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authorAlexey Dobriyan <adobriyan@gmail.com>2007-02-10 01:46:45 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 11:18:07 -0800
commit4b98d11b40f03382918796f3c5c936d5495d20a4 (patch)
tree616b7260196c9bd0eaf208ef8fab91fcf9efcece /fs/read_write.c
parent18f705f49a5b19206233f7cef8f869ce7291f8c8 (diff)
downloadop-kernel-dev-4b98d11b40f03382918796f3c5c936d5495d20a4.zip
op-kernel-dev-4b98d11b40f03382918796f3c5c936d5495d20a4.tar.gz
[PATCH] ifdef ->rchar, ->wchar, ->syscr, ->syscw from task_struct
They are fat: 4x8 bytes in task_struct. They are uncoditionally updated in every fork, read, write and sendfile. They are used only if you have some "extended acct fields feature". And please, please, please, read(2) knows about bytes, not characters, why it is called "rchar"? Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Jay Lan <jlan@engr.sgi.com> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 707ac21..bcb0ef2 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -274,9 +274,9 @@ ssize_t vfs_read(struct file *file, char __user *buf, size_t count, loff_t *pos)
ret = do_sync_read(file, buf, count, pos);
if (ret > 0) {
fsnotify_access(file->f_path.dentry);
- current->rchar += ret;
+ add_rchar(current, ret);
}
- current->syscr++;
+ inc_syscr(current);
}
}
@@ -332,9 +332,9 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
ret = do_sync_write(file, buf, count, pos);
if (ret > 0) {
fsnotify_modify(file->f_path.dentry);
- current->wchar += ret;
+ add_wchar(current, ret);
}
- current->syscw++;
+ inc_syscw(current);
}
}
@@ -675,8 +675,8 @@ sys_readv(unsigned long fd, const struct iovec __user *vec, unsigned long vlen)
}
if (ret > 0)
- current->rchar += ret;
- current->syscr++;
+ add_rchar(current, ret);
+ inc_syscr(current);
return ret;
}
@@ -696,8 +696,8 @@ sys_writev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen)
}
if (ret > 0)
- current->wchar += ret;
- current->syscw++;
+ add_wchar(current, ret);
+ inc_syscw(current);
return ret;
}
@@ -779,12 +779,12 @@ static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
retval = in_file->f_op->sendfile(in_file, ppos, count, file_send_actor, out_file);
if (retval > 0) {
- current->rchar += retval;
- current->wchar += retval;
+ add_rchar(current, retval);
+ add_wchar(current, retval);
}
- current->syscr++;
- current->syscw++;
+ inc_syscr(current);
+ inc_syscw(current);
if (*ppos > max)
retval = -EOVERFLOW;
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