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Subject[PATCH v8 0/3] console: Add persistent scrollback buffers for all VGA consoles
Reviewed-by: Andrey Utkin <>
Tested-by: Andrey Utkin <>
Tested-by: Adam Borowski <>

Changes in v8:
- Add Reviewed-by/Tested-By statements
Changes in v7:
- Add new callback to consw struct for flushing video console driver's
scrollback buffer. Fixes issues with escape sequence '\e[3J' reported
by Adam Borowski (
- Fix style issues
Changes in v6:
- Change of check if feature is enabled in
Changes in v5:
- Clearify documentation
- Skip superfluous array initialization
- Disable scrollback if buffer allocation fails
- Refactor vgacon_switch_scrollback()
- Rename vgacon_switch_scrollback() to vgacon_scrollback_switch()
- Add check for fg_console in vgacon_scrollback_update
Changes in v4.1:
- Fix compiler error
Changes in v4:
- Split into two patches
- Rework documentation
- Remove cosmetic changes in comments (postponed)
Changes in v3:
- Add config option for this feature
- Fallback to old scrollback buffer if kcalloc() fails
- Remove ioctl() call again and add documentation about existing
escape sequence to flush the scrollback buffer
Changes in v2:
- Add ioctl() call to flush scrollback buffer
- (Patch v2 was not labeled as such, sorry)

Manuel Schölling (3):
console: Move scrollback data into its own struct
console: Add callback to flush scrollback buffer to consw struct
console: Add persistent scrollback buffers for all VGA consoles

drivers/tty/vt/vt.c | 9 +++
drivers/video/console/Kconfig | 25 ++++++-
drivers/video/console/vgacon.c | 165 ++++++++++++++++++++++++++++-------------
include/linux/console.h | 4 +
4 files changed, 148 insertions(+), 55 deletions(-)


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