Yafang Shao laoar
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| --- a/include/linux/memcontrol.h | |
| +++ b/include/linux/memcontrol.h | |
| @@ -21,6 +21,7 @@ | |
| #include <linux/vmstat.h> | |
| #include <linux/writeback.h> | |
| #include <linux/page-flags.h> | |
| +#include <linux/oom.h> | |
| struct mem_cgroup; | |
| struct page; |
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| --- a/fs/pipe.c | |
| +++ b/fs/pipe.c | |
| @@ -145,7 +145,7 @@ static int anon_pipe_buf_steal(struct pipe_inode_info *pipe, | |
| if (page_count(page) == 1) { | |
| if (memcg_kmem_enabled()) | |
| - memcg_kmem_uncharge(page, 0); | |
| + memcg_kmem_uncharge(page, 0, NULL); | |
| __SetPageLocked(page); | |
| return 0; |
laoar
/ netns: tcp_rto_max.diff
Last active
October 22, 2017 10:20
introduce a new sysctl knob sysctl_tcp_rto_max to control the max value of TCP_RTO and make it in netns
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| diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h | |
| index 9a14a08..f12c655 100644 | |
| --- a/include/net/netns/ipv4.h | |
| +++ b/include/net/netns/ipv4.h | |
| @@ -125,6 +125,7 @@ struct netns_ipv4 { | |
| int sysctl_tcp_sack; | |
| int sysctl_tcp_window_scaling; | |
| int sysctl_tcp_timestamps; | |
| + int sysctl_tcp_rto_max; | |
| struct inet_timewait_death_row tcp_death_row; |
laoar
/ mmap_zcopy
Last active
June 3, 2024 09:07
an example of kernel space to user space zero-copy via mmap, and also the comparing mmap with read/write
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| #include <linux/module.h> | |
| #include <linux/kernel.h> | |
| #include <linux/device.h> | |
| #include <linux/init.h> | |
| #include <linux/fs.h> | |
| #include <linux/mm.h> | |
| #include <asm/uaccess.h> | |
| #define MAX_SIZE (PAGE_SIZE * 2) /* max size mmaped to userspace */ | |
| #define DEVICE_NAME "mchar" |
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