[Devel] [PATCH vz7] fbcon: use kvmalloc() for scrollback buffer

Konstantin Khorenko

2018-11-20 09:20:17 UTC

The commit is pushed to "branch-rh7-3.10.0-862.20.2.vz7.73.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-862.20.2.vz7.73.6
------>
commit e60259bd950c2a51eabcb155bb4ca400852fa528
Author: Konstantin Khorenko <***@virtuozzo.com>
Date: Mon Nov 19 18:14:53 2018 +0300

fbcon: use kvmalloc() for scrollback buffer

Scrollback frame buffer is rather big - 32K,
so it requires 3rd order page, so let's use kvmalloc() instead of
ordinary kmalloc() for it.

https://pmc.acronis.com/browse/VSTOR-17781
https://jira.sw.ru/browse/HCI-188

Signed-off-by: Konstantin Khorenko <***@virtuozzo.com>
---
drivers/video/console/fbcon.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index e409686abee9..dbbf049956e3 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -993,7 +993,7 @@ static const char *fbcon_startup(void)
if (!softback_buf) {
softback_buf =
(unsigned long)
- kmalloc(fbcon_softback_size,
+ kvmalloc(fbcon_softback_size,
GFP_KERNEL);
if (!softback_buf) {
fbcon_softback_size = 0;
@@ -1002,7 +1002,7 @@ static const char *fbcon_startup(void)
}
} else {
if (softback_buf) {
- kfree((void *) softback_buf);
+ kvfree((void *) softback_buf);
softback_buf = 0;
softback_top = 0;
}
@@ -3551,7 +3551,7 @@ static void fbcon_exit(void)
if (fbcon_has_exited)
return;

- kfree((void *)softback_buf);
+ kvfree((void *)softback_buf);
softback_buf = 0UL;

for (i = 0; i < FB_MAX; i++) {