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[PATCH 7/7] BC: kernel memory (marks) [message #5746 is a reply to message #5738] Tue, 29 August 2006 14:56 Go to previous message
dev is currently offline  dev
Messages: 1693
Registered: September 2005
Location: Moscow
Senior Member
Mark some kmem caches with SLAB_BC and some allocations
with __GFP_BC to cause charging/limiting of appropriate
kernel resources.

Signed-off-by: Pavel Emelianov <xemul@sw.ru>
Signed-off-by: Kirill Korotaev <dev@sw.ru>

---

arch/i386/kernel/ldt.c | 4 ++--
arch/i386/mm/init.c | 4 ++--
arch/i386/mm/pgtable.c | 6 ++++--
drivers/char/tty_io.c | 10 +++++-----
fs/file.c | 8 ++++----
fs/locks.c | 2 +-
fs/namespace.c | 3 ++-
fs/select.c | 7 ++++---
include/asm-i386/thread_info.h | 4 ++--
include/asm-ia64/pgalloc.h | 24 +++++++++++++++++-------
include/asm-x86_64/pgalloc.h | 12 ++++++++----
include/asm-x86_64/thread_info.h | 5 +++--
ipc/msgutil.c | 4 ++--
ipc/sem.c | 7 ++++---
ipc/util.c | 8 ++++----
kernel/fork.c | 15 ++++++++-------
kernel/posix-timers.c | 3 ++-
kernel/signal.c | 2 +-
kernel/user.c | 2 +-
mm/rmap.c | 3 ++-
mm/shmem.c | 3 ++-
21 files changed, 80 insertions(+), 56 deletions(-)

--- ./arch/i386/kernel/ldt.c.bckmemc 2006-08-28 12:20:10.000000000 +0400
+++ ./arch/i386/kernel/ldt.c 2006-08-28 13:05:46.000000000 +0400
@@ -39,9 +39,9 @@ static int alloc_ldt(mm_context_t *pc, i
oldsize = pc->size;
mincount = (mincount+511)&(~511);
if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
- newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
+ newldt = vmalloc_bc(mincount*LDT_ENTRY_SIZE);
else
- newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
+ newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL_BC);

if (!newldt)
return -ENOMEM;
--- ./arch/i386/mm/init.c.bckmemc 2006-08-28 12:20:10.000000000 +0400
+++ ./arch/i386/mm/init.c 2006-08-28 13:05:46.000000000 +0400
@@ -709,7 +709,7 @@ void __init pgtable_cache_init(void)
pmd_cache = kmem_cache_create("pmd",
PTRS_PER_PMD*sizeof(pmd_t),
PTRS_PER_PMD*sizeof(pmd_t),
- 0,
+ SLAB_BC,
pmd_ctor,
NULL);
if (!pmd_cache)
@@ -718,7 +718,7 @@ void __init pgtable_cache_init(void)
pgd_cache = kmem_cache_create("pgd",
PTRS_PER_PGD*sizeof(pgd_t),
PTRS_PER_PGD*sizeof(pgd_t),
- 0,
+ SLAB_BC,
pgd_ctor,
PTRS_PER_PMD == 1 ? pgd_dtor : NULL);
if (!pgd_cache)
--- ./arch/i386/mm/pgtable.c.bckmemc 2006-08-28 12:20:10.000000000 +0400
+++ ./arch/i386/mm/pgtable.c 2006-08-28 13:05:46.000000000 +0400
@@ -186,9 +186,11 @@ struct page *pte_alloc_one(struct mm_str
struct page *pte;

