WRITE_ONE_PAGE(9) Memory Management in Linux WRITE_ONE_PAGE(9)NAME
write_one_page - write out a single page and optionally wait on I/O
SYNOPSIS
int write_one_page(struct page * page, int wait);
ARGUMENTS
page
the page to write
wait
if true, wait on writeout
DESCRIPTION
The page must be locked by the caller and will be unlocked upon return.
write_one_page returns a negative error code if I/O failed.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 WRITE_ONE_PAGE(9)
Check Out this Related Man Page
STRUCT PIPE_INODE_IN(9) pipes API STRUCT PIPE_INODE_IN(9)NAME
struct_pipe_inode_info - a linux kernel pipe
SYNOPSIS
struct pipe_inode_info {
struct mutex mutex;
wait_queue_head_t wait;
unsigned int nrbufs;
unsigned int curbuf;
unsigned int buffers;
unsigned int readers;
unsigned int writers;
unsigned int files;
unsigned int waiting_writers;
unsigned int r_counter;
unsigned int w_counter;
struct page * tmp_page;
struct fasync_struct * fasync_readers;
struct fasync_struct * fasync_writers;
struct pipe_buffer * bufs;
};
MEMBERS
mutex
mutex protecting the whole thing
wait
reader/writer wait point in case of empty/full pipe
nrbufs
the number of non-empty pipe buffers in this pipe
curbuf
the current pipe buffer entry
buffers
total number of buffers (should be a power of 2)
readers
number of current readers of this pipe
writers
number of current writers of this pipe
files
number of struct file refering this pipe (protected by ->i_lock)
waiting_writers
number of writers blocked waiting for room
r_counter
reader counter
w_counter
writer counter
tmp_page
cached released page
fasync_readers
reader side fasync
fasync_writers
writer side fasync
bufs
the circular array of pipe buffers
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 STRUCT PIPE_INODE_IN(9)
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