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Message-ID: <20141219015923.GA13182@bbox>
Date: Fri, 19 Dec 2014 10:59:23 +0900
From: Minchan Kim <minchan@...nel.org>
To: Ganesh Mahendran <opensource.ganesh@...il.com>
Cc: Nitin Gupta <ngupta@...are.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux-MM <linux-mm@...ck.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mm/zsmalloc: add statistics support
On Fri, Dec 19, 2014 at 09:49:29AM +0800, Ganesh Mahendran wrote:
> 2014-12-19 9:30 GMT+08:00 Minchan Kim <minchan@...nel.org>:
> > On Fri, Dec 19, 2014 at 09:21:52AM +0800, Ganesh Mahendran wrote:
> >> Hello, Minchan
> >>
> >> 2014-12-19 7:44 GMT+08:00 Minchan Kim <minchan@...nel.org>:
> >> > Hello Ganesh,
> >> >
> >> > On Wed, Dec 17, 2014 at 03:05:19PM +0800, Ganesh Mahendran wrote:
> >> >> Hello, Minchan
> >> >>
> >> >> Thanks for your review.
> >> >>
> >> >> 2014-12-16 10:45 GMT+08:00 Minchan Kim <minchan@...nel.org>:
> >> >> > On Sat, Dec 13, 2014 at 09:45:14PM +0800, Ganesh Mahendran wrote:
> >> >> >> As a ram based memory allocator, keep the fragmentation in a low level
> >> >> >
> >> >> > Just say, zsmalloc.
> >> >>
> >> >> Ok.
> >> >>
> >> >> >
> >> >> >> is our target. But now we still need to add the debug code in zsmalloc
> >> >> >> to get the quantitative data.
> >> >> >>
> >> >> >> After the RFC patch [1], Minchan Kim gave some suggestions.
> >> >> >> [1] https://patchwork.kernel.org/patch/5469301/
> >> >> >>
> >> >> >> This patch adds a new configuration CONFIG_ZSMALLOC_STAT to enable the statistics
> >> >> >> collection for developers. Currently only the objects information in each class
> >> >> >> are collected. User can get the information via debugfs. For example:
> >> >> >>
> >> >> >> After I copy file jdk-8u25-linux-x64.tar.gz to zram with ext4 filesystem.
> >> >> >> class size obj_allocated obj_used pages_used
> >> >> >> 0 32 0 0 0
> >> >> >> 1 48 256 12 3
> >> >> >> 2 64 64 14 1
> >> >> >> 3 80 51 7 1
> >> >> >> 4 96 128 5 3
> >> >> >> 5 112 73 5 2
> >> >> >> 6 128 32 4 1
> >> >> >> 7 144 0 0 0
> >> >> >> 8 160 0 0 0
> >> >> >> 9 176 0 0 0
> >> >> >> 10 192 0 0 0
> >> >> >> 11 208 0 0 0
> >> >> >> 12 224 0 0 0
> >> >> >> 13 240 0 0 0
> >> >> >> 14 256 16 1 1
> >> >> >> 15 272 15 9 1
> >> >> >> 16 288 0 0 0
> >> >> >> 17 304 0 0 0
> >> >> >> 18 320 0 0 0
> >> >> >> 19 336 0 0 0
> >> >> >> 20 352 0 0 0
> >> >> >> 21 368 0 0 0
> >> >> >> 22 384 0 0 0
> >> >> >> 23 400 0 0 0
> >> >> >> 24 416 0 0 0
> >> >> >> 25 432 0 0 0
> >> >> >> 26 448 0 0 0
> >> >> >> 27 464 0 0 0
> >> >> >> 28 480 0 0 0
> >> >> >> 29 496 33 1 4
> >> >> >> 30 512 0 0 0
> >> >> >> 31 528 0 0 0
> >> >> >> 32 544 0 0 0
> >> >> >> 33 560 0 0 0
> >> >> >> 34 576 0 0 0
> >> >> >> 35 592 0 0 0
> >> >> >> 36 608 0 0 0
> >> >> >> 37 624 0 0 0
> >> >> >> 38 640 0 0 0
> >> >> >> 40 672 0 0 0
> >> >> >> 42 704 0 0 0
> >> >> >> 43 720 17 1 3
> >> >> >> 44 736 0 0 0
> >> >> >> 46 768 0 0 0
> >> >> >> 49 816 0 0 0
