LKML Archive on
help / color / mirror / Atom feed
From: "Clem Taylor" <>
Subject: inotify_add_watch() returning ENOSPC in 2.6.24 [watch descriptor leak?]
Date: Tue, 5 Feb 2008 20:49:42 -0500	[thread overview]
Message-ID: <> (raw)

I'm trying to move a MIPS based embedded system from to
2.6.24. Most things seem to be working, but I'm having troubles with
inotify. The code is using inotify to detect a file written to /tmp
(tmpfs). The writer creates a file with a temporary name and then
rename()s the tmp file over the file I'm monitoring.

With, everything works fine, but with 2.6.24, the inotify
process runs for a while (~100 events) and then inotify_add_watch()
returns ENOSPC. Once this happens, I can't add new watches, even if I
kill the process and restart it. fs.inotify.max_user_instances and
fs.inotify.max_user_watches are both 128, so I'd imagine I'm hitting
this limit. For some reason the watches aren't getting cleaned up
(even after the process is killed).

In a loop, the code is doing:
    wd = inotify_add_watch(fd, file, IN_CLOSE_WRITE|IN_DELETE_SELF|IN_ONESHOT);
    blocking read on notify fd

Has something changed in the inotify() API since, or could
this be a leak?


             reply	other threads:[~2008-02-06  1:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-06  1:49 Clem Taylor [this message]
2008-02-06  9:51 ` Andrew Morton
2008-02-06 19:40   ` Clem Taylor
2008-02-07  3:04     ` Amy Griffis
2008-02-07 18:54     ` Ulisses Furquim
2008-02-07 21:24       ` Clem Taylor
2008-02-07 21:44         ` Andrew Morton

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \
    --subject='Re: inotify_add_watch() returning ENOSPC in 2.6.24 [watch descriptor leak?]' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).