AcoSail/kernel_optimize_test
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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

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* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] s390: Fix build for !CONFIG_S390_GUEST + CONFIG_VIRTIO_CONSOLE
  [S390] No more 4kb stacks.
  [S390] Change default IPL method to IPL_VM.
  [S390] tape: disable interrupts in tape_open and tape_release
  [S390] appldata: unsigned ops->size cannot be negative
  [S390] tape block: complete request with correct locking
  [S390] Fix sysdev class file creation.
  [S390] pgtables: Fix race in enable_sie vs. page table ops
  [S390] qdio: remove incorrect memset
  [S390] qdio: prevent double qdio shutdown in case of I/O errors
This commit is contained in:
Linus Torvalds 2008-10-28 09:44:59 -07:00
commit b30fc14c5c
13 changed files with 62 additions and 67 deletions
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16
arch/s390/Kconfig
View File

@ -241,19 +241,17 @@ config PACK_STACK
Say Y if you are unsure.
config SMALL_STACK
bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb"
depends on PACK_STACK && !LOCKDEP
bool "Use 8kb for kernel stack instead of 16kb"
depends on PACK_STACK && 64BIT && !LOCKDEP
help
If you say Y here and the compiler supports the -mkernel-backchain
option the kernel will use a smaller kernel stack size. For 31 bit
the reduced size is 4kb instead of 8kb and for 64 bit it is 8kb
instead of 16kb. This allows to run more thread on a system and
reduces the pressure on the memory management for higher order
page allocations.
option the kernel will use a smaller kernel stack size. The reduced
size is 8kb instead of 16kb. This allows to run more threads on a
system and reduces the pressure on the memory management for higher
order page allocations.
Say N if you are unsure.
config CHECK_STACK
bool "Detect kernel stack overflow"
help
@ -384,7 +382,7 @@ config IPL
choice
prompt "IPL method generated into head.S"
depends on IPL
default IPL_TAPE
default IPL_VM
help
Select "tape" if you want to IPL the image from a Tape.

2
arch/s390/appldata/appldata_base.c
View File

@ -424,7 +424,7 @@ appldata_generic_handler(ctl_table *ctl, int write, struct file *filp,
*/
int appldata_register_ops(struct appldata_ops *ops)
{
if ((ops->size > APPLDATA_MAX_REC_SIZE) || (ops->size < 0))
if (ops->size > APPLDATA_MAX_REC_SIZE)
return -EINVAL;
ops->ctl_table = kzalloc(4 * sizeof(struct ctl_table), GFP_KERNEL);

2
arch/s390/include/asm/kvm_virtio.h
View File

@ -52,7 +52,7 @@ struct kvm_vqconfig {
#ifdef __KERNEL__
/* early virtio console setup */
#ifdef CONFIG_VIRTIO_CONSOLE
#ifdef CONFIG_S390_GUEST
extern void s390_virtio_console_init(void);
#else
static inline void s390_virtio_console_init(void)

3
arch/s390/include/asm/mmu.h
View File

@ -7,7 +7,8 @@ typedef struct {
unsigned long asce_bits;
unsigned long asce_limit;
int noexec;
int pgstes;
int has_pgste; /* The mmu context has extended page tables */
int alloc_pgste; /* cloned contexts will have extended page tables */
} mm_context_t;
#endif

