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From: vda <vda@port.imtp.ilyichevsk.odessa.ua>
To: Dmitry Volkoff <vdb@mail.ru>, linux-kernel@vger.kernel.org
Subject: Re: Unfreeable buffer/cache problem in 2.4.17-rc1 still there
Date: Mon, 17 Dec 2001 15:01:12 -0200
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On Sunday 16 December 2001 17:39, Dmitry Volkoff wrote:
> Hello!
>
> Below is simple test case which I think is related to "memory disappear"
> problem.
>
> My real program is doing something like this:
>
> // test.c
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <stdio.h>
> #include <unistd.h>
>
> int main(void)
> {
>   int fd;
>   int r;
>   char data[10] = "0123456789";
>   int i;
>   int end = 30;
>   for (i=0;i<end;i++) {
>     fd = open("testfile", O_WRONLY | O_NDELAY | O_TRUNC | O_CREAT, 0644);
>     if (fd == -1) {
>       printf("unable to open\n");
>       return;
>     }
>     r = write(fd,data,sizeof data);
>     if (r == -1) {
>       printf("unable to write\n");
>       close(fd);
>       return;
>     }
>     close(fd);
>     sleep(1);
>   }
> }
> // end test.c

I removed sleep(1). Is it needed?

After 10000+ runs of this proggy swap usage isn't changed on 2.4.17-pre7.
top reports constant 2304K of swap usage.
--
vda
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