[Bug 571235] Re: Slow CIFS navigation

[Se6]

apport information

** Tags added: apport-collected

** Description changed:

  On Karmic, with 2.6.31-20, I have noticed an important decrease of
  performances while navigating CIFS shares (with mount.cifs) on a Windows
  2003 server. (Compared to a older installation with 2.6.27-8).
  Navigating means here either using midnight commander, ls -l (with ls
  unaliased first...), rsync, etc..
  
  The kind of performance degradation I am talking about is in the order
  of times ten or so. An rsync which takes less that 2 minutes on old
  hardware, now takes over 15 minutes on newer hardware!
  
  Doing a bit of investigation with tcpdump, we can see a lot
  QUERY_PATH_INFO requests happening which are not necessary as all the
  information is already returned by FIND_FIRST2 requests. A trivial
  example will illustrate it. Lets have a directory with 3 files inside.
  
  ls -l with my old machine, it gives:
  Protocol Info
  SMB      Trans2 Request, QUERY_PATH_INFO, Query File All Info, Path: \Temp
  SMB      Trans2 Response, QUERY_PATH_INFO
  SMB      Trans2 Request, FIND_FIRST2, Pattern: \Temp\*
  SMB      Trans2 Response, FIND_FIRST2, Files: . .. file1 file2 file3
  
  With the new one, it gives:
  Protocol Info
  SMB      Trans2 Request, QUERY_PATH_INFO, Query File All Info, Path: \Temp
  SMB      Trans2 Response, QUERY_PATH_INFO
  SMB      Trans2 Request, FIND_FIRST2, Pattern: \Temp\*
  SMB      Trans2 Response, FIND_FIRST2, Files: . .. file1 file2 file3
  SMB      Trans2 Request, QUERY_PATH_INFO, Query File All Info, Path:\Temp\file1
  SMB      Trans2 Response, QUERY_PATH_INFO
  SMB      Trans2 Request, QUERY_PATH_INFO, Query File All Info, Path:\Temp\file2
  SMB      Trans2 Response, QUERY_PATH_INFO
  SMB      Trans2 Request, QUERY_PATH_INFO, Query File All Info, Path:\Temp\file3
  SMB      Trans2 Response, QUERY_PATH_INFO
  
  So for every file in the directory, as returned by the FIRST_FIND2
  response, it does a QUERY_PATH_INFO, which does not bring any new
  information, all the attributes were already returned by FIRST_FIND2.
  
  Looking around in linux-cifs-client mailing list and contacting a few developers, it is believed this problem is now fixed in 2.6.31.13, commit f12f98dba6ea1517cd7fbb912208893b9c014c15. (cifs: fix length calculation for converted unicode readdir names)
  Will 2.6.31.13 make it to Karmic?
  
  Thanks,
  
  Seb.
+ --- 
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
+ AplayDevices:
+  **** List of PLAYBACK Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ Architecture: i386
+ ArecordDevices:
+  **** List of CAPTURE Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  seb        1416 F.... pulseaudio
+ Card0.Amixer.info:
+  Card hw:0 'Intel'/'HDA Intel at 0xd6700000 irq 22'
+    Mixer name	: 'Realtek ALC268'
+    Components	: 'HDA:10ec0268,1179ff66,00100003 HDA:11c11040,11790001,00100200'
+    Controls      : 13
+    Simple ctrls  : 8
+ DistroRelease: Ubuntu 10.04
+ EcryptfsInUse: Yes
+ HibernationDevice: RESUME=UUID=aa796e4d-a2f7-4bbe-843b-770d3f422913
+ InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
+ MachineType: TOSHIBA Satellite L300
+ Package: linux (not installed)
+ ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=fdb933e6-993d-4a2e-b43a-99da4b76bd3b ro quiet splash acpi_osi=Linux
+ ProcEnviron:
+  PATH=(custom, user)
+  LANG=en_US.utf8
+  SHELL=/bin/bash
+ ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
+ Regression: Yes
+ RelatedPackageVersions: linux-firmware 1.34
+ Reproducible: Yes
+ RfKill:
+  0: phy0: Wireless LAN
+  	Soft blocked: no
+  	Hard blocked: no
+ Tags: lucid kconfig regression-release needs-upstream-testing
+ Uname: Linux 2.6.32-22-generic i686
+ UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
+ dmi.bios.date: 06/04/2009
+ dmi.bios.vendor: INSYDE
+ dmi.bios.version: 1.90
+ dmi.board.asset.tag: Base Board Asset Tag
+ dmi.board.name: Portable PC
+ dmi.board.vendor: TOSHIBA
+ dmi.board.version: Base Board Version
+ dmi.chassis.asset.tag: No Asset Tag
+ dmi.chassis.type: 10
+ dmi.chassis.vendor: Chassis Manufacturer
+ dmi.chassis.version: Chassis Version
+ dmi.modalias: dmi:bvnINSYDE:bvr1.90:bd06/04/2009:svnTOSHIBA:pnSatelliteL300:pvrPSLB8E-15E00PGE:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
+ dmi.product.name: Satellite L300
+ dmi.product.version: PSLB8E-15E00PGE
+ dmi.sys.vendor: TOSHIBA

** Attachment added: "AlsaDevices.txt"
   http://launchpadlibrarian.net/50674594/AlsaDevices.txt

-- 
Slow CIFS navigation
https://bugs.launchpad.net/bugs/571235
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