> >> >> >> 51 848 0 0 0
> >> >> >> 52 864 14 1 3
> >> >> >> 54 896 0 0 0
> >> >> >> 57 944 13 1 3
> >> >> >> 58 960 0 0 0
> >> >> >> 62 1024 4 1 1
> >> >> >> 66 1088 15 2 4
> >> >> >> 67 1104 0 0 0
> >> >> >> 71 1168 0 0 0
> >> >> >> 74 1216 0 0 0
> >> >> >> 76 1248 0 0 0
> >> >> >> 83 1360 3 1 1
> >> >> >> 91 1488 11 1 4
> >> >> >> 94 1536 0 0 0
> >> >> >> 100 1632 5 1 2
> >> >> >> 107 1744 0 0 0
> >> >> >> 111 1808 9 1 4
> >> >> >> 126 2048 4 4 2
> >> >> >> 144 2336 7 3 4
> >> >> >> 151 2448 0 0 0
> >> >> >> 168 2720 15 15 10
> >> >> >> 190 3072 28 27 21
> >> >> >> 202 3264 0 0 0
> >> >> >> 254 4096 36209 36209 36209
> >> >> >>
> >> >> >> Total 37022 36326 36288
> >> >> >>
> >> >> >> We can see the overall fragentation is:
> >> >> >> (37022 - 36326) / 37022 = 1.87%
> >> >> >>
> >> >> >> Also from the statistics we know why we got so low fragmentation:
> >> >> >> Most of the objects is in class 254 with size 4096 Bytes. The pages in
> >> >> >> zspage is 1. And there is only one object in a page. So, No fragmentation
> >> >> >> will be produced.
> >> >> >>
> >> >> >> Also we can collect other information and show it to user in the future.
> >> >> >
> >> >> > So, could you make zs
> >> >> Ok
> >> >> >>
> >> >> >> Signed-off-by: Ganesh Mahendran <opensource.ganesh@...il.com>
> >> >> >> Suggested-by: Minchan Kim <minchan@...nel.org>
> >> >> >> ---
> >> >> >> mm/Kconfig | 10 ++++
> >> >> >> mm/zsmalloc.c | 164 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> >> >> >> 2 files changed, 174 insertions(+)
> >> >> >>
> >> >> >> diff --git a/mm/Kconfig b/mm/Kconfig
> >> >> >> index 1d1ae6b..95c5728 100644
> >> >> >> --- a/mm/Kconfig
> >> >> >> +++ b/mm/Kconfig
> >> >> >> @@ -601,6 +601,16 @@ config PGTABLE_MAPPING
> >> >> >> You can check speed with zsmalloc benchmark:
> >> >> >> https://github.com/spartacus06/zsmapbench
> >> >> >>
> >> >> >> +config ZSMALLOC_STAT
> >> >> >> + bool "Export zsmalloc statistics"
> >> >> >> + depends on ZSMALLOC
> >> >> >> + select DEBUG_FS
> >> >> >> + help
> >> >> >> + This option enables code in the zsmalloc to collect various
> >> >> >> + statistics about whats happening in zsmalloc and exports that
> >> >> >> + information to userspace via debugfs.
> >> >> >> + If unsure, say N.
> >> >> >> +
> >> >> >> config GENERIC_EARLY_IOREMAP
> >> >> >> bool
> >> >> >>
> >> >> >> diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
> >> >> >> index b724039..a8d0020 100644
> >> >> >> --- a/mm/zsmalloc.c
> >> >> >> +++ b/mm/zsmalloc.c
> >> >> >> @@ -168,6 +168,8 @@ enum fullness_group {
> >> >> >> ZS_FULL
> >> >> >> };
> >> >> >>
> >> >> >> +static int zs_pool_num;
> >> >> >
> >> >> > What's this? What protects the race?
> >> >> It is the pool index. Yes, there is problem here.
> >> >> I will change it to atomic and increased every time a new zs pool created.
> >> >> And then name the /sys/kernel/debug/pool-x using this index.
> >> >>
> >> >> static atomic_t zs_pool_index = ATOMIC_INIT(0);
> >> >> ...