19
arch/s390/include/asm/mmu_context.h
View File

@ -20,12 +20,25 @@ static inline int init_new_context(struct task_struct *tsk,
#ifdef CONFIG_64BIT
mm->context.asce_bits |= _ASCE_TYPE_REGION3;
#endif
if (current->mm->context.pgstes) {
if (current->mm->context.alloc_pgste) {
/*
* alloc_pgste indicates, that any NEW context will be created
* with extended page tables. The old context is unchanged. The
* page table allocation and the page table operations will
* look at has_pgste to distinguish normal and extended page
* tables. The only way to create extended page tables is to
* set alloc_pgste and then create a new context (e.g. dup_mm).
* The page table allocation is called after init_new_context
* and if has_pgste is set, it will create extended page
* tables.
*/
mm->context.noexec = 0;
mm->context.pgstes = 1;
mm->context.has_pgste = 1;
mm->context.alloc_pgste = 1;
} else {
mm->context.noexec = s390_noexec;
mm->context.pgstes = 0;
mm->context.has_pgste = 0;
mm->context.alloc_pgste = 0;
}
mm->context.asce_limit = STACK_TOP_MAX;
crst_table_init((unsigned long *) mm->pgd, pgd_entry_type(mm));

8
arch/s390/include/asm/pgtable.h
View File

@ -679,7 +679,7 @@ static inline void pmd_clear(pmd_t *pmd)
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
if (mm->context.pgstes)
if (mm->context.has_pgste)
ptep_rcp_copy(ptep);
pte_val(*ptep) = _PAGE_TYPE_EMPTY;
if (mm->context.noexec)
@ -763,7 +763,7 @@ static inline int kvm_s390_test_and_clear_page_dirty(struct mm_struct *mm,
struct page *page;
unsigned int skey;
if (!mm->context.pgstes)
if (!mm->context.has_pgste)
return -EINVAL;
rcp_lock(ptep);
pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
@ -794,7 +794,7 @@ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
int young;
unsigned long *pgste;
if (!vma->vm_mm->context.pgstes)
if (!vma->vm_mm->context.has_pgste)
return 0;
physpage = pte_val(*ptep) & PAGE_MASK;
pgste = (unsigned long *) (ptep + PTRS_PER_PTE);
@ -844,7 +844,7 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
static inline void ptep_invalidate(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
{
if (mm->context.pgstes) {
if (mm->context.has_pgste) {
rcp_lock(ptep);
__ptep_ipte(address, ptep);
ptep_rcp_copy(ptep);

5
arch/s390/include/asm/thread_info.h
View File

@ -15,13 +15,8 @@
* Size of kernel stack for each process
*/
#ifndef __s390x__
#ifndef __SMALL_STACK
#define THREAD_ORDER 1
#define ASYNC_ORDER 1
#else
#define THREAD_ORDER 0
#define ASYNC_ORDER 0
#endif
#else /* __s390x__ */
#ifndef __SMALL_STACK
#define THREAD_ORDER 2

24
arch/s390/kernel/smp.c
View File

@ -1119,9 +1119,7 @@ int __ref smp_rescan_cpus(void)
return rc;
}
static ssize_t __ref rescan_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf,
static ssize_t __ref rescan_store(struct sysdev_class *class, const char *buf,
size_t count)
{
int rc;
@ -1129,12 +1127,10 @@ static ssize_t __ref rescan_store(struct sys_device *dev,
rc = smp_rescan_cpus();
return rc ? rc : count;
}
static SYSDEV_ATTR(rescan, 0200, NULL, rescan_store);
static SYSDEV_CLASS_ATTR(rescan, 0200, NULL, rescan_store);
#endif /* CONFIG_HOTPLUG_CPU */
static ssize_t dispatching_show(struct sys_device *dev,
struct sysdev_attribute *attr,
char *buf)
static ssize_t dispatching_show(struct sysdev_class *class, char *buf)
{
ssize_t count;
@ -1144,9 +1140,8 @@ static ssize_t dispatching_show(struct sys_device *dev,
return count;
}
static ssize_t dispatching_store(struct sys_device *dev,
struct sysdev_attribute *attr,
const char *buf, size_t count)
static ssize_t dispatching_store(struct sysdev_class *dev, const char *buf,
size_t count)
{
int val, rc;
char delim;
@ -1168,7 +1163,8 @@ static ssize_t dispatching_store(struct sys_device *dev,
put_online_cpus();
return rc ? rc : count;
}
static SYSDEV_ATTR(dispatching, 0644, dispatching_show, dispatching_store);
static SYSDEV_CLASS_ATTR(dispatching, 0644, dispatching_show,
dispatching_store);
static int __init topology_init(void)
{
@ -1178,13 +1174,11 @@ static int __init topology_init(void)
register_cpu_notifier(&smp_cpu_nb);
#ifdef CONFIG_HOTPLUG_CPU
rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
&attr_rescan.attr);
rc = sysdev_class_create_file(&cpu_sysdev_class, &attr_rescan);
if (rc)
return rc;
#endif
rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj,
&attr_dispatching.attr);
rc = sysdev_class_create_file(&cpu_sysdev_class, &attr_dispatching);
if (rc)
return rc;
for_each_present_cpu(cpu) {

