This is the mail archive of the
cygwin-patches
mailing list for the Cygwin project.
Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
On Sep 22 11:32, Corinna Vinschen wrote:
> On Sep 22 07:45, Yoni Londner wrote:
> > I checked out why, and found out that #1 and #2 don't modify the
> > access time of the file, whereas #3 does. This already immediately
>
> I just checked this and I can't see that it does. If it would do
> so, shouldn't the access time be different every time I call stat?
>
> $ stat foo | grep 'Access: [0-9]'
> Access: 2010-09-09 16:27:20.769055700 +0200
> $ stat foo | grep 'Access: [0-9]'
> Access: 2010-09-09 16:27:20.769055700 +0200
> $ stat foo | grep 'Access: [0-9]'
> Access: 2010-09-09 16:27:20.769055700 +0200
>
> I tried it on Windows XP SP3 and Windows 7.
Did you test this on a "noacl" mount, or on a filesystem which doesn't
keep permissions, like FAT? If so, then I know what happens. This is
the executable test in fhandler_base::fstat_helper. It reads the first
two bytes from the file to identify executables by their magic number.
This is especially done to identify shell scripts by their "#!" magic,
so that they are marked as executable in st_mode. You can switch this
off by specifing the "exec" or "notexec" mount options.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
- References:
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance
- Re: Cygwin Filesystem Performance degradation 1.7.5 vs 1.7.7, and methods for improving performance