From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/fs/xfs/xfs_stats.c | 93 +++++++++++++++++++++++------------------------ 1 file changed, 45 insertions(+), 48 deletions(-) (limited to 'kernel/fs/xfs/xfs_stats.c') diff --git a/kernel/fs/xfs/xfs_stats.c b/kernel/fs/xfs/xfs_stats.c index f2240383d..8686df6c7 100644 --- a/kernel/fs/xfs/xfs_stats.c +++ b/kernel/fs/xfs/xfs_stats.c @@ -18,20 +18,21 @@ #include "xfs.h" #include -DEFINE_PER_CPU(struct xfsstats, xfsstats); +struct xstats xfsstats; -static int counter_val(int idx) +static int counter_val(struct xfsstats __percpu *stats, int idx) { int val = 0, cpu; for_each_possible_cpu(cpu) - val += *(((__u32 *)&per_cpu(xfsstats, cpu) + idx)); + val += *(((__u32 *)per_cpu_ptr(stats, cpu) + idx)); return val; } -static int xfs_stat_proc_show(struct seq_file *m, void *v) +int xfs_stats_format(struct xfsstats __percpu *stats, char *buf) { int i, j; + int len = 0; __uint64_t xs_xstrat_bytes = 0; __uint64_t xs_write_bytes = 0; __uint64_t xs_read_bytes = 0; @@ -65,54 +66,59 @@ static int xfs_stat_proc_show(struct seq_file *m, void *v) }; /* Loop over all stats groups */ + for (i = j = 0; i < ARRAY_SIZE(xstats); i++) { - seq_printf(m, "%s", xstats[i].desc); + len += snprintf(buf + len, PATH_MAX - len, "%s", + xstats[i].desc); /* inner loop does each group */ for (; j < xstats[i].endpoint; j++) - seq_printf(m, " %u", counter_val(j)); - seq_putc(m, '\n'); + len += snprintf(buf + len, PATH_MAX - len, " %u", + counter_val(stats, j)); + len += snprintf(buf + len, PATH_MAX - len, "\n"); } /* extra precision counters */ for_each_possible_cpu(i) { - xs_xstrat_bytes += per_cpu(xfsstats, i).xs_xstrat_bytes; - xs_write_bytes += per_cpu(xfsstats, i).xs_write_bytes; - xs_read_bytes += per_cpu(xfsstats, i).xs_read_bytes; + xs_xstrat_bytes += per_cpu_ptr(stats, i)->xs_xstrat_bytes; + xs_write_bytes += per_cpu_ptr(stats, i)->xs_write_bytes; + xs_read_bytes += per_cpu_ptr(stats, i)->xs_read_bytes; } - seq_printf(m, "xpc %Lu %Lu %Lu\n", + len += snprintf(buf + len, PATH_MAX-len, "xpc %Lu %Lu %Lu\n", xs_xstrat_bytes, xs_write_bytes, xs_read_bytes); - seq_printf(m, "debug %u\n", + len += snprintf(buf + len, PATH_MAX-len, "debug %u\n", #if defined(DEBUG) 1); #else 0); #endif - return 0; + + return len; } -static int xfs_stat_proc_open(struct inode *inode, struct file *file) +void xfs_stats_clearall(struct xfsstats __percpu *stats) { - return single_open(file, xfs_stat_proc_show, NULL); + int c; + __uint32_t vn_active; + + xfs_notice(NULL, "Clearing xfsstats"); + for_each_possible_cpu(c) { + preempt_disable(); + /* save vn_active, it's a universal truth! */ + vn_active = per_cpu_ptr(stats, c)->vn_active; + memset(per_cpu_ptr(stats, c), 0, sizeof(*stats)); + per_cpu_ptr(stats, c)->vn_active = vn_active; + preempt_enable(); + } } -static const struct file_operations xfs_stat_proc_fops = { - .owner = THIS_MODULE, - .open = xfs_stat_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - /* legacy quota interfaces */ #ifdef CONFIG_XFS_QUOTA static int xqm_proc_show(struct seq_file *m, void *v) { /* maximum; incore; ratio free to inuse; freelist */ seq_printf(m, "%d\t%d\t%d\t%u\n", - 0, - counter_val(XFSSTAT_END_XQMSTAT), - 0, - counter_val(XFSSTAT_END_XQMSTAT + 1)); + 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT), + 0, counter_val(xfsstats.xs_stats, XFSSTAT_END_XQMSTAT + 1)); return 0; } @@ -136,7 +142,7 @@ static int xqmstat_proc_show(struct seq_file *m, void *v) seq_printf(m, "qm"); for (j = XFSSTAT_END_IBT_V2; j < XFSSTAT_END_XQMSTAT; j++) - seq_printf(m, " %u", counter_val(j)); + seq_printf(m, " %u", counter_val(xfsstats.xs_stats, j)); seq_putc(m, '\n'); return 0; } @@ -155,44 +161,35 @@ static const struct file_operations xqmstat_proc_fops = { }; #endif /* CONFIG_XFS_QUOTA */ +#ifdef CONFIG_PROC_FS int xfs_init_procfs(void) { if (!proc_mkdir("fs/xfs", NULL)) + return -ENOMEM; + + if (!proc_symlink("fs/xfs/stat", NULL, + "/sys/fs/xfs/stats/stats")) goto out; - if (!proc_create("fs/xfs/stat", 0, NULL, - &xfs_stat_proc_fops)) - goto out_remove_xfs_dir; #ifdef CONFIG_XFS_QUOTA if (!proc_create("fs/xfs/xqmstat", 0, NULL, &xqmstat_proc_fops)) - goto out_remove_stat_file; + goto out; if (!proc_create("fs/xfs/xqm", 0, NULL, &xqm_proc_fops)) - goto out_remove_xqmstat_file; + goto out; #endif return 0; -#ifdef CONFIG_XFS_QUOTA - out_remove_xqmstat_file: - remove_proc_entry("fs/xfs/xqmstat", NULL); - out_remove_stat_file: - remove_proc_entry("fs/xfs/stat", NULL); -#endif - out_remove_xfs_dir: - remove_proc_entry("fs/xfs", NULL); - out: +out: + remove_proc_subtree("fs/xfs", NULL); return -ENOMEM; } void xfs_cleanup_procfs(void) { -#ifdef CONFIG_XFS_QUOTA - remove_proc_entry("fs/xfs/xqm", NULL); - remove_proc_entry("fs/xfs/xqmstat", NULL); -#endif - remove_proc_entry("fs/xfs/stat", NULL); - remove_proc_entry("fs/xfs", NULL); + remove_proc_subtree("fs/xfs", NULL); } +#endif /* CONFIG_PROC_FS */ -- cgit 1.2.3-korg