddr_start >= vaddr_end);
-       BUILD_BUG_ON(config_enabled(CONFIG_X86_ESPFIX64) &&
+       BUILD_BUG_ON(IS_ENABLED(CONFIG_X86_ESPFIX64) &&
                     vaddr_end >= EFI_VA_START);
-       BUILD_BUG_ON((config_enabled(CONFIG_X86_ESPFIX64) ||
-                     config_enabled(CONFIG_EFI)) &&
+       BUILD_BUG_ON((IS_ENABLED(CONFIG_X86_ESPFIX64) ||
+                     IS_ENABLED(CONFIG_EFI)) &&
                     vaddr_end >= __START_KERNEL_map);
        BUILD_BUG_ON(vaddr_end > __START_KERNEL_map);
 

diff --git a/drivers/block/DAC960.c b/drivers/block/DAC960.c
index 811e11c..0809cda 100644 (file)
--- a/drivers/block/DAC960.c
+++ b/drivers/block/DAC960.c
@@ -2954,7 +2954,7 @@ DAC960_DetectController(struct pci_dev *PCI_Device,
        case DAC960_PD_Controller:
          if (!request_region(Controller->IO_Address, 0x80,
                              Controller->FullModelName)) {
-               DAC960_Error("IO port 0x%d busy for Controller at\n",
+               DAC960_Error("IO port 0x%lx busy for Controller at\n",
                             Controller, Controller->IO_Address);
                goto Failure;
          }
@@ -2990,7 +2990,7 @@ DAC960_DetectController(struct pci_dev *PCI_Device,
        case DAC960_P_Controller:
          if (!request_region(Controller->IO_Address, 0x80,
                              Controller->FullModelName)){
-               DAC960_Error("IO port 0x%d busy for Controller at\n",
+               DAC960_Error("IO port 0x%lx busy for Controller at\n",
                             Controller, Controller->IO_Address);
                goto Failure;
          }

diff --git a/drivers/ipack/ipack.c b/drivers/ipack/ipack.c
index c0e7b62..1210244 100644 (file)
--- a/drivers/ipack/ipack.c
+++ b/drivers/ipack/ipack.c
@@ -178,7 +178,7 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
                       idev->id_vendor, idev->id_device);
 }
 
-ipack_device_attr(id_format, "0x%hhu\n");
+ipack_device_attr(id_format, "0x%hhx\n");
 
 static DEVICE_ATTR_RO(id);
 static DEVICE_ATTR_RO(id_device);

diff --git a/drivers/misc/sgi-gru/grumain.c b/drivers/misc/sgi-gru/grumain.c
index 1525870..33741ad 100644 (file)
--- a/drivers/misc/sgi-gru/grumain.c
+++ b/drivers/misc/sgi-gru/grumain.c
@@ -283,7 +283,7 @@ static void gru_unload_mm_tracker(struct gru_state *gru,
        spin_lock(&gru->gs_asid_lock);
        BUG_ON((asids->mt_ctxbitmap & ctxbitmap) != ctxbitmap);
        asids->mt_ctxbitmap ^= ctxbitmap;
-       gru_dbg(grudev, "gid %d, gts %p, gms %p, ctxnum 0x%d, asidmap 0x%lx\n",
+       gru_dbg(grudev, "gid %d, gts %p, gms %p, ctxnum %d, asidmap 0x%lx\n",
                gru->gs_gid, gts, gms, gts->ts_ctxnum, gms->ms_asidmap[0]);
        spin_unlock(&gru->gs_asid_lock);
        spin_unlock(&gms->ms_asid_lock);

diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
index 7910165..42f9a0a 100644 (file)
--- a/fs/exofs/dir.c
+++ b/fs/exofs/dir.c
@@ -137,7 +137,7 @@ Espan:
 bad_entry:
        EXOFS_ERR(
                "ERROR [exofs_check_page]: bad entry in directory(0x%lx): %s - "
-               "offset=%lu, inode=0x%llu, rec_len=%d, name_len=%d\n",
+               "offset=%lu, inode=0x%llx, rec_len=%d, name_len=%d\n",
                dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs,
                _LLU(le64_to_cpu(p->inode_no)),
                rec_len, p->name_len);

