diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-04-26 17:33:56 +1000 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2013-04-26 17:33:56 +1000 |
commit | 4a911396c6fe5e9447ba726c0ac4eed3c3eac3d5 (patch) | |
tree | 3237f57ab7c2411cfb1e2440086001d06e6121e0 /drivers/staging/zcache | |
parent | fd0fcaf19bdf5643b26518c5b89867638d49588e (diff) | |
parent | a3949d83537e3aba2412276284865ed4e4a89ab3 (diff) |
Merge branch 'akpm/master'
Diffstat (limited to 'drivers/staging/zcache')
-rw-r--r-- | drivers/staging/zcache/Kconfig | 6 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster.h | 6 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster/debug.c | 2 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster/nodemanager.c | 9 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster/ramster.c | 29 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster/ramster.h | 2 | ||||
-rw-r--r-- | drivers/staging/zcache/ramster/ramster_nodemanager.h | 2 | ||||
-rw-r--r-- | drivers/staging/zcache/tmem.c | 6 | ||||
-rw-r--r-- | drivers/staging/zcache/tmem.h | 8 | ||||
-rw-r--r-- | drivers/staging/zcache/zcache-main.c | 64 | ||||
-rw-r--r-- | drivers/staging/zcache/zcache.h | 2 |
11 files changed, 104 insertions, 32 deletions
diff --git a/drivers/staging/zcache/Kconfig b/drivers/staging/zcache/Kconfig index 05e87a1e5d93..2d7b2da3b9e0 100644 --- a/drivers/staging/zcache/Kconfig +++ b/drivers/staging/zcache/Kconfig @@ -1,5 +1,5 @@ config ZCACHE - bool "Dynamic compression of swap pages and clean pagecache pages" + tristate "Dynamic compression of swap pages and clean pagecache pages" depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP select CRYPTO_LZO default n @@ -19,8 +19,8 @@ config ZCACHE_DEBUG how zcache is doing. You probably want to set this to 'N'. config RAMSTER - bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem" - depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE=y + tristate "Cross-machine RAM capacity sharing, aka peer-to-peer tmem" + depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE depends on NET # must ensure struct page is 8-byte aligned select HAVE_ALIGNED_STRUCT_PAGE if !64BIT diff --git a/drivers/staging/zcache/ramster.h b/drivers/staging/zcache/ramster.h index 1b71aea2ff62..e1f91d5a0f6a 100644 --- a/drivers/staging/zcache/ramster.h +++ b/drivers/staging/zcache/ramster.h @@ -11,10 +11,14 @@ #ifndef _ZCACHE_RAMSTER_H_ #define _ZCACHE_RAMSTER_H_ +#ifdef CONFIG_RAMSTER_MODULE +#define CONFIG_RAMSTER +#endif + #ifdef CONFIG_RAMSTER #include "ramster/ramster.h" #else -static inline void ramster_init(bool x, bool y, bool z) +static inline void ramster_init(bool x, bool y, bool z, bool w) { } diff --git a/drivers/staging/zcache/ramster/debug.c b/drivers/staging/zcache/ramster/debug.c index bf34133cc631..327e4f0d98e1 100644 --- a/drivers/staging/zcache/ramster/debug.c +++ b/drivers/staging/zcache/ramster/debug.c @@ -43,7 +43,7 @@ static struct debug_entry { }; #undef ATTR -int __init ramster_debugfs_init(void) +int ramster_debugfs_init(void) { int i; struct dentry *root = debugfs_create_dir("ramster", NULL); diff --git a/drivers/staging/zcache/ramster/nodemanager.c b/drivers/staging/zcache/ramster/nodemanager.c index c0f48158735d..2cfe93342c0d 100644 --- a/drivers/staging/zcache/ramster/nodemanager.c +++ b/drivers/staging/zcache/ramster/nodemanager.c @@ -949,7 +949,7 @@ static void __exit exit_r2nm(void) r2hb_exit(); } -static int __init init_r2nm(void) +int r2nm_init(void) { int ret = -1; @@ -986,10 +986,11 @@ out_r2hb: out: return ret; } +EXPORT_SYMBOL_GPL(r2nm_init); MODULE_AUTHOR("Oracle"); MODULE_LICENSE("GPL"); -/* module_init(init_r2nm) */ -late_initcall(init_r2nm); -/* module_exit(exit_r2nm) */ +#ifndef CONFIG_RAMSTER_MODULE +late_initcall(r2nm_init); +#endif diff --git a/drivers/staging/zcache/ramster/ramster.c b/drivers/staging/zcache/ramster/ramster.c index 87816279ce3c..b18b887db79f 100644 --- a/drivers/staging/zcache/ramster/ramster.c +++ b/drivers/staging/zcache/ramster/ramster.c @@ -121,6 +121,7 @@ int ramster_do_preload_flnode(struct tmem_pool *pool) kmem_cache_free(ramster_flnode_cache, flnode); return ret; } +EXPORT_SYMBOL_GPL(ramster_do_preload_flnode); /* * Called by the message handler after a (still compressed) page has been @@ -388,6 +389,7 @@ void *ramster_pampd_free(void *pampd, struct tmem_pool *pool, } return local_pampd; } +EXPORT_SYMBOL_GPL(ramster_pampd_free); void ramster_count_foreign_pages(bool eph, int count) { @@ -408,6 +410,7 @@ void ramster_count_foreign_pages(bool eph, int count) } } } +EXPORT_SYMBOL_GPL(ramster_count_foreign_pages); /* * For now, just push over a few pages every few seconds to @@ -593,7 +596,7 @@ requeue: ramster_remotify_queue_delayed_work(HZ); } -void __init ramster_remotify_init(void) +void ramster_remotify_init(void) { unsigned long n = 60UL; ramster_remotify_workqueue = @@ -768,8 +771,10 @@ static bool frontswap_selfshrinking __read_mostly; static void selfshrink_process(struct work_struct *work); static DECLARE_DELAYED_WORK(selfshrink_worker, selfshrink_process); +#ifndef CONFIG_RAMSTER_MODULE /* Enable/disable with kernel boot option. */ -static bool use_frontswap_selfshrink __initdata = true; +static bool use_frontswap_selfshrink = true; +#endif /* * The default values for the following parameters were deemed reasonable @@ -824,6 +829,7 @@ static void frontswap_selfshrink(void) frontswap_shrink(tgt_frontswap_pages); } +#ifndef CONFIG_RAMSTER_MODULE static int __init ramster_nofrontswap_selfshrink_setup(char *s) { use_frontswap_selfshrink = false; @@ -831,6 +837,7 @@ static int __init ramster_nofrontswap_selfshrink_setup(char *s) } __setup("noselfshrink", ramster_nofrontswap_selfshrink_setup); +#endif static void selfshrink_process(struct work_struct *work) { @@ -849,6 +856,7 @@ void ramster_cpu_up(int cpu) per_cpu(ramster_remoteputmem1, cpu) = p1; per_cpu(ramster_remoteputmem2, cpu) = p2; } +EXPORT_SYMBOL_GPL(ramster_cpu_up); void ramster_cpu_down(int cpu) { @@ -864,6 +872,7 @@ void ramster_cpu_down(int cpu) kp->flnode = NULL; } } +EXPORT_SYMBOL_GPL(ramster_cpu_down); void ramster_register_pamops(struct tmem_pamops *pamops) { @@ -874,9 +883,11 @@ void ramster_register_pamops(struct tmem_pamops *pamops) pamops->repatriate = ramster_pampd_repatriate; pamops->repatriate_preload = ramster_pampd_repatriate_preload; } +EXPORT_SYMBOL_GPL(ramster_register_pamops); -void __init ramster_init(bool cleancache, bool frontswap, - bool frontswap_exclusive_gets) +void ramster_init(bool cleancache, bool frontswap, + bool frontswap_exclusive_gets, + bool frontswap_selfshrink) { int ret = 0; @@ -891,10 +902,17 @@ void __init ramster_init(bool cleancache, bool frontswap, if (ret) pr_err("ramster: can't create sysfs for ramster\n"); (void)r2net_register_handlers(); +#ifdef CONFIG_RAMSTER_MODULE + ret = r2nm_init(); + if (ret) + pr_err("ramster: can't init r2net\n"); + frontswap_selfshrinking = frontswap_selfshrink; +#else + frontswap_selfshrinking = use_frontswap_selfshrink; +#endif INIT_LIST_HEAD(&ramster_rem_op_list); ramster_flnode_cache = kmem_cache_create("ramster_flnode", sizeof(struct flushlist_node), 0, 0, NULL); - frontswap_selfshrinking = use_frontswap_selfshrink; if (frontswap_selfshrinking) { pr_info("ramster: Initializing frontswap selfshrink driver.\n"); schedule_delayed_work(&selfshrink_worker, @@ -902,3 +920,4 @@ void __init ramster_init(bool cleancache, bool frontswap, } ramster_remotify_init(); } +EXPORT_SYMBOL_GPL(ramster_init); diff --git a/drivers/staging/zcache/ramster/ramster.h b/drivers/staging/zcache/ramster/ramster.h index 12ae56f09ca4..6d41a7a772e3 100644 --- a/drivers/staging/zcache/ramster/ramster.h +++ b/drivers/staging/zcache/ramster/ramster.h @@ -147,7 +147,7 @@ extern int r2net_register_handlers(void); extern int r2net_remote_target_node_set(int); extern int ramster_remotify_pageframe(bool); -extern void ramster_init(bool, bool, bool); +extern void ramster_init(bool, bool, bool, bool); extern void ramster_register_pamops(struct tmem_pamops *); extern int ramster_localify(int, struct tmem_oid *oidp, uint32_t, char *, unsigned int, void *); diff --git a/drivers/staging/zcache/ramster/ramster_nodemanager.h b/drivers/staging/zcache/ramster/ramster_nodemanager.h index 49f879d943ab..dbaae34ea613 100644 --- a/drivers/staging/zcache/ramster/ramster_nodemanager.h +++ b/drivers/staging/zcache/ramster/ramster_nodemanager.h @@ -36,4 +36,6 @@ /* host name, group name, cluster name all 64 bytes */ #define R2NM_MAX_NAME_LEN 64 /* __NEW_UTS_LEN */ +extern int r2nm_init(void); + #endif /* _RAMSTER_NODEMANAGER_H */ diff --git a/drivers/staging/zcache/tmem.c b/drivers/staging/zcache/tmem.c index a2b7e03b6062..d7e51e4152eb 100644 --- a/drivers/staging/zcache/tmem.c +++ b/drivers/staging/zcache/tmem.c @@ -35,7 +35,8 @@ #include <linux/list.h> #include <linux/spinlock.h> #include <linux/atomic.h> -#ifdef CONFIG_RAMSTER +#include <linux/export.h> +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) #include <linux/delay.h> #endif @@ -641,6 +642,7 @@ void *tmem_localify_get_pampd(struct tmem_pool *pool, struct tmem_oid *oidp, /* note, hashbucket remains locked */ return pampd; } +EXPORT_SYMBOL_GPL(tmem_localify_get_pampd); void tmem_localify_finish(struct tmem_obj *obj, uint32_t index, void *pampd, void *saved_hb, bool delete) @@ -658,6 +660,7 @@ void tmem_localify_finish(struct tmem_obj *obj, uint32_t index, } spin_unlock(&hb->lock); } +EXPORT_SYMBOL_GPL(tmem_localify_finish); /* * For ramster only. Helper function to support asynchronous tmem_get. @@ -719,6 +722,7 @@ out: spin_unlock(&hb->lock); return ret; } +EXPORT_SYMBOL_GPL(tmem_replace); #endif /* diff --git a/drivers/staging/zcache/tmem.h b/drivers/staging/zcache/tmem.h index adbe5a8f28aa..d128ce290f1f 100644 --- a/drivers/staging/zcache/tmem.h +++ b/drivers/staging/zcache/tmem.h @@ -126,7 +126,7 @@ static inline unsigned tmem_oid_hash(struct tmem_oid *oidp) TMEM_HASH_BUCKET_BITS); } -#ifdef CONFIG_RAMSTER +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) struct