From: Amir Shehata <amir.shehata@xxxxxxxxx> On systems with large number of NUMA nodes and cores it is easy to incorrectly configure their use with Lustre. Provide debugfs files which can help track down any issues. Signed-off-by: Amir Shehata <amir.shehata@xxxxxxxxx> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7734 Reviewed-on: http://review.whamcloud.com/18916 Reviewed-by: Olaf Weber <olaf@xxxxxxx> Reviewed-by: Doug Oucharek <dougso@xxxxxx> Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx> --- drivers/staging/lustre/lnet/libcfs/module.c | 53 +++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/staging/lustre/lnet/libcfs/module.c b/drivers/staging/lustre/lnet/libcfs/module.c index a03f924..95af000 100644 --- a/drivers/staging/lustre/lnet/libcfs/module.c +++ b/drivers/staging/lustre/lnet/libcfs/module.c @@ -336,6 +336,53 @@ static int proc_cpt_table(struct ctl_table *table, int write, __proc_cpt_table); } +static int __proc_cpt_distance(void *data, int write, + loff_t pos, void __user *buffer, int nob) +{ + char *buf = NULL; + int len = 4096; + int rc = 0; + + if (write) + return -EPERM; + + LASSERT(cfs_cpt_table); + + while (1) { + buf = kzalloc(len, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + rc = cfs_cpt_distance_print(cfs_cpt_table, buf, len); + if (rc >= 0) + break; + + if (rc == -EFBIG) { + kfree(buf); + len <<= 1; + continue; + } + goto out; + } + + if (pos >= rc) { + rc = 0; + goto out; + } + + rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL); +out: + kfree(buf); + return rc; +} + +static int proc_cpt_distance(struct ctl_table *table, int write, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + return lprocfs_call_handler(table->data, write, ppos, buffer, lenp, + __proc_cpt_distance); +} + static struct ctl_table lnet_table[] = { { .procname = "debug", @@ -365,6 +412,12 @@ static int proc_cpt_table(struct ctl_table *table, int write, .proc_handler = &proc_cpt_table, }, { + .procname = "cpu_partition_distance", + .maxlen = 128, + .mode = 0444, + .proc_handler = &proc_cpt_distance, + }, + { .procname = "debug_log_upcall", .data = lnet_debug_log_upcall, .maxlen = sizeof(lnet_debug_log_upcall), -- 1.8.3.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
