diff options
| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2014-02-17 10:16:10 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-02-21 07:50:23 (GMT) |
| commit | f7e1e65d29636d050cdde0770b9544572959a67d (patch) | |
| tree | 7cf1d6ffdbc3182ee8c19f6bfdcdfb5a681e8fc6 /drivers/s390/cio | |
| parent | fe7c30a420761654777d3cc15412fc7626407e93 (diff) | |
| download | linux-f7e1e65d29636d050cdde0770b9544572959a67d.tar.xz | |
s390: improve debug feature usage
The maximum usable buffer size of the s390 debug feature (when using
the sprintf_view) is 11 * sizeof(long) (1 pointer for the format
string + 10 arguments). When a larger buffer size is specified the
additional memory is unused and wasted per debug entry. So reducing
the buffer size to its maximum (or to the actual buffer size used)
will make more precious debug feature space usable.
For pci_msg, chsc_msg, and cio_crw we use the additional usable dbf
space to reduce the number of allocated pages.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/chsc_sch.c | 3 | ||||
| -rw-r--r-- | drivers/s390/cio/cio.c | 4 |
2 files changed, 3 insertions, 4 deletions
diff --git a/drivers/s390/cio/chsc_sch.c b/drivers/s390/cio/chsc_sch.c index 7b29d0b..1d3661a 100644 --- a/drivers/s390/cio/chsc_sch.c +++ b/drivers/s390/cio/chsc_sch.c @@ -173,8 +173,7 @@ static struct css_driver chsc_subchannel_driver = { static int __init chsc_init_dbfs(void) { - chsc_debug_msg_id = debug_register("chsc_msg", 16, 1, - 16 * sizeof(long)); + chsc_debug_msg_id = debug_register("chsc_msg", 8, 1, 4 * sizeof(long)); if (!chsc_debug_msg_id) goto out; debug_register_view(chsc_debug_msg_id, &debug_sprintf_view); diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 8ee88c4..97c48b3 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -54,7 +54,7 @@ debug_info_t *cio_debug_crw_id; */ static int __init cio_debug_init(void) { - cio_debug_msg_id = debug_register("cio_msg", 16, 1, 16 * sizeof(long)); + cio_debug_msg_id = debug_register("cio_msg", 16, 1, 11 * sizeof(long)); if (!cio_debug_msg_id) goto out_unregister; debug_register_view(cio_debug_msg_id, &debug_sprintf_view); @@ -64,7 +64,7 @@ static int __init cio_debug_init(void) goto out_unregister; debug_register_view(cio_debug_trace_id, &debug_hex_ascii_view); debug_set_level(cio_debug_trace_id, 2); - cio_debug_crw_id = debug_register("cio_crw", 16, 1, 16 * sizeof(long)); + cio_debug_crw_id = debug_register("cio_crw", 8, 1, 8 * sizeof(long)); if (!cio_debug_crw_id) goto out_unregister; debug_register_view(cio_debug_crw_id, &debug_sprintf_view); |