[haiku-bugs] Re: [Haiku] #10637: memory issue with mounted image files
- From: "jessicah" <trac@xxxxxxxxxxxx>
- Date: Tue, 04 Mar 2014 11:03:28 -0000
#10637: memory issue with mounted image files
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Reporter: jessicah | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by jessicah):
Possibly a problem with the file cache not attempting to commit writes
early enough? Can be reproduced fairly easily using dd if=/dev/urandom
of=file.of.junk bs=1M count=8192 and watching the cache consistently climb
with no apparent effort to empty it. Changing the dd line, adding
oflag=direct appears to do the correct thing and bypass the cache
altogether, and things hum along quite nicely in this particular instance.
And it's not a write speed issue either. It simply doesn't do any writing.
The speeds I get using dd with the direct flag are similar if not the same
as without the direct flag and simply writing to cache.
Given the behaviour with dd filling up the cache, I would suspect my
issues with the mounted bfs image file are eerily similar.
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Ticket URL: <https://dev.haiku-os.org/ticket/10637#comment:2>
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