Michael Kerrisk wrote:
> Hi Li,
>
> On Tue, Aug 26, 2008 at 10:38 AM, Li Zefan <[EMAIL PROTECTED]> wrote:
>>> on 2.6.23 kernel on Mips and i686 arch.
>>>
>> ...
>>> -bash-3.2# ./inotify02
>>>
>>> inotify02 1 PASS : get event: wd=1 mask=40000004 cookie=0 len=0
>>> name=""
>>> inotify02 2 PASS : get event: wd=1 mask=100 cookie=0 len=16
>>> name="test_file1"
>>> inotify02 3 PASS : get event: wd=1 mask=20 cookie=0 len=16
>>> name="test_file1"
>>> inotify02 4 PASS : get event: wd=1 mask=8 cookie=0 len=16
>>> name="test_file1"
>>> inotify02 5 PASS : get event: wd=1 mask=40 cookie=23 len=16
>>> name="test_file1"
>>> inotify02 6 PASS : get event: wd=1 mask=80 cookie=23 len=16
>>> name="test_file2"
>>> inotify02 7 PASS : get event: wd=1 mask=800 cookie=0 len=0 name=""
>>> inotify02 8 PASS : get event: wd=1 mask=200 cookie=0 len=16
>>> name="test_file2"
>>> inotify02 9 PASS : get event: wd=1 mask=800 cookie=0 len=0 name=""
>>> inotify02 10 FAIL : get unnecessary event: wd=1 mask=800 cookie=0
>>> len=0name=""
>>> -bash-3.2#
>>>
>>>
>>> This inotify02 test case failed.
>>>
>>> Please give fix for the same.
>>>
>> But fix what...
>>
>> You are using 2.6.23, and the bug in inotify was fixed in 2.6.25, so the
>> above
>> is exactly the expected result.
>
> Actually, what was the bug in 2.6.24 and earlier? Maybe it is
> something that needs to be documented in man-pages.
>
In the manpage:
If successive output inotify events produced on the inotify file
descriptor are identical (same wd, mask, cookie, and name) then they
are coalesced into a single event.
This is not true in older kernels due to the bug.
The bug description and fix is 1c17d18e3775485bf1e0ce79575eb637a94494a2
I agree it's better to document it in man-pages.
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