Re: which fields in /proc/meminfo are orthogonal?

[meherjaya <JayasriS@aaesys.com>]

Hi Andy,

     I am seeing similar kind of issue, where SUnreclaim increases. How did
you resolve your issue.

Thanks
Jayasri


Andy Walls-2 wrote:
> 
> On Tue, 2010-01-26 at 14:47 -0600, Chris Friesen wrote:
>> On 01/26/2010 01:03 PM, Chris Friesen wrote:
>> 
>> > I'm currently trying to figure out which of the entries in
>> /proc/meminfo
>> > are actually orthogonal to each other.  Ideally I'd like to be able to
>> > add up the suitable entries and have it work out to the total memory on
>> > the system, so that I can then narrow down exactly where the memory is
>> > going.  Is this feasable?
>> 
>> I've tried adding up
>> MemFree+Buffers+Cached+AnonPages+Mapped+Slab+PageTables+VmallocUsed
> 
> VmallocUsed referws to Vmalloc address space consumption.  However,
> Vmalloc address space is not used exclusively to map system RAM into
> virtual address space.  It is also used to map PCI MMIO windows to the
> register sets or memory chips on PCI cards into the vritual address
> space.
> 
> Regards,
> Andy
> 
> 
>> (hugepages are disabled and there is no swap)
>> 
>> Shortly after boot this gets me within about 3MB of MemTotal.  However,
>> after 1070 minutes there is a 64MB difference between MemTotal and the
>> above sum.
>> 
>> Here's /proc/meminfo after 1070 minutes:
>> 
>> MemTotal:      4042848 kB
>> MemFree:        406112 kB
>> Buffers:         12072 kB
>> Cached:        3068368 kB
>> SwapCached:          0 kB
>> Active:         671200 kB
>> Inactive:      2711952 kB
>> SwapTotal:           0 kB
>> SwapFree:            0 kB
>> Dirty:              44 kB
>> Writeback:           0 kB
>> AnonPages:      235864 kB
>> Mapped:          30752 kB
>> Slab:           200156 kB
>> SReclaimable:   142828 kB
>> SUnreclaim:      57328 kB
>> PageTables:       4320 kB
>> NFS_Unstable:        0 kB
>> Bounce:              0 kB
>> WritebackTmp:        0 kB
>> CommitLimit:   2021424 kB
>> Committed_AS:  2593116 kB
>> VmallocTotal: 34359738367 kB
>> VmallocUsed:     21496 kB
>> VmallocChunk: 34359716779 kB
>> HugePages_Total:     0
>> HugePages_Free:      0
>> HugePages_Rsvd:      0
>> HugePages_Surp:      0
>> Hugepagesize:     2048 kB
>> DirectMap4k:      3008 kB
>> DirectMap2M:   4190208 kB
>> 
>> Any ideas how to track down the missing memory?
>> 
>> Chris
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