Re: [RFC][PATCH] VFS: create /proc//mountinfo

Pavel Machek
2008-01-23T18:22:44Z

On Sun 2008-01-20 09:23:00, Miklos Szeredi wrote:
> > Miklos Szeredi wrote:
> > > - for mount ID's use IDA (from the IDR library) instead of a 32bit
> > > counter, which could overflow
> >
> > IDAs tend to get reused quickly, which can cause race conditions. Any
> > reason not to just use a 64-bit counter?
>
> They tend to become hard to parse/compare for humans after a while.
> And all this is basically only for humans, so race conditions don't
> really matter. Also a changed mount with a reused ID is easily
> identified by comparing the other fields.

Hmm, smart humans only compare last few digits if they don't care
about 100% reliability, and dumb software compares 64bits easily...
Pavel
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