> >> >> pool->index = atomic_inc_return(&zs_pool_index);
> >> >>
> >> >> > It means description.
> >> >> >
> >> >> >> +
> >> >> >> /*
> >> >> >> * number of size_classes
> >> >> >> */
> >> >> >> @@ -200,6 +202,11 @@ struct size_class {
> >> >> >> /* Number of PAGE_SIZE sized pages to combine to form a 'zspage' */
> >> >> >> int pages_per_zspage;
> >> >> >>
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + unsigned long obj_allocated;
> >> >> >> + unsigned long obj_used;
> >> >> >> +#endif
> >> >> >
> >> >> > I perfer creating new struct.
> >> >> >
> >> >> > struct zs_size_stat {
> >> >> > unsigend long obj_allocated;
> >> >> > unsignged long obj_used;
> >> >> > };
> >> >>
> >> >> Got it, I will redo this.
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> spinlock_t lock;
> >> >> >>
> >> >> >> struct page *fullness_list[_ZS_NR_FULLNESS_GROUPS];
> >> >> >> @@ -221,6 +228,10 @@ struct zs_pool {
> >> >> >>
> >> >> >> gfp_t flags; /* allocation flags used when growing pool */
> >> >> >> atomic_long_t pages_allocated;
> >> >> >> +
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + struct dentry *stat_dentry;
> >> >> >> +#endif
> >> >> >> };
> >> >> >>
> >> >> >> /*
> >> >> >> @@ -942,6 +953,132 @@ static bool can_merge(struct size_class *prev, int size, int pages_per_zspage)
> >> >> >> return true;
> >> >> >> }
> >> >> >>
> >> >> >> +
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> +#include <linux/debugfs.h>
> >> >> >
> >> >> > A question:
> >> >> > Why "#include" is here instead of top on the source file?
> >> >>
> >> >> Yes, the "#include ..." should be on the top of the source file.
> >> >> I will modify it.
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> +static struct dentry *zs_stat_root;
> >> >> >> +
> >> >> >> +static int __init zs_stat_init(void)
> >> >> >> +{
> >> >> >> + if (!debugfs_initialized())
> >> >> >> + return -ENODEV;
> >> >> >
> >> >> > Do we need above check?
> >> >> Yes, I think we need this check.
> >> >> When debugfs module init failed, we should not go ahead here.
> >> >>
> >> >> >
> >> >> > When I read comment of debugfs_create_dir, it says
> >> >> > "If debugfs is not enabled in the kernel, the value -%ENODEV will be
> >> >> > returned."
> >> >>
> >> >> This check is not for the situation when the debugfs is not enabled.
> >> >> But for if we failed in debugfs_init(), then
> >> >> we should not use any API of debugfs.
> >> >>
> >> >> And I think "-%ENODEV will be returned" means below code in "debugfs.h"
> >> >>
> >> >> static inline struct dentry *debugfs_create_dir(const char *name,
> >> >> struct dentry *parent)
> >> >> {
> >> >> return ERR_PTR(-ENODEV);
> >> >> }
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> + zs_stat_root = debugfs_create_dir("zsmalloc", NULL);
> >> >> >> + if (!zs_stat_root)
> >> >> >> + return -ENOMEM;
> >> >> >
> >> >> > On null return of debugfs_create_dir, it means always ENOMEM?
> >> >>
> >> >> Yes, you are right. -ENOMEM is not the only reason for the failure.
> >> >> But debugfs_create_dir does not bring back the errno.
> >> >> And for zsmalloc, we indeed have the permission(-EPERM) to create the entry and
> >> >> also we will not create duplicate(-EEXIST) entry in debufs.
> >> >>
> >> >> So, I think -ENOMEM is suitable.
> >> >
> >> > It seems you are saying why debugfs_create_dir can fail but zsmalloc will not
> >> > fail by such reasons.
> >> > I don't know the internal of debugfs_create_dir but description just says
> >> > "If an error occurs, %NULL will be returned" but everyone returns ENOMEM
> >> > blindly then. Hmm, I don't think it's good but I'm okay too because it's not
> >> > our fault and others have been in there. :(
> >> >
> >> > When I look at zs_init, you don't propagate the error to user. Just missing?