#ifdef CONFIG_HIGHPTE
- pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO , 0);
+ pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT|__GFP_ZERO |
+ __GFP_BC | __GFP_BC_LIMIT, 0);
#else
- pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+ pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO|
+ __GFP_BC | __GFP_BC_LIMIT, 0);
#endif
return pte;
}
--- ./drivers/char/tty_io.c.bckmemc 2006-08-28 12:20:11.000000000 +0400
+++ ./drivers/char/tty_io.c 2006-08-28 13:05:46.000000000 +0400
@@ -165,7 +165,7 @@ static void release_mem(struct tty_struc

static struct tty_struct *alloc_tty_struct(void)
{
- return kzalloc(sizeof(struct tty_struct), GFP_KERNEL);
+ return kzalloc(sizeof(struct tty_struct), GFP_KERNEL_BC);
}

static void tty_buffer_free_all(struct tty_struct *);
@@ -1904,7 +1904,7 @@ static int init_dev(struct tty_driver *d

if (!*tp_loc) {
tp = (struct termios *) kmalloc(sizeof(struct termios),
- GFP_KERNEL);
+ GFP_KERNEL_BC);
if (!tp)
goto free_mem_out;
*tp = driver->init_termios;
@@ -1912,7 +1912,7 @@ static int init_dev(struct tty_driver *d

if (!*ltp_loc) {
ltp = (struct termios *) kmalloc(sizeof(struct termios),
- GFP_KERNEL);
+ GFP_KERNEL_BC);
if (!ltp)
goto free_mem_out;
memset(ltp, 0, sizeof(struct termios));
@@ -1937,7 +1937,7 @@ static int init_dev(struct tty_driver *d

if (!*o_tp_loc) {
o_tp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ kmalloc(sizeof(struct termios), GFP_KERNEL_BC);
if (!o_tp)
goto free_mem_out;
*o_tp = driver->other->init_termios;
@@ -1945,7 +1945,7 @@ static int init_dev(struct tty_driver *d

if (!*o_ltp_loc) {
o_ltp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ kmalloc(sizeof(struct termios), GFP_KERNEL_BC);
if (!o_ltp)
goto free_mem_out;
memset(o_ltp, 0, sizeof(struct termios));
--- ./fs/file.c.bckmemc 2006-08-28 12:20:12.000000000 +0400
+++ ./fs/file.c 2006-08-28 13:05:46.000000000 +0400
@@ -44,9 +44,9 @@ struct file ** alloc_fd_array(int num)
int size = num * sizeof(struct file *);

if (size <= PAGE_SIZE)
- new_fds = (struct file **) kmalloc(size, GFP_KERNEL);
+ new_fds = (struct file **) kmalloc(size, GFP_KERNEL_BC);
else
- new_fds = (struct file **) vmalloc(size);
+ new_fds = (struct file **) vmalloc_bc(size);
return new_fds;
}

@@ -213,9 +213,9 @@ fd_set * alloc_fdset(int num)
int size = num / 8;

if (size <= PAGE_SIZE)
- new_fdset = (fd_set *) kmalloc(size, GFP_KERNEL);
+ new_fdset = (fd_set *) kmalloc(size, GFP_KERNEL_BC);
else
- new_fdset = (fd_set *) vmalloc(size);
+ new_fdset = (fd_set *) vmalloc_bc(size);
return new_fdset;
}

--- ./fs/locks.c.bckmemc 2006-08-28 12:20:12.000000000 +0400
+++ ./fs/locks.c 2006-08-28 13:05:46.000000000 +0400
@@ -2228,7 +2228,7 @@ EXPORT_SYMBOL(lock_may_write);
static int __init filelock_init(void)
{
filelock_cache = kmem_cache_create("file_lock_cache",
- sizeof(struct file_lock), 0, SLAB_PANIC,
+ sizeof(struct file_lock), 0, SLAB_PANIC | SLAB_BC,
init_once, NULL);
return 0;
}
--- ./fs/namespace.c.bckmemc 2006-08-28 12:20:12.000000000 +0400
+++ ./fs/namespace.c 2006-08-28 13:05:46.000000000 +0400
@@ -1813,7 +1813,8 @@ void __init mnt_init(unsigned long mempa
init_rwsem(&namespace_sem);

mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct vfsmount),
- 0, SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL, NULL);
+ 0, SLAB_HWCACHE_ALIGN | SLAB_BC | SLAB_PANIC,
+ NULL, NULL);

mount_hashtable = (struct list_head *)__get_free_page(GFP_ATOMIC);

