Re: Fwd: Current State of BTRFS
@Leonidas: I don't think so ... this is running on a i7 core and lzo
is pretty damn fast.
2013/2/11 Leonidas Spyropoulos :
> On Mon, Feb 11, 2013 at 4:05 PM, Josef Bacik wrote:
>> On Fri, Feb 08, 2013 at 04:12:17PM -0700, Florian Hofmann wrote:
>>> I ran it as root. The first times there was no output whatsoever. This
>>> time triggering gave the SysRq : Show Blocked State line. Strange
>>>
>>
>> Well that's weird, it looks like you don't have any blocked tasks, so either
>> sysrq+w is screwing up or you are getting stuck in something CPU intensive.
>> Try
>> doing sysrq+w next time it happens again and also run top and see if
>> something
>> is using up 100% of the CPU. If it's something chewing up CPU then I'll tell
>> you how to figure out what's going on. Thanks,
>>
> I noticed you have the FS mounted with compress flag (compress=lzo).
> Could it be that your CPU is bottle-necking the process?
>
>> Josef
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>
>
>
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Re: Fwd: Current State of BTRFS
(Sadly) No SSD. I just upgraded from kernel version 3.7.5 to 3.7.6 (running Arch Linux) with no change in behavior. 2013/2/9 Marc MERLIN : > On Fri, Feb 08, 2013 at 10:30:04PM +0100, Florian Hofmann wrote: >> Hi everybody, >> >> I am using btrfs as my main fs for some time now, but I am >> experiencing severe performance drawbacks. I can't qualify the >> circumstances, but sometimes during disc access the whole system >> freezes for some time. >> >> Maybe somebody could suggest some general things I could try to search >> for the problem? > > Are you running on an SSD? > > If so, that is likely your problem. > > Depending on your SSD: > - it's going bad > - it's running out of blocks to reallocate, or being very slow > - other firmware issue > > Marc > -- > "A mouse is a device used to point at the xterm you want to type in" - A.S.R. > Microsoft is to operating systems > what McDonalds is to gourmet > cooking > Home page: http://marc.merlins.org/ 2013/2/9 Marc MERLIN : > On Fri, Feb 08, 2013 at 10:30:04PM +0100, Florian Hofmann wrote: >> Hi everybody, >> >> I am using btrfs as my main fs for some time now, but I am >> experiencing severe performance drawbacks. I can't qualify the >> circumstances, but sometimes during disc access the whole system >> freezes for some time. >> >> Maybe somebody could suggest some general things I could try to search >> for the problem? > > Are you running on an SSD? > > If so, that is likely your problem. > > Depending on your SSD: > - it's going bad > - it's running out of blocks to reallocate, or being very slow > - other firmware issue > > Marc > -- > "A mouse is a device used to point at the xterm you want to type in" - A.S.R. > Microsoft is to operating systems > what McDonalds is to gourmet > cooking > Home page: http://marc.merlins.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fwd: Current State of BTRFS
I ran it as root. The first times there was no output whatsoever. This time triggering gave the SysRq : Show Blocked State line. Strange 2013/2/9 cwillu : > On Fri, Feb 8, 2013 at 4:56 PM, Florian Hofmann > wrote: >> Oh ... I should have mentioned that btrfs is running on top of LUKS. >> >> 2013/2/8 Florian Hofmann : >>> $ btrfs fi df / >>> Data: total=165.00GB, used=164.19GB >>> System, DUP: total=32.00MB, used=28.00KB >>> System: total=4.00MB, used=0.00 >>> Metadata, DUP: total=2.00GB, used=1.40GB >>> >>> $ btrfs fi show >>> failed to read /dev/sr0 >>> Label: none uuid: b4ec0b14-2a42-47e3-a0cd-1257e789ed25 >>> Total devices 1 FS bytes used 165.59GB >>> devid1 size 600.35GB used 169.07GB path /dev/dm-0 >>> >>> Btrfs Btrfs v0.19 >>> >>> --- >>> >>> I just noticed that I can force 'it' by transferring a large file from >>> my NAS. I did the sysrq-trigger thing, but there is no suspicious >>> output in dmesg (http://pastebin.com/swrCdC3U). >>> >>> Anything else? > > The pastebin didn't include any output from sysrq-w; even if there's > nothing to report there would still be a dozen lines or so per cpu; at > the absolute minimum there should be a line for each time you ran it: > > [4477369.680307] SysRq : Show Blocked State > > Note that you need to echo as root, or use the keyboard combo > alt-sysrq-w to trigger. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fwd: Current State of BTRFS