> >>
> >> As the statistics collection is not essential to user, and I think we
> >> do not need to break
> >> the zsmalloc module loading when error happens in
> >> zs_stat_init()/debugfs_create_dir().
> >> So I do not propagate the error to user and just give the message:
> >> pr_warn("zs stat initialization failed\n");
> >
> > Hmm? So you want to work without stat although user want?
>
> It seems we should allow user to know there is something wrong
> happened in module loading.
True.
>
> In the beginning, I just considered that it was only a debug option.
> When developers enable
> this option in the end-user's machine, It should not affect zsmalloc's
> basic function.
>
> > It means every zs_stat_[inc|dec] should check if it was initialized properly?
>
> In zs_stat_[inc|dec], these functions only handle the fields in struct
> size_class{}. So we do not need
> to check whether it was .initialized properly. But when failed in
> zs_stat_init(), there is
> no way to show these statistics to user.
Indeed.
Thanks for the quick response!
>
> >
> >>
> >> Thanks.
> >>
> >> >
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> + return 0;
> >> >> >> +}
> >> >> >> +
> >> >> >> +static void __exit zs_stat_exit(void)
> >> >> >> +{
> >> >> >> + debugfs_remove_recursive(zs_stat_root);
> >> >> >> +}
> >> >> >> +
> >> >> >> +static int zs_stats_show(struct seq_file *s, void *v)
> >> >> >> +{
> >> >> >> + int i;
> >> >> >> + struct zs_pool *pool = (struct zs_pool *)s->private;
> >> >> >> + struct size_class *class;
> >> >> >> + int objs_per_zspage;
> >> >> >> + unsigned long obj_allocated, obj_used, pages_used;
> >> >> >> + unsigned long total_objs = 0, total_used_objs = 0, total_pages = 0;
> >> >> >> +
> >> >> >> + seq_printf(s, " %5s %5s %13s %10s %10s\n", "class", "size",
> >> >> >> + "obj_allocated", "obj_used", "pages_used");
> >> >> >> +
> >> >> >> + for (i = 0; i < zs_size_classes; i++) {
> >> >> >> + class = pool->size_class[i];
> >> >> >> +
> >> >> >> + if (class->index != i)
> >> >> >> + continue;
> >> >> >> +
> >> >> >> + spin_lock(&class->lock);
> >> >> >> +
> >> >> >> + obj_allocated = class->obj_allocated;
> >> >> >> + obj_used = class->obj_used;
> >> >> >> + objs_per_zspage = get_maxobj_per_zspage(class->size,
> >> >> >> + class->pages_per_zspage);
> >> >> >> + pages_used = obj_allocated / objs_per_zspage *
> >> >> >> + class->pages_per_zspage;
> >> >> >
> >> >> > I think We don't need to protect class->pages_per_zspage with class->lock.
> >> >>
> >> >> Yes, you are right.
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> + spin_unlock(&class->lock);
> >> >> >> +
> >> >> >> + seq_printf(s, " %5u %5u %10lu %10lu %10lu\n", i, class->size,
> >> >> >> + obj_allocated, obj_used, pages_used);
> >> >> >> +
> >> >> >> + total_objs += class->obj_allocated;
> >> >> >> + total_used_objs += class->obj_used;
> >> >> >
> >> >> > You couldn't access class->fields without class lock.
> >> >> > Please, assign them into local variable under the lock and sum them without the lock.
> >> >>
> >> >> Got it. I will redo this.
