RE: hugetlb bug

RE: hugetlb bug

[Zhang, Yanmin]

>>-----Original Message-----
>>From: linux-kernel-owner@vger.kernel.org [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of William Lee Irwin III
>>Sent: 2006年1月18日 16:37
>>To: HuaFeijun
>>Cc: linux-kernel@vger.kernel.org
>>Subject: Re: hugetlb bug
>>
>>On Wed, Jan 18, 2006 at 04:00:03PM +0800, HuaFeijun wrote:
>>> Is it kernel bug? The code works normally on ia64 machine,howerver, on
>>> EM64T,it fails tot work.
>>> The function call of shmat will change /proc/meminfo;and  the shmdt
>>> can't restore it to original content.  How to restore it to original
>>> stauts?Thanks.
>>> Is it kernel bug? The code works normally on ia64 machine,howerver,
>>> on EM64T,it fails tot work. The function call of shmat will change
>>> /proc/meminfo file's content;and  the shmdt can't restore the file's
>>> content.  How to restore it to original stauts?Thanks.
Did you check ipc? Command 'ipcs -a" could show all shared memory. I guess you app doesn't call shmctl(..., IPC_RMID, ...) after shmdt. Use ipcrm to release them manually.

Re: hugetlb bug

[William Lee Irwin III]

On Wed, Jan 18, 2006 at 04:00:03PM +0800, HuaFeijun wrote:
> Is it kernel bug? The code works normally on ia64 machine,howerver, on
> EM64T,it fails tot work.
> The function call of shmat will change /proc/meminfo;and  the shmdt
> can't restore it to original content.  How to restore it to original
> stauts?Thanks.
> Is it kernel bug? The code works normally on ia64 machine,howerver,
> on EM64T,it fails tot work. The function call of shmat will change
> /proc/meminfo file's content;and  the shmdt can't restore the file's
> content.  How to restore it to original stauts?Thanks.

Kernel versions for EM64T and ia64?


-- wli

hugetlb bug

[HuaFeijun]

[-- Attachment #1: Type: text/plain, Size: 253 bytes --]

Is it kernel bug? The code works normally on ia64 machine,howerver, on
EM64T,it fails tot work.
The function call of shmat will change /proc/meminfo;and  the shmdt
can't restore it to original content.  How to restore it to original
stauts?Thanks.

[-- Attachment #2: meminfo --]
[-- Type: text/plain, Size: 2310 bytes --]

Is it kernel bug? The code works normally on ia64 machine,howerver, on EM64T,it fails tot work.
The function call of shmat will change /proc/meminfo file's content;and  the shmdt
can't restore the file's content.  How to restore it to original stauts?Thanks.
-------------------------------------------------------
=== before shmat ===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    500
Hugepagesize:     2048 kB

=== after shmat ===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    0
Hugepagesize:     2048 kB

=== after shmdt===
MemTotal:      2056388 kB
MemFree:        607300 kB
Buffers:         43976 kB
Cached:         134252 kB
SwapCached:          0 kB
Active:         151940 kB
Inactive:        63436 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2056388 kB
LowFree:        607300 kB
SwapTotal:     4096564 kB
SwapFree:      4096564 kB
Dirty:             176 kB
Writeback:           0 kB
Mapped:          50880 kB
Slab:            93236 kB
Committed_AS:    90340 kB
PageTables:       3528 kB
VmallocTotal: 536870911 kB
VmallocUsed:    264436 kB
VmallocChunk: 536606243 kB
HugePages_Total:   500
HugePages_Free:    0
Hugepagesize:     2048 kB