* UDF filesystem has some bugs on truncating
@ 2006-06-16 5:47 colin
2006-06-17 14:42 ` Alan Cox
2006-06-19 9:32 ` Alan Cox
0 siblings, 2 replies; 4+ messages in thread
From: colin @ 2006-06-16 5:47 UTC (permalink / raw)
To: linux-kernel
Hi all,
I found that UDF has bugs on truncating.
When you do this:
dd if=/dev/zero of=aaa bs=1024k count=2 seek=3000
, Linux will hang and die.
The platform is Linux 2.6.16 on MIPS malta board.
Regards,
Colin
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: UDF filesystem has some bugs on truncating
2006-06-16 5:47 UDF filesystem has some bugs on truncating colin
@ 2006-06-17 14:42 ` Alan Cox
2006-06-19 9:32 ` Alan Cox
1 sibling, 0 replies; 4+ messages in thread
From: Alan Cox @ 2006-06-17 14:42 UTC (permalink / raw)
To: colin; +Cc: linux-kernel
Ar Gwe, 2006-06-16 am 13:47 +0800, ysgrifennodd colin:
> Hi all,
> I found that UDF has bugs on truncating.
> When you do this:
> dd if=/dev/zero of=aaa bs=1024k count=2 seek=3000
> , Linux will hang and die.
I'm unable to duplicate this on x86-64, do you have more information, eg
backtraces ?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: UDF filesystem has some bugs on truncating
2006-06-16 5:47 UDF filesystem has some bugs on truncating colin
2006-06-17 14:42 ` Alan Cox
@ 2006-06-19 9:32 ` Alan Cox
2006-06-20 4:37 ` colin
1 sibling, 1 reply; 4+ messages in thread
From: Alan Cox @ 2006-06-19 9:32 UTC (permalink / raw)
To: colin; +Cc: linux-kernel
Ar Gwe, 2006-06-16 am 13:47 +0800, ysgrifennodd colin:
> Hi all,
> I found that UDF has bugs on truncating.
> When you do this:
> dd if=/dev/zero of=aaa bs=1024k count=2 seek=3000
> , Linux will hang and die.
> The platform is Linux 2.6.16 on MIPS malta board.
Ok I eventually sort of reproduced this on x86-64. It took a while
because in my environment I see a crash 2 or 3 hours after the test is
run, and that crash is on hardware that doesn't otherwise crash and
seems to be repeatable.
Alan
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: UDF filesystem has some bugs on truncating
2006-06-19 9:32 ` Alan Cox
@ 2006-06-20 4:37 ` colin
0 siblings, 0 replies; 4+ messages in thread
From: colin @ 2006-06-20 4:37 UTC (permalink / raw)
To: Alan Cox; +Cc: linux-kernel
Hi Alan,
Do you use the same command with me?
The parameter "seek" of "dd if=/dev/zero of=aaa bs=1024k count=2 seek=3000"
will inform "dd" to use truncate system call to expand file in no time.
In normal situations, the file will grow up to 3G in about 2 seconds.
This dd command on ext3 partition can run very well on my platform, but it
will fail on UDF partition.
Regards,
Colin
----- Original Message -----
From: "Alan Cox" <alan@lxorguk.ukuu.org.uk>
To: "colin" <colin@realtek.com.tw>
Cc: <linux-kernel@vger.kernel.org>
Sent: Monday, June 19, 2006 5:32 PM
Subject: Re: UDF filesystem has some bugs on truncating
> Ar Gwe, 2006-06-16 am 13:47 +0800, ysgrifennodd colin:
> > Hi all,
> > I found that UDF has bugs on truncating.
> > When you do this:
> > dd if=/dev/zero of=aaa bs=1024k count=2 seek=3000
> > , Linux will hang and die.
> > The platform is Linux 2.6.16 on MIPS malta board.
>
> Ok I eventually sort of reproduced this on x86-64. It took a while
> because in my environment I see a crash 2 or 3 hours after the test is
> run, and that crash is on hardware that doesn't otherwise crash and
> seems to be repeatable.
>
> Alan
>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-06-20 4:37 UTC | newest]
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2006-06-16 5:47 UDF filesystem has some bugs on truncating colin
2006-06-17 14:42 ` Alan Cox
2006-06-19 9:32 ` Alan Cox
2006-06-20 4:37 ` colin
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