I am not sure if this really is a bug or just expected behaviour with ext3 in ordered mode with luks / dm-crypt adding some extra latency ... ---- I am experiencing really bad performance and a fair amount of system stalls using dm-crypt(luks) on debian lenny with with an ext3 ordered mode / " Version: 1 Cipher name: aes Cipher mode: cbc-essiv:sha256 Hash spec: sha1 " /dev/mapper/foo-root on / type ext3 (rw,relatime,errors=remount-ro) Swap is also within the luks partition. The kernel version is 2.6.35.4. A simple test is just to dd if=/dev/zero of=DELETEME for a short time and the system will stall rather a lot - it is not a complete lock up - just the entire system is unresponsive for large periods at a time (from around 30seconds - to 2 minutes). This may be related to http://thread.gmane.org/gmane.linux.kernel.mm/51444 . The system is a 6 core amd phenom with 4gb of ram - the hard drive is a WD 1TB sata 3 drive hooked up to a (sata 3 controller) 00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [IDE mode] (rev 40) 00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [IDE mode] (rev 40) (prog-if 01 [AHCI 1.0]) Subsystem: ASUSTeK Computer Inc. Device 8443 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+ Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 42 Region 0: I/O ports at c000 [size=8] Region 1: I/O ports at b000 [size=4] Region 2: I/O ports at a000 [size=8] Region 3: I/O ports at 9000 [size=4] Region 4: I/O ports at 8000 [size=16] Region 5: Memory at fe8ffc00 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ Queue=0/2 Enable+ Address: 00000000fee3f00c Data: 4161 Capabilities: [70] SATA HBA <?> Capabilities: [a4] PCIe advanced features <?> Kernel driver in use: ahci Kernel modules: ahci _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