--- ./fs/select.c.bckmemc 2006-08-28 12:20:12.000000000 +0400
+++ ./fs/select.c 2006-08-28 13:05:46.000000000 +0400
@@ -103,7 +103,8 @@ static struct poll_table_entry *poll_get
if (!table || POLL_TABLE_FULL(table)) {
struct poll_table_page *new_table;

- new_table = (struct poll_table_page *) __get_free_page(GFP_KERNEL);
+ new_table = (struct poll_table_page *)
+ __get_free_page(GFP_KERNEL_BC);
if (!new_table) {
p->error = -ENOMEM;
__set_current_state(TASK_RUNNING);
@@ -339,7 +340,7 @@ static int core_sys_select(int n, fd_set
if (size > sizeof(stack_fds) / 6) {
/* Not enough space in on-stack array; must use kmalloc */
ret = -ENOMEM;
- bits = kmalloc(6 * size, GFP_KERNEL);
+ bits = kmalloc(6 * size, GFP_KERNEL_BC);
if (!bits)
goto out_nofds;
}
@@ -693,7 +694,7 @@ int do_sys_poll(struct pollfd __user *uf
if (!stack_pp)
stack_pp = pp = (struct poll_list *)stack_pps;
else {
- pp = kmalloc(size, GFP_KERNEL);
+ pp = kmalloc(size, GFP_KERNEL_BC);
if (!pp)
goto out_fds;
}
--- ./include/asm-i386/thread_info.h.bckmemc 2006-07-10 12:39:19.000000000 +0400
+++ ./include/asm-i386/thread_info.h 2006-08-28 13:05:46.000000000 +0400
@@ -99,13 +99,13 @@ static inline struct thread_info *curren
({ \
struct thread_info *ret; \
\
- ret = kmalloc(THREAD_SIZE, GFP_KERNEL); \
+ ret = kmalloc(THREAD_SIZE, GFP_KERNEL_BC); \
if (ret) \
memset(ret, 0, THREAD_SIZE); \
ret; \
})
#else
-#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL_BC)
#endif

#define free_thread_info(info) kfree(info)
--- ./include/asm-ia64/pgalloc.h.bckmemc 2006-07-10 12:39:19.000000000 +0400
+++ ./include/asm-ia64/pgalloc.h 2006-08-28 13:05:46.000000000 +0400
@@ -19,6 +19,8 @@
#include <linux/page-flags.h>
#include <linux/threads.h>

+#include <bc/kmem.h>
+
#include <asm/mmu_context.h>

DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist);
@@ -37,7 +39,7 @@ static inline long pgtable_quicklist_tot
return ql_size;
}

-static inline void *pgtable_quicklist_alloc(void)
+static inline void *pgtable_quicklist_alloc(int charge)
{
unsigned long *ret = NULL;

@@ -45,13 +47,20 @@ static inline void *pgtable_quicklist_al

ret = pgtable_quicklist;
if (likely(ret != NULL)) {
+ if (charge && bc_page_charge(virt_to_page(ret),
+ 0, __GFP_BC_LIMIT)) {
+ ret = NULL;
+ goto out;
+ }
pgtable_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
--pgtable_quicklist_size;
+out:
preempt_enable();
} else {
preempt_enable();
- ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+ ret = (unsigned long *)__get_free_page(GFP_KERNEL |
+ __GFP_ZERO | __GFP_BC | __GFP_BC_LIMIT);
}

return ret;
@@ -69,6 +78,7 @@ static inline void pgtable_quicklist_fre
#endif

preempt_disable();
+ bc_page_uncharge(virt_to_page(pgtable_entry), 0);
*(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist;
pgtable_quicklist = (unsigned long *)pgtable_entry;
++pgtable_quicklist_size;
@@ -77,7 +87,7 @@ static inline void pgtable_quicklist_fre

static inline pgd_t *pgd_alloc(struct mm_struct *mm)
{
- return pgtable_quicklist_alloc();
+ return pgtable_quicklist_alloc(1);
}

static inline void pgd_free(pgd_t * pgd)
@@ -94,7 +104,7 @@ pgd_populate(struct mm_struct *mm, pgd_t

static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
{
- return pgtable_quicklist_alloc();
+ return pgtable_ ...

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