diff --git a/fs/proc/base.c b/fs/proc/base.c
index adfc5b4..ca651ac 100644 (file)
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -1012,6 +1012,9 @@ static ssize_t auxv_read(struct file *file, char __user *buf,
 {
        struct mm_struct *mm = file->private_data;
        unsigned int nwords = 0;
+
+       if (!mm)
+               return 0;
        do {
                nwords += 2;
        } while (mm->saved_auxv[nwords - 2] != 0); /* AT_NULL */

diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index 43199a0..63554e9 100644 (file)
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -70,7 +70,7 @@ KSYM(__kcrctab_\name):
 #include <generated/autoksyms.h>
 
 #define __EXPORT_SYMBOL(sym, val, sec)                         \
-       __cond_export_sym(sym, val, sec, config_enabled(__KSYM_##sym))
+       __cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
 #define __cond_export_sym(sym, val, sec, conf)                 \
        ___cond_export_sym(sym, val, sec, conf)
 #define ___cond_export_sym(sym, val, sec, enabled)             \

diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h
index 15ec117..8f2e059 100644 (file)
--- a/include/linux/kconfig.h
+++ b/include/linux/kconfig.h
@@ -31,7 +31,6 @@
  * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
  * the last step cherry picks the 2nd arg, we get a zero.
  */
-#define config_enabled(cfg)            ___is_defined(cfg)
 #define __is_defined(x)                        ___is_defined(x)
 #define ___is_defined(val)             ____is_defined(__ARG_PLACEHOLDER_##val)
 #define ____is_defined(arg1_or_junk)   __take_second_arg(arg1_or_junk 1, 0)
@@ -41,13 +40,13 @@
  * otherwise. For boolean options, this is equivalent to
  * IS_ENABLED(CONFIG_FOO).
  */
-#define IS_BUILTIN(option) config_enabled(option)
+#define IS_BUILTIN(option) __is_defined(option)
 
 /*
  * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
  * otherwise.
  */
-#define IS_MODULE(option) config_enabled(option##_MODULE)
+#define IS_MODULE(option) __is_defined(option##_MODULE)
 
 /*
  * IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled

diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index a521999..bf74eaa 100644 (file)
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -53,7 +53,7 @@ static struct msg_msg *alloc_msg(size_t len)
        size_t alen;
 
        alen = min(len, DATALEN_MSG);
-       msg = kmalloc(sizeof(*msg) + alen, GFP_KERNEL);
+       msg = kmalloc(sizeof(*msg) + alen, GFP_KERNEL_ACCOUNT);
        if (msg == NULL)
                return NULL;
 
@@ -65,7 +65,7 @@ static struct msg_msg *alloc_msg(size_t len)
        while (len > 0) {
                struct msg_msgseg *seg;
                alen = min(len, DATALEN_SEG);
-               seg = kmalloc(sizeof(*seg) + alen, GFP_KERNEL);
+               seg = kmalloc(sizeof(*seg) + alen, GFP_KERNEL_ACCOUNT);
                if (seg == NULL)
                        goto out_err;
                *pseg = seg;

diff --git a/kernel/kcov.c b/kernel/kcov.c
index 8d44b3f..30e6d05 100644 (file)
--- a/kernel/kcov.c
+++ b/kernel/kcov.c
@@ -53,8 +53,15 @@ void notrace __sanitizer_cov_trace_pc(void)
        /*
         * We are interested in code coverage as a function of a syscall inputs,
         * so we ignore code executed in interrupts.
+        * The checks for whether we are in an interrupt are open-coded, because
+        * 1. We can't use in_interrupt() here, since it also returns true
+        *    when we are inside local_bh_disable() section.
+        * 2. We don't want to use (in_irq() | in_serving_softirq() | in_nmi()),
+        *    since that leads to slower generated code (three separate tests,
+        *    one for each of the flags).
         */
-       if (!t || in_interrupt())
+       if (!t || (preempt_count() & (HARDIRQ_MASK | SOFTIRQ_OFFSET
+                                                       | NMI_MASK)))
                return;
        mode = READ_ONCE(t->kcov_mode);
        if (mode == KCOV_MODE_TRACE) {

