From aab38b00ac19347bf982cf42c71aab14a9301dee Mon Sep 17 00:00:00 2001 From: Oleg Drokin Date: Thu, 21 May 2015 15:32:21 -0400 Subject: [PATCH] staging/lustre/osc: move suitable values from procfs to sysfs All single-value controls are moved from /proc/fs/lustre/osc/.../ to /sys/fs/lustre/osc/.../ Signed-off-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lustre/osc/lproc_osc.c | 371 ++++++++++-------- drivers/staging/lustre/sysfs-fs-lustre | 107 ++++- 2 files changed, 314 insertions(+), 164 deletions(-) diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c index 199913d7dddf..2f07ea5a736b 100644 --- a/drivers/staging/lustre/lustre/osc/lproc_osc.c +++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c @@ -42,25 +42,25 @@ #include #include "osc_internal.h" -static int osc_active_seq_show(struct seq_file *m, void *v) +static ssize_t active_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; - - LPROCFS_CLIMP_CHECK(dev); - seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive); - LPROCFS_CLIMP_EXIT(dev); + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); - return 0; + return sprintf(buf, "%d\n", !dev->u.cli.cl_import->imp_deactive); } -static ssize_t osc_active_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t active_store(struct kobject *kobj, struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *dev = ((struct seq_file *)file->private_data)->private; - int val, rc; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); + int rc; + unsigned long val; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtoul(buffer, 10, &val); if (rc) return rc; if (val < 0 || val > 1) @@ -70,41 +70,43 @@ static ssize_t osc_active_seq_write(struct file *file, if (dev->u.cli.cl_import->imp_deactive == val) rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val); else - CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", val); + CDEBUG(D_CONFIG, "activate %ld: ignoring repeat request\n", + val); return count; } -LPROC_SEQ_FOPS(osc_active); +LUSTRE_RW_ATTR(active); -static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v) +static ssize_t max_rpcs_in_flight_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; - client_obd_list_lock(&cli->cl_loi_list_lock); - seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight); - client_obd_list_unlock(&cli->cl_loi_list_lock); - - return 0; + return sprintf(buf, "%u\n", cli->cl_max_rpcs_in_flight); } -static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t max_rpcs_in_flight_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *dev = ((struct seq_file *)file->private_data)->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool; - int val, rc; + int rc; + unsigned long val; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtoul(buffer, 10, &val); if (rc) return rc; if (val < 1 || val > OSC_MAX_RIF_MAX) return -ERANGE; - LPROCFS_CLIMP_CHECK(dev); if (pool && val > cli->cl_max_rpcs_in_flight) pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight); @@ -112,14 +114,16 @@ static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file, cli->cl_max_rpcs_in_flight = val; client_obd_list_unlock(&cli->cl_loi_list_lock); - LPROCFS_CLIMP_EXIT(dev); return count; } -LPROC_SEQ_FOPS(osc_max_rpcs_in_flight); +LUSTRE_RW_ATTR(max_rpcs_in_flight); -static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v) +static ssize_t max_dirty_mb_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; long val; int mult; @@ -129,22 +133,26 @@ static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v) client_obd_list_unlock(&cli->cl_loi_list_lock); mult = 1 << 20; - return lprocfs_seq_read_frac_helper(m, val, mult); + return lprocfs_read_frac_helper(buf, PAGE_SIZE, val, mult); } -static ssize_t osc_max_dirty_mb_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t max_dirty_mb_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *dev = ((struct seq_file *)file->private_data)->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; - int pages_number, mult, rc; + int rc; + unsigned long pages_number; - mult = 1 << (20 - PAGE_CACHE_SHIFT); - rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + rc = kstrtoul(buffer, 10, &pages_number); if (rc) return rc; + pages_number *= 1 << (20 - PAGE_CACHE_SHIFT); /* MB -> pages */ + if (pages_number <= 0 || pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_SHIFT) || pages_number > totalram_pages / 4) /* 1/4 of RAM */ @@ -157,7 +165,7 @@ static ssize_t osc_max_dirty_mb_seq_write(struct file *file, return count; } -LPROC_SEQ_FOPS(osc_max_dirty_mb); +LUSTRE_RW_ATTR(max_dirty_mb); static int osc_cached_mb_seq_show(struct seq_file *m, void *v) { @@ -210,44 +218,51 @@ static ssize_t osc_cached_mb_seq_write(struct file *file, } LPROC_SEQ_FOPS(osc_cached_mb); -static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v) +static ssize_t cur_dirty_bytes_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; + int len; client_obd_list_lock(&cli->cl_loi_list_lock); - seq_printf(m, "%lu\n", cli->cl_dirty); + len = sprintf(buf, "%lu\n", cli->cl_dirty); client_obd_list_unlock(&cli->cl_loi_list_lock); - return 0; + return len; } -LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes); +LUSTRE_RO_ATTR(cur_dirty_bytes); -static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v) +static ssize_t cur_grant_bytes_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; + int len; client_obd_list_lock(&cli->cl_loi_list_lock); - seq_printf(m, "%lu\n", cli->cl_avail_grant); + len = sprintf(buf, "%lu\n", cli->cl_avail_grant); client_obd_list_unlock(&cli->cl_loi_list_lock); - return 0; + return len; } -static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t cur_grant_bytes_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &obd->u.cli; - int rc; - __u64 val; - - if (obd == NULL) - return 0; + int rc; + unsigned long long val; - rc = lprocfs_write_u64_helper(buffer, count, &val); + rc = kstrtoull(buffer, 10, &val); if (rc) return rc; @@ -255,54 +270,56 @@ static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, client_obd_list_lock(&cli->cl_loi_list_lock); if (val >= cli->cl_avail_grant) { client_obd_list_unlock(&cli->cl_loi_list_lock); - return 0; + return -EINVAL; } client_obd_list_unlock(&cli->cl_loi_list_lock); - LPROCFS_CLIMP_CHECK(obd); if (cli->cl_import->imp_state == LUSTRE_IMP_FULL) rc = osc_shrink_grant_to_target(cli, val); - LPROCFS_CLIMP_EXIT(obd); if (rc) return rc; return count; } -LPROC_SEQ_FOPS(osc_cur_grant_bytes); +LUSTRE_RW_ATTR(cur_grant_bytes); -static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v) +static ssize_t cur_lost_grant_bytes_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *dev = m->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; + int len; client_obd_list_lock(&cli->cl_loi_list_lock); - seq_printf(m, "%lu\n", cli->cl_lost_grant); + len = sprintf(buf, "%lu\n", cli->cl_lost_grant); client_obd_list_unlock(&cli->cl_loi_list_lock); - return 0; + return len; } -LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes); +LUSTRE_RO_ATTR(cur_lost_grant_bytes); -static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v) +static ssize_t grant_shrink_interval_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); - if (obd == NULL) - return 0; - seq_printf(m, "%d\n", obd->u.cli.cl_grant_shrink_interval); - return 0; + return sprintf(buf, "%d\n", obd->u.cli.cl_grant_shrink_interval); } -static ssize_t osc_grant_shrink_interval_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t grant_shrink_interval_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; - int val, rc; - - if (obd == NULL) - return 0; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); + int rc; + unsigned long val; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtoul(buffer, 10, &val); if (rc) return rc; @@ -313,30 +330,29 @@ static ssize_t osc_grant_shrink_interval_seq_write(struct file *file, return count; } -LPROC_SEQ_FOPS(osc_grant_shrink_interval); +LUSTRE_RW_ATTR(grant_shrink_interval); -static int osc_checksum_seq_show(struct seq_file *m, void *v) +static ssize_t checksums_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; - - if (obd == NULL) - return 0; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); - seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 0); - return 0; + return sprintf(buf, "%d\n", obd->u.cli.cl_checksum ? 1 : 0); } -static ssize_t osc_checksum_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t checksums_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; - int val, rc; - - if (obd == NULL) - return 0; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); + int rc; + unsigned long val; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtoul(buffer, 10, &val); if (rc) return rc; @@ -344,7 +360,7 @@ static ssize_t osc_checksum_seq_write(struct file *file, return count; } -LPROC_SEQ_FOPS(osc_checksum); +LUSTRE_RW_ATTR(checksums); static int osc_checksum_type_seq_show(struct seq_file *m, void *v) { @@ -400,22 +416,27 @@ static ssize_t osc_checksum_type_seq_write(struct file *file, } LPROC_SEQ_FOPS(osc_checksum_type); -static int osc_resend_count_seq_show(struct seq_file *m, void *v) +static ssize_t resend_count_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); - seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends)); - return 0; + return sprintf(buf, "%u\n", atomic_read(&obd->u.cli.cl_resends)); } -static ssize_t osc_resend_count_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t resend_count_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; - int val, rc; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); + int rc; + unsigned long val; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtoul(buffer, 10, &val); if (rc) return rc; @@ -426,75 +447,94 @@ static ssize_t osc_resend_count_seq_write(struct file *file, return count; } -LPROC_SEQ_FOPS(osc_resend_count); +LUSTRE_RW_ATTR(resend_count); -static int osc_contention_seconds_seq_show(struct seq_file *m, void *v) +static ssize_t