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3f4298427a
linux/drivers/s390/char
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Heiko Carstens 3f4298427a s390/vmcp: make use of contiguous memory allocator 
If memory is fragmented it is unlikely that large order memory
allocations succeed. This has been an issue with the vmcp device
driver since a long time, since it requires large physical contiguous
memory ares for large responses.

To hopefully resolve this issue make use of the contiguous memory
allocator (cma). This patch adds a vmcp specific vmcp cma area with a
default size of 4MB. The size can be changed either via the
VMCP_CMA_SIZE config option at compile time or with the "vmcp_cma"
kernel parameter (e.g. "vmcp_cma=16m").

For any vmcp response buffers larger than 16k memory from the cma area
will be allocated. If such an allocation fails, there is a fallback to
the buddy allocator.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-08-09 09:09:35 -04:00
..
con3215.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
con3270.c s390: use false/true when using bool 2017-01-16 07:27:54 +01:00
ctrlchar.c s390/ctrlchar: improve handling of magic sysrequests 2015-08-26 17:20:44 +02:00
ctrlchar.h s390/ctrlchar: improve handling of magic sysrequests 2015-08-26 17:20:44 +02:00
defkeymap.c
defkeymap.map
diag_ftp.c s390/diag: add a statistic for diagnose calls 2015-10-14 14:32:06 +02:00
diag_ftp.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
fs3270.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
hmcdrv_cache.c s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
hmcdrv_cache.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
hmcdrv_dev.c assorted conversions to %p[dD] 2014-11-19 13:01:20 -05:00
hmcdrv_dev.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
hmcdrv_ftp.c s390/hmcdrv: constify hmcdrv_ftp_ops structs 2015-12-30 10:34:25 +01:00
hmcdrv_ftp.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
hmcdrv_mod.c s390/hmcdrv: remove unnecessary version.h inclusion 2015-01-15 11:11:16 +01:00
Kconfig s390/vmcp: make use of contiguous memory allocator 2017-08-09 09:09:35 -04:00
keyboard.c s390 keyboard.c: don't open-code strndup_user() 2017-05-15 23:41:50 -04:00
keyboard.h TTY: switch tty_schedule_flip 2013-01-15 22:43:15 -08:00
Makefile s390/sclp: move early printk code to drivers 2017-02-08 14:13:17 +01:00
monreader.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
monwriter.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
raw3270.c s390/raw3270: constify attribute_group structures. 2017-07-26 08:25:20 +02:00
raw3270.h s390/3270: avoid endless I/O loop with disconnected 3270 terminals 2016-05-04 16:29:53 +02:00
sclp_async.c s390/sclp_async: add Kconfig option to specify the component id 2014-11-28 09:45:11 +01:00
sclp_cmd.c s390/sclp: single increment assignment control 2017-07-26 08:25:13 +02:00
sclp_con.c s390/console: Make preferred console handling more consistent 2016-07-13 10:58:07 +02:00
sclp_config.c s390/sclp: add const to bin_attribute structure 2017-08-03 13:16:29 +02:00
sclp_cpi_sys.c s390/sclp: event type macro cleanup 2016-04-15 18:16:39 +02:00
sclp_cpi_sys.h
sclp_ctl.c s390: char: make slp_ctl explicitly non-modular 2016-11-10 16:55:46 +01:00
sclp_diag.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
sclp_early_core.c s390/sclp: get rid of common response code handling 2017-02-08 14:13:21 +01:00
sclp_early.c s390/mm: add no-dat TLB flush optimization 2017-07-25 06:55:30 +02:00
sclp_ftp.c s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
sclp_ftp.h s390/hmcdrv: HMC drive CD/DVD access 2014-09-25 10:52:02 +02:00
sclp_ocf.c s390/sclp_ocf: constify attribute_group structures. 2017-07-26 08:25:23 +02:00
sclp_pci.c s390/sclp: avoid compile warning in sclp_pci_report 2016-04-21 09:51:17 +02:00
sclp_quiesce.c s390: char: make slcp_quiesce explicitly non-modular 2016-10-31 17:55:39 +01:00
sclp_rw.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sclp_rw.h s390/sclp: avoid merged message output 2015-10-14 14:32:10 +02:00
sclp_sdias.c s390/sclp: pass timeout as HZ independent value 2015-06-15 10:50:57 +02:00
sclp_sdias.h s390/sclp: Move declarations for sclp_sdias into separate header file 2013-11-15 14:08:39 +01:00
sclp_tty.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sclp_tty.h
sclp_vt220.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
sclp.c s390: drivers: convert to use DRIVER_ATTR_RO/WO 2017-06-12 16:14:31 +02:00
sclp.h s390/sclp: get rid of common response code handling 2017-02-08 14:13:21 +01:00
tape_34xx.c s390/tape: remove redundant if statement 2015-01-22 12:51:49 +01:00
tape_3590.c s390/tape: Use memdup_user() rather than duplicating its implementation 2016-08-24 09:23:57 +02:00
tape_3590.h
tape_char.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
tape_class.c s390/drivers: Cocci spatch "ptr_ret.spatch" 2013-06-26 21:10:22 +02:00
tape_class.h
tape_core.c s390/tape: constify attribute_group structures. 2017-07-26 08:25:21 +02:00
tape_proc.c
tape_std.c s390/tape: Add missing destroy_timer_on_stack() 2014-04-01 09:23:37 +02:00
tape_std.h
tape.h
tty3270.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
tty3270.h
vmcp.c s390/vmcp: make use of contiguous memory allocator 2017-08-09 09:09:35 -04:00
vmcp.h s390/vmcp: make use of contiguous memory allocator 2017-08-09 09:09:35 -04:00
vmlogrdr.c s390: drivers: convert to use DRIVER_ATTR_RO/WO 2017-06-12 16:14:31 +02:00
vmur.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
vmur.h
zcore.c s390: proper type casts for csum_partial invocations 2017-01-16 07:27:53 +01:00