tmem_xhandle { uint8_t client_id; uint8_t xh_data_cksum; @@ -171,7 +171,7 @@ struct tmem_obj { unsigned int objnode_tree_height; unsigned long objnode_count; long pampd_count; -#ifdef CONFIG_RAMSTER +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) /* * for current design of ramster, all pages belonging to * an object reside on the same remotenode and extra is @@ -215,7 +215,7 @@ struct tmem_pamops { uint32_t); void (*free)(void *, struct tmem_pool *, struct tmem_oid *, uint32_t, bool); -#ifdef CONFIG_RAMSTER +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) void (*new_obj)(struct tmem_obj *); void (*free_obj)(struct tmem_pool *, struct tmem_obj *, bool); void *(*repatriate_preload)(void *, struct tmem_pool *, @@ -247,7 +247,7 @@ extern int tmem_flush_page(struct tmem_pool *, struct tmem_oid *, extern int tmem_flush_object(struct tmem_pool *, struct tmem_oid *); extern int tmem_destroy_pool(struct tmem_pool *); extern void tmem_new_pool(struct tmem_pool *, uint32_t); -#ifdef CONFIG_RAMSTER +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) extern int tmem_replace(struct tmem_pool *, struct tmem_oid *, uint32_t index, void *); extern void *tmem_localify_get_pampd(struct tmem_pool *, struct tmem_oid *, diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c index e23d814b5392..522cb8e55142 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -37,8 +37,10 @@ #include "debug.h" #ifdef CONFIG_RAMSTER static bool ramster_enabled __read_mostly; +static int disable_frontswap_selfshrink; #else #define ramster_enabled false +#define disable_frontswap_selfshrink 0 #endif #ifndef __PG_WAS_ACTIVE @@ -81,8 +83,12 @@ static char *namestr __read_mostly = "zcache"; (__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC) /* crypto API for zcache */ +#ifdef CONFIG_ZCACHE_MODULE +static char *zcache_comp_name = "lzo"; +#else #define ZCACHE_COMP_NAME_SZ CRYPTO_MAX_ALG_NAME static char zcache_comp_name[ZCACHE_COMP_NAME_SZ] __read_mostly; +#endif static struct crypto_comp * __percpu *zcache_comp_pcpu_tfms __read_mostly; enum comp_op { @@ -1576,9 +1582,9 @@ static struct cleancache_ops zcache_cleancache_ops = { .init_fs = zcache_cleancache_init_fs }; -struct cleancache_ops zcache_cleancache_register_ops(void) +struct cleancache_ops *zcache_cleancache_register_ops(void) { - struct cleancache_ops old_ops = + struct cleancache_ops *old_ops = cleancache_register_ops(&zcache_cleancache_ops); return old_ops; @@ -1707,9 +1713,9 @@ static struct frontswap_ops zcache_frontswap_ops = { .init = zcache_frontswap_init }; -struct frontswap_ops zcache_frontswap_register_ops(void) +struct frontswap_ops *zcache_frontswap_register_ops(void) { - struct frontswap_ops old_ops = + struct frontswap_ops *old_ops = frontswap_register_ops(&zcache_frontswap_ops); return old_ops; @@ -1721,6 +1727,7 @@ struct frontswap_ops zcache_frontswap_register_ops(void) * OR NOTHING HAPPENS! */ +#ifndef CONFIG_ZCACHE_MODULE static int __init enable_zcache(char *s) { zcache_enabled = true; @@ -1787,18 +1794,27 @@ static int __init enable_zcache_compressor(char *s) return 1; } __setup("zcache=", enable_zcache_compressor); +#endif -static int __init zcache_comp_init(void) +static int zcache_comp_init(void) { int ret = 0; /* check crypto algorithm */ +#ifdef CONFIG_ZCACHE_MODULE + ret = crypto_has_comp(zcache_comp_name, 0, 