(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Wed, 28 May 2008 03:52:37 -0700 (PDT) bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=10810 > > Summary: Performance regression on DAC960 and kernel 2.6.24+ > Product: IO/Storage > Version: 2.5 > KernelVersion: 2.6.24, 2.6.25 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: high > Priority: P1 > Component: Block Layer > AssignedTo: axboe@xxxxxxxxx > ReportedBy: alex@xxxxxxxxxx > > > Latest working kernel version: > 2.6.23 > > Earliest failing kernel version: > 2.6.24 > > Distribution: > Debian > > Hardware Environment: > 00:00.0 RAM memory: nVidia Corporation C51 Host Bridge (rev a2) > 00:00.1 RAM memory: nVidia Corporation C51 Memory Controller 0 (rev a2) > 00:00.2 RAM memory: nVidia Corporation C51 Memory Controller 1 (rev a2) > 00:00.3 RAM memory: nVidia Corporation C51 Memory Controller 5 (rev a2) > 00:00.4 RAM memory: nVidia Corporation C51 Memory Controller 4 (rev a2) > 00:00.5 RAM memory: nVidia Corporation C51 Host Bridge (rev a2) > 00:00.6 RAM memory: nVidia Corporation C51 Memory Controller 3 (rev a2) > 00:00.7 RAM memory: nVidia Corporation C51 Memory Controller 2 (rev a2) > 00:02.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1) > 00:03.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1) > 00:04.0 PCI bridge: nVidia Corporation C51 PCI Express Bridge (rev a1) > 00:05.0 VGA compatible controller: nVidia Corporation C51G [GeForce 6100] (rev > a2) > 00:09.0 RAM memory: nVidia Corporation MCP51 Host Bridge (rev a2) > 00:0a.0 ISA bridge: nVidia Corporation MCP51 LPC Bridge (rev a2) > 00:0a.1 SMBus: nVidia Corporation MCP51 SMBus (rev a2) > 00:0b.0 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2) > 00:0b.1 USB Controller: nVidia Corporation MCP51 USB Controller (rev a2) > 00:0d.0 IDE interface: nVidia Corporation MCP51 IDE (rev a1) > 00:0e.0 IDE interface: nVidia Corporation MCP51 Serial ATA Controller (rev a1) > 00:10.0 PCI bridge: nVidia Corporation MCP51 PCI Bridge (rev a2) > 00:14.0 Bridge: nVidia Corporation MCP51 Ethernet Controller (rev a1) > 00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] > HyperTransport Technology Configuration > 00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address > Map > 00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM > Controller > 00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] > Miscellaneous Control > 04:08.0 RAID bus controller: Mylex Corporation AcceleRAID 352/170/160 support > Device (rev 02) > > Software Environment: > Debian Lenny 64bit > > Problem Description: > I/O Access is very slow on some condition, for example samba users can't write > more than a few KB/sec on the shares. > Also tomcat is veeeery slow to startup (at least 3 times the normal time). > > Steps to reproduce: > Simply boot with the new kernel Oh dear. There's been only one change to DAC960.c in that timeframe: commit 0156c2547e92df559d5592aad9535838ef459615 Author: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> Date: Tue Dec 11 17:43:15 2007 -0500 blk_end_request: changing DAC960 (take 4) This patch converts DAC960 to use blk_end_request interfaces. Related 'UpToDate' arguments are converted to 'Error'. Signed-off-by: Kiyoshi Ueda <k-ueda@xxxxxxxxxxxxx> Signed-off-by: Jun'ichi Nomura <j-nomura@xxxxxxxxxxxxx> Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> :100644 100644 9030c37... cd03473... M drivers/block/DAC960.c commit 117636092a87a28a013a4acb5de5492645ed620f Author: Ralf Baechle <ralf@xxxxxxxxxxxxxx> Date: Tue Oct 23 20:42:11 2007 +0200 [PATCH] Fix breakage after SG cleanups and I don't see how it could cause this. The breakage is probably external to the driver. I don't know what it could be and I don't know anyone who can be asked to look into it. If you have time, the only way I can think of getting to the bottom of this is if you were to run a git bisection search as per http://www.kernel.org/doc/local/git-quick.html. Sorry. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
