Re: 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 <[email protected]> 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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • dentry cache grows to really large number on 64bit machine
    • From: "Kunal Trivedi" <[email protected]>

• Prev by Date: Re: Obtaining a list of memory address ranges allocated to processes
• Next by Date: Re: [PATCH] mm: D-cache aliasing issue in cow_user_page
• Previous by thread: dentry cache grows to really large number on 64bit machine
• Next by thread: [PATCH 1/2] eCryptfs: Public key; transport mechanism
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]