0); + if (!ret) { + ret = -1; + goto out; + } +#else if (*zcache_comp_name != '\0') { ret = crypto_has_comp(zcache_comp_name, 0, 0); if (!ret) pr_info("zcache: %s not supported\n", zcache_comp_name); + goto out; } if (!ret) strcpy(zcache_comp_name, "lzo"); @@ -1807,6 +1823,7 @@ static int __init zcache_comp_init(void) ret = 1; goto out; } +#endif pr_info("zcache: using %s compressor\n", zcache_comp_name); /* alloc percpu transforms */ @@ -1818,10 +1835,13 @@ out: return ret; } -static int __init zcache_init(void) +static int zcache_init(void) { int ret = 0; +#ifdef CONFIG_ZCACHE_MODULE + zcache_enabled = 1; +#endif if (ramster_enabled) { namestr = "ramster"; ramster_register_pamops(&zcache_pamops); @@ -1860,7 +1880,7 @@ static int __init zcache_init(void) } zbud_init(); if (zcache_enabled && !disable_cleancache) { - struct cleancache_ops old_ops; + struct cleancache_ops *old_ops; register_shrinker(&zcache_shrinker); old_ops = zcache_cleancache_register_ops(); @@ -1870,11 +1890,11 @@ static int __init zcache_init(void) pr_info("%s: cleancache: ignorenonactive = %d\n", namestr, !disable_cleancache_ignore_nonactive); #endif - if (old_ops.init_fs != NULL) + if (old_ops != NULL) pr_warn("%s: cleancache_ops overridden\n", namestr); } if (zcache_enabled && !disable_frontswap) { - struct frontswap_ops old_ops; + struct frontswap_ops *old_ops; old_ops = zcache_frontswap_register_ops(); if (frontswap_has_exclusive_gets) @@ -1886,14 +1906,36 @@ static int __init zcache_init(void) namestr, frontswap_has_exclusive_gets, !disable_frontswap_ignore_nonactive); #endif - if (old_ops.init != NULL) + if (IS_ERR(old_ops) || old_ops) { + if (IS_ERR(old_ops)) + return PTR_RET(old_ops); pr_warn("%s: frontswap_ops overridden\n", namestr); + } } if (ramster_enabled) ramster_init(!disable_cleancache, !disable_frontswap, - frontswap_has_exclusive_gets); + frontswap_has_exclusive_gets, + !disable_frontswap_selfshrink); out: return ret; } +#ifdef CONFIG_ZCACHE_MODULE +#ifdef CONFIG_RAMSTER +module_param(ramster_enabled, int, S_IRUGO); +module_param(disable_frontswap_selfshrink, int, S_IRUGO); +#endif +module_param(disable_cleancache, int, S_IRUGO); +module_param(disable_frontswap, int, S_IRUGO); +#ifdef FRONTSWAP_HAS_EXCLUSIVE_GETS +module_param(frontswap_has_exclusive_gets, bool, S_IRUGO); +#endif +module_param(disable_frontswap_ignore_nonactive, int, S_IRUGO); +module_param(zcache_comp_name, charp, S_IRUGO); +module_init(zcache_init); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Dan Magenheimer <dan.magenheimer@oracle.com>"); +MODULE_DESCRIPTION("In-kernel compression of cleancache/frontswap pages"); +#else late_initcall(zcache_init); +#endif diff --git a/drivers/staging/zcache/zcache.h b/drivers/staging/zcache/zcache.h index 81722b33b087..849120095e79 100644 --- a/drivers/staging/zcache/zcache.h +++ b/drivers/staging/zcache/zcache.h @@ -39,7 +39,7 @@ extern int zcache_flush_page(int, int, struct tmem_oid *, uint32_t); extern int zcache_flush_object(int, int, struct tmem_oid *); extern void zcache_decompress_to_page(char *, unsigned int, struct page *); -#ifdef CONFIG_RAMSTER +#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE) extern void *zcache_pampd_create(char *, unsigned int, bool, int, struct tmem_handle *); int zcache_autocreate_pool(unsigned int cli_id, unsigned int pool_id, bool eph); |