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Subject: Re: Inotify problem [was Re: 2.6.13-rc6-mm1]
From: Johannes Berg <johannes@sipsolutions.net>
To: John McCutchan <ttb@tentacle.dhs.org>
Cc: Robert Love <rml@novell.com>, Reuben Farrelly <reuben-lkml@reub.net>,
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On Thu, 2005-08-25 at 10:06 -0400, John McCutchan wrote:
> > it fails on 2.6.13-rc6 as soon as the device is full and doesn't hold
> > any more directories.

Obviously this wasn't true, I was hitting the 8192 watches limit and
misinterpreted the error message. I just tested up to 100000 watches
with this program.

> Could you send me the new test program?

Below.

johannes

/* Author: Johannes Berg <johannes@sipsolutions.net>
 *
 * This is another small inotify test program that simply
 * repeatedly adds watches.
 */

#include <stdio.h>
#include <linux/inotify.h>
#include <linux/inotify-syscalls.h>

int main()
{
	int fd;
	int wd1, wd2;
	int ret, i =3D 0;
	char buf[1024];

	fd =3D inotify_init();

	if (fd < 0)
		perror("inotify_init");

	printf("inotify_init returned fd %d\n", fd);
=09
	mkdir("/tmp/inotify-test-dir-rm-rf-this", 0777);

	while (1) {
		i++;
		snprintf(buf,sizeof(buf),"/tmp/inotify-test-dir-rm-rf-this/%d",i>>10);
		mkdir(buf,0777);
		snprintf(buf,sizeof(buf),"/tmp/inotify-test-dir-rm-rf-this/%d/%d",i>>10,i=
);
		mkdir(buf, 0777);
		wd1 =3D inotify_add_watch(fd, buf, IN_ALL_EVENTS);

		if (wd1 < 0) {
			perror("inotify_add_watch");
			break;
		}
		printf("inotify_add_watch returned wd1 %d\n", wd1);
	}
}


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