Known problems with megaraid under 2.4.25 highmem?

[Tvrtko A. Uršulin]

Hello,

I have experienced an I/O lockup on my dual Xeon server with megaraid adapter 
when kernel was compiled with highmem and highmem i/o. It happened during 
compilation of mysql with no other load.

Then I recompiled the kernel wo/highmem and everything is stable.

As, this server is now in production on different location I cannot do much 
testing except giving detailed hw info.

00:00.0 Host bridge: Intel Corporation: Unknown device 254c (rev 01)
00:00.1 Class ff00: Intel Corporation: Unknown device 2541 (rev 01)
00:03.0 PCI bridge: Intel Corporation: Unknown device 2545 (rev 01)
00:03.1 Class ff00: Intel Corporation: Unknown device 2546 (rev 01)
00:1d.0 USB Controller: Intel Corporation: Unknown device 2482 (rev 02)
00:1d.1 USB Controller: Intel Corporation: Unknown device 2484 (rev 02)
00:1d.2 USB Controller: Intel Corporation: Unknown device 2487 (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801BAM PCI (rev 42)
00:1f.0 ISA bridge: Intel Corporation: Unknown device 2480 (rev 02)
00:1f.1 IDE interface: Intel Corporation: Unknown device 248b (rev 02)
00:1f.3 SMBus: Intel Corporation: Unknown device 2483 (rev 02)
01:0c.0 VGA compatible controller: ATI Technologies Inc Rage XL (rev 27)
02:1c.0 PIC: Intel Corporation: Unknown device 1461 (rev 04)
02:1d.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 04)
02:1e.0 PIC: Intel Corporation: Unknown device 1461 (rev 04)
02:1f.0 PCI bridge: Intel Corporation: Unknown device 1460 (rev 04)
03:04.0 SCSI storage controller: Adaptec: Unknown device 801f (rev 03)
03:04.1 SCSI storage controller: Adaptec: Unknown device 801f (rev 03)
04:02.0 RAID bus controller: Symbios Logic Inc. (formerly NCR): Unknown device 
1960 (rev 01)
04:05.0 Ethernet controller: Intel Corporation: Unknown device 1010 (rev 01)
04:05.1 Ethernet controller: Intel Corporation: Unknown device 1010 (rev 01)


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