X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=fs%2Fgfs2%2Fglock.c;h=dab2526071cc7b53bc18a9203deea61ab78aaae3;hb=6a76a6992341faab0ef31e7d97000e0cf336d0ba;hp=351a3e797789a802669a084d3eef1c771583c6e3;hpb=75d7b398b74f86244fbb46ea9005438ae0aa33c8;p=~andy%2Flinux diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 351a3e79778..dab2526071c 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -29,6 +29,7 @@ #include #include #include +#include #include "gfs2.h" #include "incore.h" @@ -543,6 +544,11 @@ __acquires(&gl->gl_spin) do_error(gl, 0); /* Fail queued try locks */ } gl->gl_req = target; + set_bit(GLF_BLOCKING, &gl->gl_flags); + if ((gl->gl_req == LM_ST_UNLOCKED) || + (gl->gl_state == LM_ST_EXCLUSIVE) || + (lck_flags & (LM_FLAG_TRY|LM_FLAG_TRY_1CB))) + clear_bit(GLF_BLOCKING, &gl->gl_flags); spin_unlock(&gl->gl_spin); if (glops->go_xmote_th) glops->go_xmote_th(gl); @@ -744,6 +750,7 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, return -ENOMEM; atomic_inc(&sdp->sd_glock_disposal); + gl->gl_sbd = sdp; gl->gl_flags = 0; gl->gl_name = name; atomic_set(&gl->gl_ref, 1); @@ -752,12 +759,17 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, gl->gl_demote_state = LM_ST_EXCLUSIVE; gl->gl_hash = hash; gl->gl_ops = glops; - snprintf(gl->gl_strname, GDLM_STRNAME_BYTES, "%8x%16llx", name.ln_type, (unsigned long long)number); + gl->gl_dstamp = ktime_set(0, 0); + preempt_disable(); + /* We use the global stats to estimate the initial per-glock stats */ + gl->gl_stats = this_cpu_ptr(sdp->sd_lkstats)->lkstats[glops->go_type]; + preempt_enable(); + gl->gl_stats.stats[GFS2_LKS_DCOUNT] = 0; + gl->gl_stats.stats[GFS2_LKS_QCOUNT] = 0; memset(&gl->gl_lksb, 0, sizeof(struct dlm_lksb)); gl->gl_lksb.sb_lvbptr = gl->gl_lvb; gl->gl_tchange = jiffies; gl->gl_object = NULL; - gl->gl_sbd = sdp; gl->gl_hold_time = GL_GLOCK_DFT_HOLD; INIT_DELAYED_WORK(&gl->gl_work, glock_work_func); INIT_WORK(&gl->gl_delete, delete_work_func); @@ -999,6 +1011,8 @@ fail: } set_bit(GLF_QUEUED, &gl->gl_flags); trace_gfs2_glock_queue(gh, 1); + gfs2_glstats_inc(gl, GFS2_LKS_QCOUNT); + gfs2_sbstats_inc(gl, GFS2_LKS_QCOUNT); if (likely(insert_pt == NULL)) { list_add_tail(&gh->gh_list, &gl->gl_holders); if (unlikely(gh->gh_flags & LM_FLAG_PRIORITY)) @@ -1658,6 +1672,8 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl) *p++ = 'L'; if (gl->gl_object) *p++ = 'o'; + if (test_bit(GLF_BLOCKING, gflags)) + *p++ = 'b'; *p = 0; return buf; } @@ -1714,8 +1730,78 @@ out: return error; } +static int gfs2_glstats_seq_show(struct seq_file *seq, void *iter_ptr) +{ + struct gfs2_glock *gl = iter_ptr; + + seq_printf(seq, "G: n:%u/%llx rtt:%lld/%lld rttb:%lld/%lld irt:%lld/%lld dcnt: %lld qcnt: %lld\n", + gl->gl_name.ln_type, + (unsigned long long)gl->gl_name.ln_number, + (long long)gl->gl_stats.stats[GFS2_LKS_SRTT], + (long long)gl->gl_stats.stats[GFS2_LKS_SRTTVAR], + (long