> >> >>
> >> >> >
> >> >> >> + total_pages += pages_used;
> >> >> >> + }
> >> >> >> +
> >> >> >> + seq_puts(s, "\n");
> >> >> >> + seq_printf(s, " %5s %5s %10lu %10lu %10lu\n", "Total", "",
> >> >> >> + total_objs, total_used_objs, total_pages);
> >> >> >> +
> >> >> >> + return 0;
> >> >> >> +}
> >> >> >> +
> >> >> >> +static int zs_stats_open(struct inode *inode, struct file *file)
> >> >> >> +{
> >> >> >> + return single_open(file, zs_stats_show, inode->i_private);
> >> >> >> +}
> >> >> >> +
> >> >> >> +static const struct file_operations zs_stats_operations = {
> >> >> >> + .open = zs_stats_open,
> >> >> >> + .read = seq_read,
> >> >> >> + .llseek = seq_lseek,
> >> >> >> + .release = single_release,
> >> >> >> +};
> >> >> >> +
> >> >> >> +static int zs_pool_stat_create(struct zs_pool *pool, int index)
> >> >> >> +{
> >> >> >> + char name[10];
> >> >> >> + int ret = 0;
> >> >> >> +
> >> >> >> + if (!zs_stat_root) {
> >> >> >> + ret = -ENODEV;
> >> >> >> + goto out;
> >> >> >> + }
> >> >> >> +
> >> >> >> + snprintf(name, sizeof(name), "pool-%d", index);
> >> >> >
> >> >> > Hmm, how does admin know any zsmalloc instance is associated with
> >> >> > any block device?
> >> >> > Maybe we need export zspool index to the client and print it
> >> >> > when pool is populated.
> >> >>
> >> >> Thanks for your suggestion.
> >> >>
> >> >> >
> >> >> >> + pool->stat_dentry = debugfs_create_dir(name, zs_stat_root);
> >> >> >> + if (!pool->stat_dentry) {
> >> >> >> + ret = -ENOMEM;
> >> >> >> + goto out;
> >> >> >> + }
> >> >> >> +
> >> >> >> + debugfs_create_file("obj_in_classes", S_IFREG | S_IRUGO,
> >> >> >> + pool->stat_dentry, pool, &zs_stats_operations);
> >> >> >
> >> >> > No need to check return?
> >> >>
> >> >> It is better to check the return value and give user some information
> >> >> about the failure.
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> +out:
> >> >> >> + return ret;
> >> >> >> +}
> >> >> >> +
> >> >> >> +static void zs_pool_stat_destroy(struct zs_pool *pool)
> >> >> >> +{
> >> >> >> + debugfs_remove_recursive(pool->stat_dentry);
> >> >> >> +}
> >> >> >> +
> >> >> >> +#else /* CONFIG_ZSMALLOC_STAT */
> >> >> >> +
> >> >> >> +static int __init zs_stat_init(void)
> >> >> >> +{
> >> >> >> + return 0;
> >> >> >> +}
> >> >> >> +
> >> >> >> +static void __exit zs_stat_exit(void) { }
> >> >> >> +
> >> >> >> +static inline int zs_pool_stat_create(struct zs_pool *pool, int index)
> >> >> >> +{
> >> >> >> + return 0;
> >> >> >> +}
> >> >> >> +
> >> >> >> +static inline void zs_pool_stat_destroy(struct zs_pool *pool) { }
> >> >> >> +
> >> >> >> +#endif
> >> >> >> +
> >> >> >> unsigned long zs_get_total_pages(struct zs_pool *pool)
> >> >> >> {
> >> >> >> return atomic_long_read(&pool->pages_allocated);
> >> >> >> @@ -1075,6 +1212,10 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size)
> >> >> >> atomic_long_add(class->pages_per_zspage,
> >> >> >> &pool->pages_allocated);
> >> >> >> spin_lock(&class->lock);
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + class->obj_allocated += get_maxobj_per_zspage(class->size,
> >> >> >> + class->pages_per_zspage);
> >> >> >> +#endif
> >> >> >
> >> >> > I prefer zs_stat_inc(class, OBJ_ALLOCATED, get_max_obj());
> >> >>
> >> >> Got it. thanks
> >> >>
> >> >> >
> >> >> >> }
> >> >> >>
> >> >> >> obj = (unsigned long)first_page->freelist;
> >> >> >> @@ -1088,6 +1229,9 @@ unsigned long zs_malloc(struct zs_pool *pool, size_t size)
> >> >> >> kunmap_atomic(vaddr);
> >> >> >>
> >> >> >> first_page->inuse++;
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + class->obj_used++;
