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SubjectRe: dentry cache grows to really large number on 64bit machine
Hi,
Another piece of information...
If i do on shell.

# while 1
# ./grow_dentry
# end
(grow_dentry is C code I've posted in previous msg.)

Then dentry_cache grows really fast.

But if within 'C' code if I write while(1), then everything is okay.
(No substantial growth ).

Thanks
-Kunal

On 12/6/06, Kunal Trivedi <ktrivedilkml@gmail.com> wrote:
> Hi,
> I am running 2.6.18 kernel on 64 bit AMD machine. (procinfo attached
> at the end of the mail). One of the things I have noticed that
> dentry_cache grows really fast under certain code path.
> So, far I have not seen any problems, but I would like to get some
> more input on this subject. Is it okay for dentry_cache to grow that
> much ?
>
> I've run following program for an ~1.00 hour. And my slabinfo shows following.
>
> # cat /proc/slabinfo | grep dentry
> dentry_cache 5228333 5228333 224 17 1 : tunables 120
> 60 8 : slabdata 307549 307549 0
>
>
> # cat /proc/meminfo
> MemTotal: 8173080 kB
> MemFree: 6787852 kB
> Buffers: 42048 kB
> Cached: 72616 kB
> SwapCached: 0 kB
> Active: 88608 kB
> Inactive: 29796 kB
> HighTotal: 0 kB
> HighFree: 0 kB
> LowTotal: 8173080 kB
> LowFree: 6787852 kB
> SwapTotal: 2096472 kB
> SwapFree: 2096472 kB
> Dirty: 48 kB
> Writeback: 0 kB
> AnonPages: 3716 kB
> Mapped: 3336 kB
> Slab: 1251292 kB
> PageTables: 192 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> CommitLimit: 10269552 kB
> Committed_AS: 11500 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed: 1272 kB
> VmallocChunk: 34359737015 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> Hugepagesize: 2048 kB
>
>
> int
> main()
> {
> int fd;
> char fname[] = "/tmp/proc-output-XXXXXX";
>
> fd = mkstemp(fname);
> close(fd);
> unlink(fname);
> return 0;
> }
>
> Please advice,
>
> Thanks
> -Kunal
>
-
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