long)gl->gl_stats.stats[GFS2_LKS_SRTTB], + (long long)gl->gl_stats.stats[GFS2_LKS_SRTTVARB], + (long long)gl->gl_stats.stats[GFS2_LKS_SIRT], + (long long)gl->gl_stats.stats[GFS2_LKS_SIRTVAR], + (long long)gl->gl_stats.stats[GFS2_LKS_DCOUNT], + (long long)gl->gl_stats.stats[GFS2_LKS_QCOUNT]); + return 0; +} + +static const char *gfs2_gltype[] = { + "type", + "reserved", + "nondisk", + "inode", + "rgrp", + "meta", + "iopen", + "flock", + "plock", + "quota", + "journal", +}; + +static const char *gfs2_stype[] = { + [GFS2_LKS_SRTT] = "srtt", + [GFS2_LKS_SRTTVAR] = "srttvar", + [GFS2_LKS_SRTTB] = "srttb", + [GFS2_LKS_SRTTVARB] = "srttvarb", + [GFS2_LKS_SIRT] = "sirt", + [GFS2_LKS_SIRTVAR] = "sirtvar", + [GFS2_LKS_DCOUNT] = "dlm", + [GFS2_LKS_QCOUNT] = "queue", +}; + +#define GFS2_NR_SBSTATS (ARRAY_SIZE(gfs2_gltype) * ARRAY_SIZE(gfs2_stype)) + +static int gfs2_sbstats_seq_show(struct seq_file *seq, void *iter_ptr) +{ + struct gfs2_glock_iter *gi = seq->private; + struct gfs2_sbd *sdp = gi->sdp; + unsigned index = gi->hash >> 3; + unsigned subindex = gi->hash & 0x07; + s64 value; + int i; + + if (index == 0 && subindex != 0) + return 0; + seq_printf(seq, "%-10s %8s:", gfs2_gltype[index], + (index == 0) ? "cpu": gfs2_stype[subindex]); + for_each_possible_cpu(i) { + const struct gfs2_pcpu_lkstats *lkstats = per_cpu_ptr(sdp->sd_lkstats, i); + if (index == 0) { + value = i; + } else { + value = lkstats->lkstats[index - 1].stats[subindex]; + } + seq_printf(seq, " %15lld", (long long)value); + } + seq_putc(seq, '\n'); + return 0; +} int __init gfs2_glock_init(void) { @@ -1828,6 +1914,35 @@ static int gfs2_glock_seq_show(struct seq_file *seq, void *iter_ptr) return dump_glock(seq, iter_ptr); } +static void *gfs2_sbstats_seq_start(struct seq_file *seq, loff_t *pos) +{ + struct gfs2_glock_iter *gi = seq->private; + + gi->hash = *pos; + if (*pos >= GFS2_NR_SBSTATS) + return NULL; + preempt_disable(); + return SEQ_START_TOKEN; +} + +static void *gfs2_sbstats_seq_next(struct seq_file *seq, void *iter_ptr, + loff_t *pos) +{ + struct gfs2_glock_iter *gi = seq->private; + (*pos)++; + gi->hash++; + if (gi->hash >= GFS2_NR_SBSTATS) { + preempt_enable(); + return NULL; + } + return SEQ_START_TOKEN; +} + +static void gfs2_sbstats_seq_stop(struct seq_file *seq, void *iter_ptr) +{ + preempt_enable(); +} + static const struct seq_operations gfs2_glock_seq_ops = { .start = gfs2_glock_seq_start, .next = gfs2_glock_seq_next, @@ -1835,7 +1950,21 @@ static const struct seq_operations gfs2_glock_seq_ops = { .show = gfs2_glock_seq_show, }; -static int gfs2_debugfs_open(struct inode *inode, struct file *file) +static const struct seq_operations gfs2_glstats_seq_ops = { + .start = gfs2_glock_seq_start, + .next = gfs2_glock_seq_next, + .stop = gfs2_glock_seq_stop, + .show = gfs2_glstats_seq_show, +}; + +static const struct seq_operations gfs2_sbstats_seq_ops = { + .start = gfs2_sbstats_seq_start, + .next = gfs2_sbstats_seq_next, + .stop = gfs2_sbstats_seq_stop, + .show = gfs2_sbstats_seq_show, +}; + +static int gfs2_glocks_open(struct inode *inode, struct file *file) { int ret = seq_open_private(file, &gfs2_glock_seq_ops, sizeof(struct gfs2_glock_iter)); @@ -1847,9 +1976,49 @@ static int gfs2_debugfs_open(struct inode *inode, struct file *file) return ret; } -static const struct file_operations gfs2_debug_fops = { +static int gfs2_glstats_open(struct inode *inode, struct file *file) +{ + int ret = seq_open_private(file, &gfs2_glstats_seq_ops, + sizeof(struct gfs2_glock_iter)); + if (ret == 0) { + struct seq_file *seq = file->private_data; + struct gfs2_glock_iter *gi = seq->private; + gi->sdp = inode->i_private; + } + return ret; +} + +static int gfs2_sbstats_open(struct inode *inode, struct file *file) +{ + int ret = seq_open_private(file, &gfs2_sbstats_seq_ops, + sizeof(struct gfs2_glock_iter)); + if (ret == 0) { + struct seq_file *seq = file->private_data; + struct gfs2_glock_iter *gi = seq->private; + gi->sdp = inode->i_private; + } + return ret; +} + +static const struct file_operations gfs2_glocks_fops = { + .owner = THIS_MODULE, + .open = gfs2_glocks_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static const struct file_operations gfs2_glstats_fops = { .owner = THIS_MODULE, - .open = gfs2_debugfs_open, + .open = gfs2_glstats_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static const struct file_operations gfs2_sbstats_fops = { + .owner = THIS_MODULE, + .open = gfs2_sbstats_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_private, @@ -1863,20 +2032,45 @@ int gfs2_create_debugfs_file(struct gfs2_sbd *sdp) sdp->debugfs_dentry_glocks = debugfs_create_file("glocks", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp, - &gfs2_debug_fops); + &gfs2_glocks_fops); if (!sdp->debugfs_dentry_glocks) - return -ENOMEM; + goto fail; + + sdp->debugfs_dentry_glstats = debugfs_create_file("glstats", + S_IFREG | S_IRUGO, + sdp->debugfs_dir, sdp, + &gfs2_glstats_fops); + if (!sdp->debugfs_dentry_glstats) + goto fail; + + sdp->debugfs_dentry_sbstats = debugfs_create_file("sbstats", + S_IFREG | S_IRUGO, + sdp->debugfs_dir, sdp, + &gfs2_sbstats_fops); + if (!sdp->debugfs_dentry_sbstats) + goto fail; return 0; +fail: + gfs2_delete_debugfs_file(sdp); + return -ENOMEM; } void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp) { - if (sdp && sdp->debugfs_dir) { + if (sdp->debugfs_dir) { if (sdp->debugfs_dentry_glocks) { debugfs_remove(sdp->debugfs_dentry_glocks); sdp->debugfs_dentry_glocks = NULL; } + if (sdp->debugfs_dentry_glstats) { + debugfs_remove(sdp->debugfs_dentry_glstats); + sdp->debugfs_dentry_glstats = NULL; + } + if (sdp->debugfs_dentry_sbstats) { + debugfs_remove(sdp->debugfs_dentry_sbstats); + sdp->debugfs_dentry_sbstats = NULL; + } debugfs_remove(sdp->debugfs_dir); sdp->debugfs_dir = NULL; }