From e806cbbf5feb9763c1df9683a137bbc52086badf Mon Sep 17 00:00:00 2001 From: Xiaotian Wu Date: Tue, 26 Mar 2024 20:54:56 +0800 Subject: [PATCH 13/22] UniVt: double tty VT screenbuf for univt. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 当创建一个tty时，将screenbuf的空间翻倍，增加的空间用于存储utf8的编码信息。 Signed-off-by: Shi Pujin --- drivers/tty/vt/vt.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 52e6ca1ba21d..38f44e0f04ac 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1093,7 +1093,7 @@ int vc_allocate(unsigned int currcons) /* return 0 on success */ vc->vc_screenbuf_size > KMALLOC_MAX_SIZE || !vc->vc_screenbuf_size) goto err_free; err = -ENOMEM; - vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL); + vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size * 2, GFP_KERNEL); if (!vc->vc_screenbuf) goto err_free; @@ -1190,7 +1190,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, if (new_screen_size > KMALLOC_MAX_SIZE || !new_screen_size) return -EINVAL; - newscreen = kzalloc(new_screen_size, GFP_USER); + newscreen = kzalloc(new_screen_size * 2, GFP_USER); if (!newscreen) return -ENOMEM; @@ -3473,7 +3473,7 @@ static int __init con_init(void) tty_port_init(&vc->port); visual_init(vc, currcons, 1); /* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */ - vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); + vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size * 2, GFP_NOWAIT); vc_init(vc, currcons || !vc->vc_sw->con_save_screen); } currcons = fg_console = 0; -- 2.34.3