Bug ID 467646: IDE DMA timeouts can result in stuck processes

Last Modified: May 14, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
11.1.0, 11.2.0, 11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.2, 11.4.1 HF9

Opened: Jun 17, 2014
Severity: 2-Critical
Related AskF5 Article:
K16184

Symptoms

If the device experiences an IDE DMA timeout, some processes become unresponsive and the kernel logs messages containing 'DMA timeout error' in kern.log. An unfulfilled request from the kernel of the IDE device might result in uninterruptible, stuck processes.

Impact

This condition can cause the i/o request to never complete and result in unresponsive and uninterruptible processes. Various symptoms result depending on the affected process. Some conditions might require a power cycle to correct.

Conditions

This occurs on VIPRION B4100/B4100N (A100), B4200/B4200N (A107) blades and on Virtual Edition (VE) configurations deployed with IDE storage drivers (Xen, Hyper-V).

Workaround

None

Fix Information

IDE DMA timeouts no longer result in become unresponsive on VIPRION B4100/B4100N (A100), B4200/B4200N (A107) blades and on Virtual Edition (VE) configurations deployed with IDE storage drivers (Xen, Hyper-V).

Behavior Change