Messages in this thread | | | Date | Mon, 22 Oct 2001 06:01:32 -0400 (EDT) | From | Alexander Viro <> | Subject | Re: Kernel Compile in tmpfs crumples in 2.4.12 w/epoll patch |
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On 22 Oct 2001, Christoph Rohland wrote:
> Hi Larry, > > On Sun, 21 Oct 2001, Larry McVoy wrote: > > One of the engineers here has also seen this. The root cause is > > that readdir() is returning a file multiple times. We've seen it on > > tmpfs. We also have seen in in NFS and had a workaround, the > > workaround depended that the file would be returned twice right next > > to each other and that's not the case in tmpfs. wscott@bitmover.com
That's not guaranteed for NFS, BTW.
> > can provide you with the details of his machine config, here's the > > mail he sent a while back about it: > > tmpfs does not know anything about directory handling. It uses > generic_read_dir and dcache_readdir. So this must be a bug in the vfs > layer. Al, what do you say?
If you are changing directory between the calls of getdents(2) - you have no warranty that offsets will stay stable. It's not just Linux.
Frankly, I don't see what could be done, short of doing qsort() by inumber or something equivalent...
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