diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfssvc.c | 13 | ||||
| -rw-r--r-- | fs/nfsd/vfs.c | 149 | ||||
| -rw-r--r-- | fs/nfsd/vfs.h | 6 |
3 files changed, 1 insertions, 167 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index a6b1eab7b722..d02712ca2685 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -317,22 +317,12 @@ static int nfsd_startup_generic(int nrservs) ret = nfsd_file_cache_init(); if (ret) goto dec_users; - /* - * Readahead param cache - will no-op if it already exists. - * (Note therefore results will be suboptimal if number of - * threads is modified after nfsd start.) - */ - ret = nfsd_racache_init(2*nrservs); - if (ret) - goto out_file_cache; ret = nfs4_state_start(); if (ret) - goto out_racache; + goto out_file_cache; return 0; -out_racache: - nfsd_racache_shutdown(); out_file_cache: nfsd_file_cache_shutdown(); dec_users: @@ -347,7 +337,6 @@ static void nfsd_shutdown_generic(void) nfs4_state_shutdown(); nfsd_file_cache_shutdown(); - nfsd_racache_shutdown(); } static bool nfsd_needs_lockd(struct nfsd_net *nn) diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index ec254bff1893..8e2c8f36eba3 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -49,34 +49,6 @@ #define NFSDDBG_FACILITY NFSDDBG_FILEOP - -/* - * This is a cache of readahead params that help us choose the proper - * readahead strategy. Initially, we set all readahead parameters to 0 - * and let the VFS handle things. - * If you increase the number of cached files very much, you'll need to - * add a hash table here. - */ -struct raparms { - struct raparms *p_next; - unsigned int p_count; - ino_t p_ino; - dev_t p_dev; - int p_set; - struct file_ra_state p_ra; - unsigned int p_hindex; -}; - -struct raparm_hbucket { - struct raparms *pb_head; - spinlock_t pb_lock; -} ____cacheline_aligned_in_smp; - -#define RAPARM_HASH_BITS 4 -#define RAPARM_HASH_SIZE (1<<RAPARM_HASH_BITS) -#define RAPARM_HASH_MASK (RAPARM_HASH_SIZE-1) -static struct raparm_hbucket raparm_hash[RAPARM_HASH_SIZE]; - /* * Called from nfsd_lookup and encode_dirent. Check if we have crossed * a mount point. @@ -822,67 +794,6 @@ nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, umode_t type, return err; } - - -struct raparms * -nfsd_init_raparms(struct file *file) -{ - struct inode *inode = file_inode(file); - dev_t dev = inode->i_sb->s_dev; - ino_t ino = inode->i_ino; - struct raparms *ra, **rap, **frap = NULL; - int depth = 0; - unsigned int hash; - struct raparm_hbucket *rab; - - hash = jhash_2words(dev, ino, 0xfeedbeef) & RAPARM_HASH_MASK; - rab = &raparm_hash[hash]; - - spin_lock(&rab->pb_lock); - for (rap = &rab->pb_head; (ra = *rap); rap = &ra->p_next) { - if (ra->p_ino == ino && ra->p_dev == dev) - goto found; - depth++; - if (ra->p_count == 0) - frap = rap; - } - depth = nfsdstats.ra_size; - if (!frap) { - spin_unlock(&rab->pb_lock); - return NULL; - } - rap = frap; - ra = *frap; - ra->p_dev = dev; - ra->p_ino = ino; - ra->p_set = 0; - ra->p_hindex = hash; -found: - if (rap != &rab->pb_head) { - *rap = ra->p_next; - ra->p_next = rab->pb_head; - rab->pb_head = ra; - } - ra->p_count++; - nfsdstats.ra_depth[depth*10/nfsdstats.ra_size]++; - spin_unlock(&rab->pb_lock); - - if (ra->p_set) - file->f_ra = ra->p_ra; - return ra; -} - -void nfsd_put_raparams(struct file *file, struct raparms *ra) -{ - struct raparm_hbucket *rab = &raparm_hash[ra->p_hindex]; - - spin_lock(&rab->pb_lock); - ra->p_ra = file->f_ra; - ra->p_set = 1; - ra->p_count--; - spin_unlock(&rab->pb_lock); -} - /* * Grab and keep cached pages associated with a file in the svc_rqst * so that they can be passed to the network sendmsg/sendpage routines @@ -2094,63 +2005,3 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp, return err? nfserrno(err) : 0; } - -void -nfsd_racache_shutdown(void) -{ - struct raparms *raparm, *last_raparm; - unsigned int i; - - dprintk("nfsd: freeing readahead buffers.\n"); - - for (i = 0; i < RAPARM_HASH_SIZE; i++) { - raparm = raparm_hash[i].pb_head; - while(raparm) { - last_raparm = raparm; - raparm = raparm->p_next; - kfree(last_raparm); - } - raparm_hash[i].pb_head = NULL; - } -} -/* - * Initialize readahead param cache - */ -int -nfsd_racache_init(int cache_size) -{ - int i; - int j = 0; - int nperbucket; - struct raparms **raparm = NULL; - - - if (raparm_hash[0].pb_head) - return 0; - nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE); - nperbucket = max(2, nperbucket); - cache_size = nperbucket * RAPARM_HASH_SIZE; - - dprintk("nfsd: allocating %d readahead buffers.\n", cache_size); - - for (i = 0; i < RAPARM_HASH_SIZE; i++) { - spin_lock_init(&raparm_hash[i].pb_lock); - - raparm = &raparm_hash[i].pb_head; - for (j = 0; j < nperbucket; j++) { - *raparm = kzalloc(sizeof(struct raparms), GFP_KERNEL); - if (!*raparm) - goto out_nomem; - raparm = &(*raparm)->p_next; - } - *raparm = NULL; - } - - nfsdstats.ra_size = cache_size; - return 0; - -out_nomem: - dprintk("nfsd: kmalloc failed, freeing readahead buffers\n"); - nfsd_racache_shutdown(); - return -ENOMEM; -} diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index 31fdae34e028..e0f7792165a6 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -40,8 +40,6 @@ typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); /* nfsd/vfs.c */ -int nfsd_racache_init(int); -void nfsd_racache_shutdown(void); int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, struct svc_export **expp); __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, @@ -80,7 +78,6 @@ __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, int, struct file **); __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, int, struct file **); -struct raparms; __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, unsigned long *count); @@ -118,9 +115,6 @@ __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, struct dentry *, int); -struct raparms *nfsd_init_raparms(struct file *file); -void nfsd_put_raparams(struct file *file, struct raparms *ra); - static inline int fh_want_write(struct svc_fh *fh) { int ret; |