I just had another big freeze ... I could change to a terminal and sysrq-triggering gave this: http://pastebin.com/F1jQqtUQ 2013/2/8 Florian Hofmann : > Oh ... I should have mentioned that btrfs is running on top of LUKS. > > 2013/2/8 Florian Hofmann : >> $ btrfs fi df / >> Data: total=165.00GB, used=164.19GB >> System, DUP: total=32.00MB, used=28.00KB >> System: total=4.00MB, used=0.00 >> Metadata, DUP: total=2.00GB, used=1.40GB >> >> $ btrfs fi show >> failed to read /dev/sr0 >> Label: none uuid: b4ec0b14-2a42-47e3-a0cd-1257e789ed25 >> Total devices 1 FS bytes used 165.59GB >> devid1 size 600.35GB used 169.07GB path /dev/dm-0 >> >> Btrfs Btrfs v0.19 >> >> --- >> >> I just noticed that I can force 'it' by transferring a large file from >> my NAS. I did the sysrq-trigger thing, but there is no suspicious >> output in dmesg (http://pastebin.com/swrCdC3U). >> >> Anything else? >> >> 2013/2/8 Josef Bacik : >>> On Fri, Feb 08, 2013 at 02:30:04PM -0700, Florian Hofmann wrote: >>>> Hi everybody, >>>> >>>> I am using btrfs as my main fs for some time now, but I am >>>> experiencing severe performance drawbacks. I can't qualify the >>>> circumstances, but sometimes during disc access the whole system >>>> freezes for some time. >>>> >>>> Maybe somebody could suggest some general things I could try to search >>>> for the problem? >>> >>> Can I see >>> >>> btrfs fi df /mnt/point >>> btrfs fi show >>> >>> and then when you are having problems >>> >>> echo w > /proc/sysrq-trigger >>> >>> and capture dmesg. Thanks, >>> >>> Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fwd: Current State of BTRFS
Oh ... I should have mentioned that btrfs is running on top of LUKS. 2013/2/8 Florian Hofmann : > $ btrfs fi df / > Data: total=165.00GB, used=164.19GB > System, DUP: total=32.00MB, used=28.00KB > System: total=4.00MB, used=0.00 > Metadata, DUP: total=2.00GB, used=1.40GB > > $ btrfs fi show > failed to read /dev/sr0 > Label: none uuid: b4ec0b14-2a42-47e3-a0cd-1257e789ed25 > Total devices 1 FS bytes used 165.59GB > devid1 size 600.35GB used 169.07GB path /dev/dm-0 > > Btrfs Btrfs v0.19 > > --- > > I just noticed that I can force 'it' by transferring a large file from > my NAS. I did the sysrq-trigger thing, but there is no suspicious > output in dmesg (http://pastebin.com/swrCdC3U). > > Anything else? > > 2013/2/8 Josef Bacik : >> On Fri, Feb 08, 2013 at 02:30:04PM -0700, Florian Hofmann wrote: >>> Hi everybody, >>> >>> I am using btrfs as my main fs for some time now, but I am >>> experiencing severe performance drawbacks. I can't qualify the >>> circumstances, but sometimes during disc access the whole system >>> freezes for some time. >>> >>> Maybe somebody could suggest some general things I could try to search >>> for the problem? >> >> Can I see >> >> btrfs fi df /mnt/point >> btrfs fi show >> >> and then when you are having problems >> >> echo w > /proc/sysrq-trigger >> >> and capture dmesg. Thanks, >> >> Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Fwd: Current State of BTRFS
$ btrfs fi df / Data: total=165.00GB, used=164.19GB System, DUP: total=32.00MB, used=28.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=2.00GB, used=1.40GB $ btrfs fi show failed to read /dev/sr0 Label: none uuid: b4ec0b14-2a42-47e3-a0cd-1257e789ed25 Total devices 1 FS bytes used 165.59GB devid1 size 600.35GB used 169.07GB path /dev/dm-0 Btrfs Btrfs v0.19 --- I just noticed that I can force 'it' by transferring a large file from my NAS. I did the sysrq-trigger thing, but there is no suspicious output in dmesg (http://pastebin.com/swrCdC3U). Anything else? 2013/2/8 Josef Bacik : > On Fri, Feb 08, 2013 at 02:30:04PM -0700, Florian Hofmann wrote: >> Hi everybody, >> >> I am using btrfs as my main fs for some time now, but I am >> experiencing severe performance drawbacks. I can't qualify the >> circumstances, but sometimes during disc access the whole system >> freezes for some time. >> >> Maybe somebody could suggest some general things I could try to search >> for the problem? > > Can I see > > btrfs fi df /mnt/point > btrfs fi show > > and then when you are having problems > > echo w > /proc/sysrq-trigger > > and capture dmesg. Thanks, > > Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
