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DateWed, 6 Dec 2006 23:21:36 -0800
From"Kunal Trivedi" <>
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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