Sun Fire E6900 Server
 
Sun Fire E25K Server
 
Sun Fire E20K Server
 
Sun Fire V890 Server
 
Sun Fire E4900 Server
 
Sun Fire E2900 Server
 
Sun Fire V490 Server
 

GCS>Sun Microsystems>Sun FAB>Standard>Controlled Proactive
 

• Xoption Number: X7274A
• Xoption Description: V490/890 Processor module, 16GB

• Xoption Number: X7273A
• Xoption Description: V490/890 Processor module, 8GB

• Xoption Number: A53-CLH8C264GTD
• Xoption Description: A53,8X1500MHZ,64GB,4X146GB

• Xoption Number: A53-CLH8C232GTD
• Xoption Description: A53,8X1500MHZ,32GB,4X146GB

• Xoption Number: A53-CLH4C216GTD
• Xoption Description: A53,4X1500MHZ,16GB,4X146GB

• Xoption Number: A53-CLH2C216GTD
• Xoption Description: A53,2X1500MHZ,16GB,4X146GB

• Xoption Number: A53-CLH2C208GTD
• Xoption Description: A53,2X1500MHZ,8GB,4X146GB

• Xoption Number: A52-CLH4C232GTB
• Xoption Description: A52,4X1500MHZ,32GB,2X146GB

• Xoption Number: A52-CLH4C216GTB
• Xoption Description: A52,4X1500MHZ,16GB,2X146GB

• Xoption Number: A52-CLH2C216GTB
• Xoption Description: A52,2X1500MHZ,16GB,2X146GB

• Xoption Number: A52-CLH2C208GTB
• Xoption Description: A52,2X1500MHZ,8GB,2X146GB

• Xoption Number: XE29BRD-484-1500
• Xoption Description: E2900BRD:4USIV+@1.5GHZ/32GB

• Xoption Number: XE29BRD-482-1500C
• Xoption Description: E2900 COD BRD 1.5GHZ 4P16GB

• Xoption Number: XE20BRD-482-1500
• Xoption Description: E2900BRD:4USIV+@1.5GHZ/16GB

• Xoption Number: XE29BRD-484-1500C
• Xoption Description: E2900 COD BRD 1.5GHZ 4P32GB

• Xoption Number: XUS4BRD-484-1500C
• Xoption Description: COD,CPU,4PROC@1500/32GB USS400

• Xoption Number: XUS4BRD-482-1500C
• Xoption Description: COD,CPU,4PROC@1500/16GB USS400

• Xoption Number: XUS4BRD-484-1500
• Xoption Description: ASY,CPU,4PROC@1500/32GB USS400

• Xoption Number: XUS4BRD-482-1500
• Xoption Description: ASY,CPU,4PROC@1500/16GB USS400

Software applications using 32M or 256M memory page sizes, running on UltraSPARC IV+ CPUs, can hang or core dump.

This issue can occur if all of the following are true.

• The system contains an UltraSPARC IV+ System Board
• The installed OS is S10 3/05 HW1 without patch 118822-18 (KU18)
• A software application utilizes 32M or 256M memory page sizes

This issue can be triggered by one of the following actions.

1. An application explicitly uses memcntl() to take advantage of the 32M/256M page sizes for either heap or mmap'ed segments (/dev/zero), generates code into these segments, and tries to execute the code.

2. The issue can also occur if an application places code into an ISM segment and tries to execute from there.  Since historically ISM segments have PROT_EXEC permission, a user might expect it to work.

In diagnosing this issue, it helps to identify if the application has used any Multiple Page Size Support (MPSS) options during invocation, or if the application calls memcntl(2) to use large pages internally.

The UltraSPARC IV+ IMMU does not support the 32M or 256M page sizes. If the processor cannot translate a virtual address to a physical address, it takes a trap known as a tlb miss.  Solaris will execute the appropriate trap handler and try to load the correct translation for that virtual address.  If a tlb miss occurs on an instruction which came from a segment mapped with either of these large pages, the corresponding application will execute improperly, most likely resulting in a core dump or hang.  

The final resolution for this issue (CR 6287398) is now available in patch 118822-20 or higher.  A partial resolution is available in patch 118822-18, which turns off USIV+ 32M and 256M page size support.

If an application is core dumping on an UltraSPARC IV+ system, the following steps should be taken.

1. Determine the OS and patches that are installed. (use "uname -a" and "showrev -p")

2. Look at how the application was invoked, and also if any MPSS options were used during invocation (use "pmap -x -s <PID>").  It also helps to know if memcntl() is used inside the application to configure large pages.

3. KU20 (118822-20) or later patches should be applied to resolve the issue.  KU18 (118822-18) will provide a partial fix by turning off large page size support.  Until either of these patches is applied, the following workaround can be used.

Workaround

Disable 32M/256M pages by setting the following variables in the /etc/system file.  You must reboot the system for the changes to take affect.

   set disable_large_pages = 0x30
   set disable_ism_large_pages = 0x34
   set mmu_ism_pagesize = 4194304

Note: If the above contributing factors are not present, this could be a different application issue.  During diagnosis, it can be helpful to look at the /etc/system file on the customer's system to see if any changes were made to this file.

• Added E2900, E4900, E6900 platforms to Affected Products.

• Added E20K and E25K platforms to Affected Products.

• Added patch 118822-20 as the final resolution.

None.

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