63 bit masking will cause double buffering of data ?
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Title:
IO's are issued with incorrect Scatter Gather Buffer
Status in linux
Just would like to understand more about the system behavior when we
change the DMA Mask from 64 bit to 63 bit
do we expect any double buffering ?
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Yes , It seems that bug is still not fixed
FYI - We also observed page fault in 4.18 kernel
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Title:
IO's are issued with incorrect
Yes below 4.18 kernel (which is 4.15) fixes only with increased memory
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Title:
IO's are issued with incorrect Scatter Gather Buffer
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201332/+files/Lspci.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201333/+files/Lsusb.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201330/+files/CRDA.txt
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> Also another version (other than default version of Ubuntu 18.04.01)
of 4.15 kernel fixes the issue
Can you share this kernel version as well?
Actually adding additional memory to the system which has
4.15.0-34-generic kernel fixes the issue , not the different version of
4.15 kernel fixes the
apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201334/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "AlsaInfo.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201329/+files/AlsaInfo.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201338/+files/UdevDb.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201324/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201322/+files/Lsusb.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201315/+files/ProcInterrupts.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201319/+files/CRDA.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201314/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201312/+files/Lsusb.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201320/+files/CurrentDmesg.txt
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apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201325/+files/ProcInterrupts.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201317/+files/UdevDb.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201316/+files/ProcModules.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201318/+files/WifiSyslog.txt
** Description changed:
We have observed that OS is sending the IO's (SCSI Read/Write) with incorrect
Scatter Gather Buffer address .
i.e
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201321/+files/Lspci.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201326/+files/ProcModules.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201323/+files/ProcCpuinfo.txt
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You received this bug notification because you are a member of Kernel
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201327/+files/UdevDb.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201339/+files/WifiSyslog.txt
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You received this bug notification because you are a member of Kernel
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201331/+files/CurrentDmesg.txt
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201335/+files/ProcCpuinfoMinimal.txt
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You received this bug notification because you are a member of Kernel
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201328/+files/WifiSyslog.txt
** Description changed:
We have observed that OS is sending the IO's (SCSI Read/Write) with incorrect
Scatter Gather Buffer address .
i.e
apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201336/+files/ProcInterrupts.txt
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201337/+files/ProcModules.txt
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apport information
** Tags added: apport-collected uec-images
** Description changed:
We have observed that OS is sending the IO's (SCSI Read/Write) with incorrect
Scatter Gather Buffer address .
i.e
OS is sending the IO with 64 bit Scatter Gather Buffer address , such
that
apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201311/+files/Lspci.txt
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1795453
apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201310/+files/CurrentDmesg.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1795453/+attachment/5201313/+files/ProcCpuinfo.txt
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Issue reported Kernel Version
-
4.15.0-34-generic
Issue resolved Kernel Version
-
4.18.0-8-generic
Linux user 4.18.0-8-generic #9~18.04.1-Ubuntu SMP Mon Sep 17
12:49:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
It looks
It will be good if you could provide us the exact commit (Patch) which
fixes the issue
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Title:
IO's are issued with incorrect
Also another version (other than default version of Ubuntu 18.04.01) of
4.15 kernel fixes the issue
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Title:
IO's are issued with
Looks like the issue is not seen with 4.18 kernel , please let me know
still Ubuntu requires the log with 4.15 kernel ?
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Title:
we are in the process of collecting logs
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Title:
IO's are issued with incorrect Scatter Gather Buffer
Status in linux package in
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