contention_seconds_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); struct osc_device *od = obd2osc_dev(obd); - seq_printf(m, "%u\n", od->od_contention_time); - return 0; + return sprintf(buf, "%u\n", od->od_contention_time); } -static ssize_t osc_contention_seconds_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t contention_seconds_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); struct osc_device *od = obd2osc_dev(obd); return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?: count; } -LPROC_SEQ_FOPS(osc_contention_seconds); +LUSTRE_RW_ATTR(contention_seconds); -static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v) +static ssize_t lockless_truncate_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); struct osc_device *od = obd2osc_dev(obd); - seq_printf(m, "%u\n", od->od_lockless_truncate); - return 0; + return sprintf(buf, "%u\n", od->od_lockless_truncate); } -static ssize_t osc_lockless_truncate_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t lockless_truncate_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *obd = ((struct seq_file *)file->private_data)->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); struct osc_device *od = obd2osc_dev(obd); return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?: count; } -LPROC_SEQ_FOPS(osc_lockless_truncate); +LUSTRE_RW_ATTR(lockless_truncate); -static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v) +static ssize_t destroys_in_flight_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - struct obd_device *obd = m->private; + struct obd_device *obd = container_of(kobj, struct obd_device, + obd_kobj); - seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_destroy_in_flight)); - return 0; + return sprintf(buf, "%u\n", + atomic_read(&obd->u.cli.cl_destroy_in_flight)); } -LPROC_SEQ_FOPS_RO(osc_destroys_in_flight); +LUSTRE_RO_ATTR(destroys_in_flight); -static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v) +static ssize_t max_pages_per_rpc_show(struct kobject *kobj, + struct attribute *attr, + char *buf) { - return lprocfs_obd_rd_max_pages_per_rpc(m, m->private); + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); + struct client_obd *cli = &dev->u.cli; + + return sprintf(buf, "%d\n", cli->cl_max_pages_per_rpc); } -static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file, - const char __user *buffer, - size_t count, loff_t *off) +static ssize_t max_pages_per_rpc_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct obd_device *dev = ((struct seq_file *)file->private_data)->private; + struct obd_device *dev = container_of(kobj, struct obd_device, + obd_kobj); struct client_obd *cli = &dev->u.cli; struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data; int chunk_mask, rc; - __u64 val; + unsigned long long val; - rc = lprocfs_write_u64_helper(buffer, count, &val); + rc = kstrtoull(buffer, 10, &val); if (rc) return rc; @@ -502,23 +542,19 @@ static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file, if (val >= ONE_MB_BRW_SIZE) val >>= PAGE_CACHE_SHIFT; - LPROCFS_CLIMP_CHECK(dev); - chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1); /* max_pages_per_rpc must be chunk aligned */ val = (val + ~chunk_mask) & chunk_mask; if (val == 0 || val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT) { - LPROCFS_CLIMP_EXIT(dev); return -ERANGE; } client_obd_list_lock(&cli->cl_loi_list_lock); cli->cl_max_pages_per_rpc = val; client_obd_list_unlock(&cli->cl_loi_list_lock); - LPROCFS_CLIMP_EXIT(dev); return count; } -LPROC_SEQ_FOPS(osc_obd_max_pages_per_rpc); +LUSTRE_RW_ATTR(max_pages_per_rpc); LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags); LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid); @@ -537,22 +573,9 @@ static struct lprocfs_vars lprocfs_osc_obd_vars[] = { /*{ "filegroups", lprocfs_rd_filegroups, NULL, 0 },*/ { "ost_server_uuid", &osc_server_uuid_fops, NULL, 0 }, { "ost_conn_uuid", &osc_conn_uuid_fops, NULL, 0 }, - { "active", &osc_active_fops, NULL }, - { "max_pages_per_rpc", &osc_obd_max_pages_per_rpc_fops, NULL }, - { "max_rpcs_in_flight", &osc_max_rpcs_in_flight_fops, NULL }, - { "destroys_in_flight", &osc_destroys_in_flight_fops, NULL, 0 }, - { "max_dirty_mb", &osc_max_dirty_mb_fops, NULL }, { "osc_cached_mb", &osc_cached_mb_fops, NULL }, - { "cur_dirty_bytes", &osc_cur_dirty_bytes_fops, NULL, 0 }, - { "cur_grant_bytes", &osc_cur_grant_bytes_fops, NULL }, - { "cur_lost_grant_bytes", &osc_cur_lost_grant_bytes_fops, NULL, 0}, - { "grant_shrink_interval", &osc_grant_shrink_interval_fops, NULL }, - { "checksums", &osc_checksum_fops, NULL }, { "checksum_type", &osc_checksum_type_fops, NULL }, - { "resend_count", &osc_resend_count_fops, NULL}, { "timeouts", &osc_timeouts_fops, NULL, 0 }, - { "contention_seconds", &osc_contention_seconds_fops, NULL }, - { "lockless_truncate", &osc_lockless_truncate_fops, NULL }, { "import", &osc_import_fops, NULL }, { "state", &osc_state_fops, NULL, 0 }, { "pinger_recov", &osc_pinger_recov_fops, NULL }, @@ -724,7 +747,29 @@ int lproc_osc_attach_seqstat(struct obd_device *dev) return rc; } +static struct attribute *osc_attrs[] = { + &lustre_attr_active.attr, + &lustre_attr_checksums.attr, + &lustre_attr_contention_seconds.attr, + &lustre_attr_cur_dirty_bytes.attr, + &lustre_attr_cur_grant_bytes.attr, + &lustre_attr_cur_lost_grant_bytes.attr, + &lustre_attr_destroys_in_flight.attr, + &lustre_attr_grant_shrink_interval.attr, + &lustre_attr_lockless_truncate.attr, + &lustre_attr_max_dirty_mb.attr, + &lustre_attr_max_pages_per_rpc.attr, + &lustre_attr_max_rpcs_in_flight.attr, + &lustre_attr_resend_count.attr, + NULL, +}; + +static struct attribute_group osc_attr_group = { + .attrs = osc_attrs, +}; + void lprocfs_osc_init_vars(struct lprocfs_static_vars *lvars) { + lvars->sysfs_vars = &osc_attr_group; lvars->obd_vars = lprocfs_osc_obd_vars; } diff --git a/drivers/staging/lustre/sysfs-fs-lustre b/drivers/staging/lustre/sysfs-fs-lustre index a99078c25d6a..5e2d55b5b173 100644 --- a/drivers/staging/lustre/sysfs-fs-lustre +++ b/drivers/staging/lustre/sysfs-fs-lustre @@ -391,7 +391,7 @@ Description: Maximum number of readdir pages to fit into a single readdir RPC. -What: /sys/fs/lustre/mdc/{connection_name}/max_rpcs_in_flight +What: /sys/fs/lustre/{mdc,osc}/{connection_name}/max_rpcs_in_flight Date: May 2015 Contact: "Oleg Drokin" Description: @@ -400,3 +400,108 @@ Description: latency links, but has a chance of overloading a server if you have too many clients like this. Default: 8 + +What: /sys/fs/lustre/osc/{connection_name}/max_pages_per_rpc +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Maximum number of pages to fit into a single RPC. + Typically bigger RPCs allow for better performance. + Default: however many pages to form 1M of data (256 pages + for 4K page sized platforms) + +What: /sys/fs/lustre/osc/{connection_name}/active +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls accessibility of this connection. If set to 0, + fail all accesses immediately. + +What: /sys/fs/lustre/osc/{connection_name}/checksums +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls whenever to checksum bulk RPC data over the wire + to this target. + 1: enable (default) ; 0: disable + +What: /sys/fs/lustre/osc/{connection_name}/contention_seconds +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls for how long to consider a file contended once + indicated as such by the server. + When a file is considered contended, all operations switch to + synchronous lockless mode to avoid cache and lock pingpong. + +What: /sys/fs/lustre/osc/{connection_name}/cur_dirty_bytes +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Displays how many dirty bytes is presently in the cache for this + target. + +What: /sys/fs/lustre/osc/{connection_name}/cur_grant_bytes +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Shows how many bytes we have as a "dirty cache" grant from the + server. Writing a value smaller than shown allows to release + some grant back to the server. + Dirty cache grant is a way Lustre ensures that cached successful + writes on client do not end up discarded by the server due to + lack of space later on. + +What: /sys/fs/lustre/osc/{connection_name}/cur_lost_grant_bytes +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Shows how many granted bytes were released to the server due + to lack of write activity on this client. + +What: /sys/fs/lustre/osc/{connection_name}/grant_shrink_interval +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Number of seconds with no write activity for this target + to start releasing dirty grant back to the server. + +What: /sys/fs/lustre/osc/{connection_name}/destroys_in_flight +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Number of DESTROY RPCs currently in flight to this target. + +What: /sys/fs/lustre/osc/{connection_name}/lockless_truncate +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls whether lockless truncate RPCs are allowed to this + target. + Lockless truncate causes server to perform the locking which + is beneficial if the truncate is not followed by a write + immediately. + 1: enable ; 0: disable (default) + +What: /sys/fs/lustre/osc/{connection_name}/max_dirty_mb +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls how much dirty data this client can accumulate + for this target. This is orthogonal to dirty grant and is + a hard limit even if the server would allow a bigger dirty + cache. + While allowing higher dirty cache is beneficial for write + performance, flushing write cache takes longer and as such + the node might be more prone to OOMs. + Having this value set too low might result in not being able + to sent too many parallel WRITE RPCs. + Default: 32 + +What: /sys/fs/lustre/osc/{connection_name}/resend_count +Date: May 2015 +Contact: "Oleg Drokin" +Description: + Controls how many times to try and resend RPCs to this target + that failed with "recoverable" status, such as EAGAIN, + ENOMEM. -- 2.30.2