16
arch/s390/mm/pgtable.c
View File

@ -169,7 +169,7 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
unsigned long *table;
unsigned long bits;
bits = (mm->context.noexec || mm->context.pgstes) ? 3UL : 1UL;
bits = (mm->context.noexec || mm->context.has_pgste) ? 3UL : 1UL;
spin_lock(&mm->page_table_lock);
page = NULL;
if (!list_empty(&mm->context.pgtable_list)) {
@ -186,7 +186,7 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
pgtable_page_ctor(page);
page->flags &= ~FRAG_MASK;
table = (unsigned long *) page_to_phys(page);
if (mm->context.pgstes)
if (mm->context.has_pgste)
clear_table_pgstes(table);
else
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
@ -210,7 +210,7 @@ void page_table_free(struct mm_struct *mm, unsigned long *table)
struct page *page;
unsigned long bits;
bits = (mm->context.noexec || mm->context.pgstes) ? 3UL : 1UL;
bits = (mm->context.noexec || mm->context.has_pgste) ? 3UL : 1UL;
bits <<= (__pa(table) & (PAGE_SIZE - 1)) / 256 / sizeof(unsigned long);
page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
spin_lock(&mm->page_table_lock);
@ -257,7 +257,7 @@ int s390_enable_sie(void)
struct mm_struct *mm, *old_mm;
/* Do we have pgstes? if yes, we are done */
if (tsk->mm->context.pgstes)
if (tsk->mm->context.has_pgste)
return 0;
/* lets check if we are allowed to replace the mm */
@ -269,14 +269,14 @@ int s390_enable_sie(void)
}
task_unlock(tsk);
/* we copy the mm with pgstes enabled */
tsk->mm->context.pgstes = 1;
/* we copy the mm and let dup_mm create the page tables with_pgstes */
tsk->mm->context.alloc_pgste = 1;
mm = dup_mm(tsk);
tsk->mm->context.pgstes = 0;
tsk->mm->context.alloc_pgste = 0;
if (!mm)
return -ENOMEM;
/* Now lets check again if somebody attached ptrace etc */
/* Now lets check again if something happened */
task_lock(tsk);
if (!tsk->mm || atomic_read(&tsk->mm->mm_users) > 1 ||
tsk->mm != tsk->active_mm || tsk->mm->ioctx_list) {

6
drivers/s390/char/tape_block.c
View File

@ -76,7 +76,7 @@ tapeblock_trigger_requeue(struct tape_device *device)
static void
tapeblock_end_request(struct request *req, int error)
{
if (__blk_end_request(req, error, blk_rq_bytes(req)))
if (blk_end_request(req, error, blk_rq_bytes(req)))
BUG();
}
@ -166,7 +166,7 @@ tapeblock_requeue(struct work_struct *work) {
nr_queued++;
spin_unlock(get_ccwdev_lock(device->cdev));
spin_lock(&device->blk_data.request_queue_lock);
spin_lock_irq(&device->blk_data.request_queue_lock);
while (
!blk_queue_plugged(queue) &&
elv_next_request(queue) &&
@ -176,7 +176,9 @@ tapeblock_requeue(struct work_struct *work) {
if (rq_data_dir(req) == WRITE) {
DBF_EVENT(1, "TBLOCK: Rejecting write request\n");
blkdev_dequeue_request(req);
spin_unlock_irq(&device->blk_data.request_queue_lock);
tapeblock_end_request(req, -EIO);
spin_lock_irq(&device->blk_data.request_queue_lock);
continue;
}
blkdev_dequeue_request(req);

