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Hello expert,<br />
<br />
&nbsp; I am trying to create a section of share memory using <br />
<br />
shmget((key_t)1234, sizeof(struct shared_use_st), 0666 | IPC_CREAT);<br />
<br />
it return ok if the size I want to create is around 552 (printf(&quot;Size:%d&quot;, sizeof(struct shared_use_st));<br />
<br />
However shmget() return -1 if the size of the structure is increase to 560.<br />
<br />
I do a &quot;free&quot; command on my console and it shows I should have 10.9M free RAM<br />
<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; total &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;used &nbsp; &nbsp; free <br />
mem: 14844 &nbsp; &nbsp; &nbsp; &nbsp;3900 &nbsp; &nbsp; 10944<br />
<br />
Any suggestion?<br />

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Hello expert,

  I am trying to create a section of share memory using 

shmget((key_t)1234, sizeof(struct shared_use_st), 0666 | IPC_CREAT);

it return ok if the size I want to create is around 552 (printf("Size:%d", sizeof(struct shared_use_st));

However shmget() return -1 if the size of the structure is increase to 560.

I do a "free" command on my console and it shows I should have 10.9M free RAM

          total          used     free 
mem: 14844        3900     10944

Any suggestion?


Shmget Fail

Kernel programming for Linux operating systems can be done with many different languages; C, C++, Python, Perl and Java, which are some of the most common languages used.There are also many different varieties of Linux, such as Ubuntu, Fedora and OpenSUSE.