> >> >> >> +#endif
> >> >> >
> >> >> > zs_stat_inc(class, OBJ_USED, 1)
> >> >>
> >> >> OK
> >> >>
> >> >> >
> >> >> >
> >> >> >> /* Now move the zspage to another fullness group, if required */
> >> >> >> fix_fullness_group(pool, first_page);
> >> >> >> spin_unlock(&class->lock);
> >> >> >> @@ -1127,12 +1271,19 @@ void zs_free(struct zs_pool *pool, unsigned long obj)
> >> >> >> first_page->freelist = (void *)obj;
> >> >> >>
> >> >> >> first_page->inuse--;
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + class->obj_used--;
> >> >> >> +#endif
> >> >> >
> >> >> > zs_stat_dec(class, OBJ_USED, 1)
> >> >>
> >> >> OK
> >> >>
> >> >> >
> >> >> >> fullness = fix_fullness_group(pool, first_page);
> >> >> >> spin_unlock(&class->lock);
> >> >> >>
> >> >> >> if (fullness == ZS_EMPTY) {
> >> >> >> atomic_long_sub(class->pages_per_zspage,
> >> >> >> &pool->pages_allocated);
> >> >> >> +#ifdef CONFIG_ZSMALLOC_STAT
> >> >> >> + class->obj_allocated -= get_maxobj_per_zspage(class->size,
> >> >> >> + class->pages_per_zspage);
> >> >> >> +#endif
> >> >> >
> >> >> > zs_stat_dec(class, OBJ_ALLOCATED, get_max_obj());
> >> >> >
> >> >> >> free_zspage(first_page);
> >> >> >> }
> >> >> >> }
> >> >> >> @@ -1209,6 +1360,10 @@ struct zs_pool *zs_create_pool(gfp_t flags)
> >> >> >> }
> >> >> >>
> >> >> >> pool->flags = flags;
> >> >> >> + zs_pool_num++;
> >> >> >
> >> >> > Who protect the race?
> >> >> > And manybe we should keep the index in zspool and export it to the user
> >> >> > to let them know what zsmalloc instance is thiers.
> >> >>
> >> >> OK
> >> >>
> >> >> >
> >> >> >> +
> >> >> >> + if (zs_pool_stat_create(pool, zs_pool_num))
> >> >> >> + pr_warn("zs pool %d stat initialization failed\n", zs_pool_num);
> >> >> >>
> >> >> >> return pool;
> >> >> >>
> >> >> >> @@ -1241,6 +1396,9 @@ void zs_destroy_pool(struct zs_pool *pool)
> >> >> >> kfree(class);
> >> >> >> }
> >> >> >>
> >> >> >> + zs_pool_stat_destroy(pool);
> >> >> >> + zs_pool_num--;
> >> >> >> +
> >> >> >> kfree(pool->size_class);
> >> >> >> kfree(pool);
> >> >> >> }
> >> >> >> @@ -1260,6 +1418,10 @@ static int __init zs_init(void)
> >> >> >> #ifdef CONFIG_ZPOOL
> >> >> >> zpool_register_driver(&zs_zpool_driver);
> >> >> >> #endif
> >> >> >> +
> >> >> >> + if (zs_stat_init())
> >> >> >> + pr_warn("zs stat initialization failed\n");
> >> >> >> +
> >> >> >> return 0;
> >> >> >> }
> >> >> >>
> >> >> >> @@ -1269,6 +1431,8 @@ static void __exit zs_exit(void)
> >> >> >> zpool_unregister_driver(&zs_zpool_driver);
> >> >> >> #endif
> >> >> >> zs_unregister_cpu_notifier();
> >> >> >> +
> >> >> >> + zs_stat_exit();
> >> >> >> }
> >> >> >>
> >> >> >> module_init(zs_init);
> >> >> >> --
> >> >> >> 1.7.9.5
> >> >> >>
> >> >>
> >> >> --
> >> >> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> >> >> the body to majordomo@...ck.org. For more info on Linux MM,
> >> >> see: http://www.linux-mm.org/ .
> >> >> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
> >> >
> >> > --
> >> > Kind regards,
> >> > Minchan Kim
> >>
> >> --
> >> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> >> the body to majordomo@...ck.org. For more info on Linux MM,
> >> see: http://www.linux-mm.org/ .
> >> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
> >
> > --
> > Kind regards,
> > Minchan Kim
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@...ck.org. For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Don't email: <a href=mailto:"dont@...ck.org"> email@...ck.org </a>
--
Kind regards,
Minchan Kim
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