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Fix #5048

closed

krbd: limit of ~230 mapped images at once

Added by Sage Weil almost 11 years ago. Updated over 10 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Ilya Dryomov
Target version:
v0.75
% Done:

0%

Source:
other
Tags:
Backport:
Reviewed:
Affected Versions:
ceph-qa-suite:
Pull request ID:
Crash signature (v1):
Crash signature (v2):

Description

this is just because we are using our major/minor device ids in a stupid way, iirc.

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 #1

Updated by Nathan O'Sullivan over 10 years ago

A user on IRC had a problem with iostat related to this:

  1. iostat
    [snip]
    rbd3 0.02 0.07 0.00 676 0
    emcpowerig 0.02 0.07 0.00 676 0
  1. cat /proc/diskstats
    [snip]
    248 0 rbd3 169 0 1352 104 0 0 0 0 0 104 104
    247 0 rbd4 169 0 1352 100 0 0 0 0 0 100 100

Both 'emcpowerig' and rbd4 were using 247:0 , resulting in iostat giving weird output. This would not have happened if RBD incremented the minor device ID instead of decrementing the major.

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 #2

Updated by Sage Weil over 10 years ago

  • Tracker changed from Bug to Fix
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 #3

Updated by Sage Weil over 10 years ago

  • Target version set to v0.75
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 #4

Updated by Sage Weil over 10 years ago

  • Status changed from New to In Progress
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 #5

Updated by Sage Weil over 10 years ago

  • Assignee set to Ilya Dryomov
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 #6

Updated by Sage Weil over 10 years ago

  • Status changed from In Progress to Resolved
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