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 33bc56c..b01e547 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -198,6 +198,7 @@ config FRAME_WARN
        int "Warn for stack frames larger than (needs gcc 4.4)"
        range 0 8192
        default 0 if KASAN
+       default 2048 if GCC_PLUGIN_LATENT_ENTROPY
        default 1024 if !64BIT
        default 2048 if 64BIT
        help

diff --git a/lib/genalloc.c b/lib/genalloc.c
index 0a11396..144fe6b 100644 (file)
--- a/lib/genalloc.c
+++ b/lib/genalloc.c
@@ -292,7 +292,7 @@ unsigned long gen_pool_alloc_algo(struct gen_pool *pool, size_t size,
        struct gen_pool_chunk *chunk;
        unsigned long addr = 0;
        int order = pool->min_alloc_order;
-       int nbits, start_bit = 0, end_bit, remain;
+       int nbits, start_bit, end_bit, remain;
 
 #ifndef CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG
        BUG_ON(in_nmi());
@@ -307,6 +307,7 @@ unsigned long gen_pool_alloc_algo(struct gen_pool *pool, size_t size,
                if (size > atomic_read(&chunk->avail))
                        continue;
 
+               start_bit = 0;
                end_bit = chunk_size(chunk) >> order;
 retry:
                start_bit = algo(chunk->bits, end_bit, start_bit,

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 60f77f1..4d830e2 100644 (file)
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -50,7 +50,7 @@
                                        STACK_ALLOC_ALIGN)
 #define STACK_ALLOC_INDEX_BITS (DEPOT_STACK_BITS - \
                STACK_ALLOC_NULL_PROTECTION_BITS - STACK_ALLOC_OFFSET_BITS)
-#define STACK_ALLOC_SLABS_CAP 1024
+#define STACK_ALLOC_SLABS_CAP 8192
 #define STACK_ALLOC_MAX_SLABS \
        (((1LL << (STACK_ALLOC_INDEX_BITS)) < STACK_ALLOC_SLABS_CAP) ? \
         (1LL << (STACK_ALLOC_INDEX_BITS)) : STACK_ALLOC_SLABS_CAP)

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index a5e453c..e5355a5 100644 (file)
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -1453,8 +1453,11 @@ static void kmemleak_scan(void)
 
                read_lock(&tasklist_lock);
                do_each_thread(g, p) {
-                       scan_block(task_stack_page(p), task_stack_page(p) +
-                                  THREAD_SIZE, NULL);
+                       void *stack = try_get_task_stack(p);
+                       if (stack) {
+                               scan_block(stack, stack + THREAD_SIZE, NULL);
+                               put_task_stack(p);
+                       }
                } while_each_thread(g, p);
                read_unlock(&tasklist_lock);
        }

diff --git a/mm/list_lru.c b/mm/list_lru.c
index 1d05cb9..234676e 100644 (file)
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -554,6 +554,8 @@ int __list_lru_init(struct list_lru *lru, bool memcg_aware,
        err = memcg_init_list_lru(lru, memcg_aware);
        if (err) {
                kfree(lru->node);
+               /* Do this so a list_lru_destroy() doesn't crash: */
+               lru->node = NULL;
                goto out;
        }
 

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ae052b5..0f870ba 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1917,6 +1917,15 @@ retry:
                     current->flags & PF_EXITING))
                goto force;
 
+       /*
+        * Prevent unbounded recursion when reclaim operations need to
+        * allocate memory. This might exceed the limits temporarily,
+        * but we prefer facilitating memory reclaim and getting back
+        * under the limit over triggering OOM kills in these cases.
+        */
+       if (unlikely(current->flags & PF_MEMALLOC))
+               goto force;
+
        if (unlikely(task_in_memcg_oom(current)))
                goto nomem;
 

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index de7c6e4..8fd42aa 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4224,7 +4224,7 @@ static void show_migration_types(unsigned char type)
        }
 
        *p = '\0';
-       printk("(%s) ", tmp);
+       printk(KERN_CONT "(%s) ", tmp);
 }
 