8
drivers/s390/char/tape_core.c
View File

@ -1200,7 +1200,7 @@ tape_open(struct tape_device *device)
{
int rc;
spin_lock(get_ccwdev_lock(device->cdev));
spin_lock_irq(get_ccwdev_lock(device->cdev));
if (device->tape_state == TS_NOT_OPER) {
DBF_EVENT(6, "TAPE:nodev\n");
rc = -ENODEV;
@ -1218,7 +1218,7 @@ tape_open(struct tape_device *device)
tape_state_set(device, TS_IN_USE);
rc = 0;
}
spin_unlock(get_ccwdev_lock(device->cdev));
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return rc;
}
@ -1228,11 +1228,11 @@ tape_open(struct tape_device *device)
int
tape_release(struct tape_device *device)
{
spin_lock(get_ccwdev_lock(device->cdev));
spin_lock_irq(get_ccwdev_lock(device->cdev));
if (device->tape_state == TS_IN_USE)
tape_state_set(device, TS_UNUSED);
module_put(device->discipline->owner);
spin_unlock(get_ccwdev_lock(device->cdev));
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return 0;
}

19
drivers/s390/cio/qdio_debug.c
View File

@ -20,6 +20,7 @@ static struct dentry *debugfs_root;
#define MAX_DEBUGFS_QUEUES 32
static struct dentry *debugfs_queues[MAX_DEBUGFS_QUEUES] = { NULL };
static DEFINE_MUTEX(debugfs_mutex);
#define QDIO_DEBUGFS_NAME_LEN 40
void qdio_allocate_do_dbf(struct qdio_initialize *init_data)
{
@ -152,17 +153,6 @@ static int qstat_seq_open(struct inode *inode, struct file *filp)
filp->f_path.dentry->d_inode->i_private);
}
static void get_queue_name(struct qdio_q *q, struct ccw_device *cdev, char *name)
{
memset(name, 0, sizeof(name));
sprintf(name, "%s", dev_name(&cdev->dev));
if (q->is_input_q)
sprintf(name + strlen(name), "_input");
else
sprintf(name + strlen(name), "_output");
sprintf(name + strlen(name), "_%d", q->nr);
}
static void remove_debugfs_entry(struct qdio_q *q)
{
int i;
@ -189,14 +179,17 @@ static struct file_operations debugfs_fops = {
static void setup_debugfs_entry(struct qdio_q *q, struct ccw_device *cdev)
{
int i = 0;
char name[40];
char name[QDIO_DEBUGFS_NAME_LEN];
while (debugfs_queues[i] != NULL) {
i++;
if (i >= MAX_DEBUGFS_QUEUES)
return;
}
get_queue_name(q, cdev, name);
snprintf(name, QDIO_DEBUGFS_NAME_LEN, "%s_%s_%d",
dev_name(&cdev->dev),
q->is_input_q ? "input" : "output",
q->nr);
debugfs_queues[i] = debugfs_create_file(name, S_IFREG | S_IRUGO | S_IWUSR,
debugfs_root, q, &debugfs_fops);
}

1
drivers/s390/cio/qdio_main.c
View File

@ -1083,7 +1083,6 @@ void qdio_int_handler(struct ccw_device *cdev, unsigned long intparm,
case -EIO:
sprintf(dbf_text, "ierr%4x", irq_ptr->schid.sch_no);
QDIO_DBF_TEXT2(1, setup, dbf_text);
qdio_int_error(cdev);
return;
case -ETIMEDOUT:
sprintf(dbf_text, "qtoh%4x", irq_ptr->schid.sch_no);