 /*
@@ -4335,7 +4335,8 @@ void show_free_areas(unsigned int filter)
                        free_pcp += per_cpu_ptr(zone->pageset, cpu)->pcp.count;
 
                show_node(zone);
-               printk("%s"
+               printk(KERN_CONT
+                       "%s"
                        " free:%lukB"
                        " min:%lukB"
                        " low:%lukB"
@@ -4382,8 +4383,8 @@ void show_free_areas(unsigned int filter)
                        K(zone_page_state(zone, NR_FREE_CMA_PAGES)));
                printk("lowmem_reserve[]:");
                for (i = 0; i < MAX_NR_ZONES; i++)
-                       printk(" %ld", zone->lowmem_reserve[i]);
-               printk("\n");
+                       printk(KERN_CONT " %ld", zone->lowmem_reserve[i]);
+               printk(KERN_CONT "\n");
        }
 
        for_each_populated_zone(zone) {
@@ -4394,7 +4395,7 @@ void show_free_areas(unsigned int filter)
                if (skip_free_areas_node(filter, zone_to_nid(zone)))
                        continue;
                show_node(zone);
-               printk("%s: ", zone->name);
+               printk(KERN_CONT "%s: ", zone->name);
 
                spin_lock_irqsave(&zone->lock, flags);
                for (order = 0; order < MAX_ORDER; order++) {
@@ -4412,11 +4413,12 @@ void show_free_areas(unsigned int filter)
                }
                spin_unlock_irqrestore(&zone->lock, flags);
                for (order = 0; order < MAX_ORDER; order++) {
-                       printk("%lu*%lukB ", nr[order], K(1UL) << order);
+                       printk(KERN_CONT "%lu*%lukB ",
+                              nr[order], K(1UL) << order);
                        if (nr[order])
                                show_migration_types(types[order]);
                }
-               printk("= %lukB\n", K(total));
+               printk(KERN_CONT "= %lukB\n", K(total));
        }
 
        hugetlb_show_meminfo();

diff --git a/mm/slab.c b/mm/slab.c
index 090fb26..0b0550c 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -233,6 +233,7 @@ static void kmem_cache_node_init(struct kmem_cache_node *parent)
        spin_lock_init(&parent->list_lock);
        parent->free_objects = 0;
        parent->free_touched = 0;
+       parent->num_slabs = 0;
 }
 
 #define MAKE_LIST(cachep, listp, slab, nodeid)                         \
@@ -966,7 +967,7 @@ static int setup_kmem_cache_node(struct kmem_cache *cachep,
         * guaranteed to be valid until irq is re-enabled, because it will be
         * freed after synchronize_sched().
         */
-       if (force_change)
+       if (old_shared && force_change)
                synchronize_sched();
 
 fail:
@@ -1382,24 +1383,27 @@ slab_out_of_memory(struct kmem_cache *cachep, gfp_t gfpflags, int nodeid)
        for_each_kmem_cache_node(cachep, node, n) {
                unsigned long active_objs = 0, num_objs = 0, free_objects = 0;
                unsigned long active_slabs = 0, num_slabs = 0;
+               unsigned long num_slabs_partial = 0, num_slabs_free = 0;
+               unsigned long num_slabs_full;
 
                spin_lock_irqsave(&n->list_lock, flags);
-               list_for_each_entry(page, &n->slabs_full, lru) {
-                       active_objs += cachep->num;
-                       active_slabs++;
-               }
+               num_slabs = n->num_slabs;
                list_for_each_entry(page, &n->slabs_partial, lru) {
                        active_objs += page->active;
-                       active_slabs++;
+                       num_slabs_partial++;
                }
                list_for_each_entry(page, &n->slabs_free, lru)
-                       num_slabs++;
+                       num_slabs_free++;
 
                free_objects += n->free_objects;
                spin_unlock_irqrestore(&n->list_lock, flags);
 
-               num_slabs += active_slabs;
                num_objs = num_slabs * cachep->num;
+               active_slabs = num_slabs - num_slabs_free;
+               num_slabs_full = num_slabs -
+                       (num_slabs_partial + num_slabs_free);
+               active_objs += (num_slabs_full * cachep->num);
+
                pr_warn("  node %d: slabs: %ld/%ld, objs: %ld/%ld, free: %ld\n",
                        node, active_slabs, num_slabs, active_objs, num_objs,
                        free_objects);
@@ -2314,6 +2318,7 @@ static int drain_freelist(struct kmem_cache *cache,
 
                page = list_entry(p, struct page, lru);
                list_del(&page->lru);
+               n->num_slabs--;
                /*
                 * Safe to drop the lock. The slab is no longer linked
                 * to the cache.
@@ -2752,6 +2757,8 @@ static void cache_grow_end(struct kmem_cache *cachep, struct page *page)
                list_add_tail(&page->lru, &(n->slabs_free));
        else
                fixup_slab_list(cachep, n, page, &list);
+
+       n->num_slabs++;
        STATS_INC_GROWN(cachep);
        n->free_objects += cachep->num - page->active;
        spin_unlock(&n->list_lock);
@@ -3443,6 +3450,7 @@ static void free_block(struct kmem_cache *cachep, void **objpp,
 
                page = list_last_entry(&n->slabs_free, struct page, lru);
                list_move(&page->lru, list);
+               n->num_slabs--;
        }
 }
 
@@ -4099,6 +4107,8 @@ void get_slabinfo(struct kmem_cache *cachep, struct slabinfo *sinfo)
        unsigned long num_objs;
        unsigned long active_slabs = 0;
        unsigned long num_slabs, free_objects = 0, shared_avail = 0;
+       unsigned long num_slabs_partial = 0, num_slabs_free = 0;
+       unsigned long num_slabs_full = 0;
        const char *name;
        char *error = NULL;
        int node;
@@ -4111,33 +4121,34 @@ void get_slabinfo(struct kmem_cache *cachep, struct slabinfo *sinfo)
                check_irq_on();
                spin_lock_irq(&n->list_lock);
 
-               list_for_each_entry(page, &n->slabs_full, lru) {
-                       if (page->active != cachep->num && !error)
-                               error = "slabs_full accounting error";
-                       active_objs += cachep->num;
-                       active_slabs++;
-               }
+               num_slabs += n->num_slabs;
+
                list_for_each_entry(page, &n->slabs_partial, lru) {
                        if (page->active == cachep->num && !error)
                                error = "slabs_partial accounting error";
                        if (!page->active && !error)
                                error = "slabs_partial accounting error";
                        active_objs += page->active;
-                       active_slabs++;
+                       num_slabs_partial++;
                }
+
                list_for_each_entry(page, &n->slabs_free, lru) {
                        if (page->active && !error)
                                error = "slabs_free accounting error";
-                       num_slabs++;
+                       num_slabs_free++;
                }
+
                free_objects += n->free_objects;
                if (n->shared)
                        shared_avail += n->shared->avail;
 
                spin_unlock_irq(&n->list_lock);
        }
-       num_slabs += active_slabs;
        num_objs = num_slabs * cachep->num;
+       active_slabs = num_slabs - num_slabs_free;
+       num_slabs_full = num_slabs - (num_slabs_partial + num_slabs_free);
+       active_objs += (num_slabs_full * cachep->num);
+
        if (num_objs - active_objs != free_objects && !error)
                error = "free_objects accounting error";
 

diff --git a/mm/slab.h b/mm/slab.h
index 9653f2e..bc05fdc 100644 (file)
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -432,6 +432,7 @@ struct kmem_cache_node {
        struct list_head slabs_partial; /* partial list first, better asm code */
        struct list_head slabs_full;
        struct list_head slabs_free;
+       unsigned long num_slabs;
        unsigned long free_objects;
        unsigned int free_limit;
        unsigned int colour_next;       /* Per-node cache coloring */

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 744f926..76fda22 100644 (file)
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3043,7 +3043,9 @@ unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
                                            sc.gfp_mask,
                                            sc.reclaim_idx);
 
+       current->flags |= PF_MEMALLOC;
        nr_reclaimed = do_try_to_free_pages(zonelist, &sc);
+       current->flags &= ~PF_MEMALLOC;
 
        trace_mm_vmscan_memcg_reclaim_end(nr_reclaimed);