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SubjectRe: [patch 0/7] Add TRIM support for raid linear/0/1/10
From
2012/3/13 Holger Kiehl <Holger.Kiehl@dwd.de>:
> On Tue, 13 Mar 2012, Shaohua Li wrote:
>
>> On 3/13/12 2:22 AM, Holger Kiehl wrote:
>> > Hello,
>> >
>> > On Mon, 12 Mar 2012, Shaohua Li wrote:
>> >
>> >> The patches add TRIM support for raid linear/0/1/10. I'll add TRIM
>> support for
>> >> raid 4/5/6 later. The implementation is pretty straightforward and
>> >> self-explained.
>> >>
>> > First, thanks for this patch!
>> >
>> > I have applied those patches against 3.3.0-rc7 and during boot the
>> > kernel
>> > reports a lot of the following:
>> >
>> > Mar 12 18:56:00 c3po kernel: [ 7.611045] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18861064 512
>> > Mar 12 18:56:00 c3po kernel: [ 7.611047] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18862088 512
>> > Mar 12 18:56:00 c3po kernel: [ 7.611049] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18863112 512
>> > Mar 12 18:56:00 c3po kernel: [ 7.611052] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18864136 512
>> > Mar 12 18:56:00 c3po kernel: [ 7.611054] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18865160 512
>> > Mar 12 18:56:00 c3po kernel: [ 7.611056] md/raid0:md3: make_request bug:
>> can't convert block across chunks or bigger than 512k 18866184 512
>> Looks our SMTP server does something stupid. Sorry if you get two copies
>> of the mail.
>>
>> Thanks for testing. Looks I fixed a sanity check in bio.c but there are
>> similar check in raid0/10 which I forgot to fix. Below patch should fix
>> it.
>> please try.
>>
> Now I get following messages during boot (and it takes a very long time):
>
>   Mar 13 10:23:25 c3po kernel: [  251.355041]   bio ffff88019e0abc70,
> biotail ffff88019e0ddc00, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.355052] request botched: dev sdb:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.355054]   sector 52929353, nr/cnr 0/8
>   Mar 13 10:23:25 c3po kernel: [  251.355055]   bio ffff88019e0aba70,
> biotail ffff88019e0dda00, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.355068] request botched: dev sdc:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.355069]   sector 52929346, nr/cnr
> 0/1016
>   Mar 13 10:23:25 c3po kernel: [  251.355071]   bio ffff88019e0aae00,
> biotail ffff88019e0db380, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.373583] request botched: dev sda:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.373585]   sector 52929354, nr/cnr
> 0/1016
>   Mar 13 10:23:25 c3po kernel: [  251.373587]   bio ffff88019e0aba00,
> biotail ffff88019e0ddc00, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.373597] request botched: dev sdb:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.373599]   sector 52929354, nr/cnr
> 0/1016
>   Mar 13 10:23:25 c3po kernel: [  251.373600]   bio ffff88019e0ab800,
> biotail ffff88019e0dda00, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.373612] request botched: dev sdc:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.373614]   sector 52929347, nr/cnr 0/8
>   Mar 13 10:23:25 c3po kernel: [  251.373616]   bio ffff88019e0aaa70,
> biotail ffff88019e0db380, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.392135] request botched: dev sda:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.392137]   sector 52929355, nr/cnr 0/8
>   Mar 13 10:23:25 c3po kernel: [  251.392139]   bio ffff88019e0ab670,
> biotail ffff88019e0ddc00, buffer           (null), len 0
>   Mar 13 10:23:25 c3po kernel: [  251.392150] request botched: dev sdb:
> type=1, flags=916c081
>   Mar 13 10:23:25 c3po kernel: [  251.392152]   sector 52929355, nr/cnr 0/8
>   Mar 13 10:23:25 c3po kernel: [  251.392153]   bio ffff88019e0ab470,
> biotail ffff88019e0dda00, buffer           (null), len 0
>
> After boot the system runs fine, but as soon as I do something (make clean
> of
> kernel tree with a sync) I get the same messages as above and it takes a
> long time to sync:
>
>   Mar 13 10:44:59 c3po kernel: [ 1550.740528] request botched: dev sda:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.740533]   sector 12580617, nr/cnr
> 0/776
>   Mar 13 10:44:59 c3po kernel: [ 1550.740537]   bio ffff8801a362b670,
> biotail ffff8801a30f3d80, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.747141] request botched: dev sdb:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.747144]   sector 12579841, nr/cnr
> 0/248
>   Mar 13 10:44:59 c3po kernel: [ 1550.747148]   bio ffff88019e0dd200,
> biotail ffff88019e0dd200, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.749429] request botched: dev sdc:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.749432]   sector 12579841, nr/cnr
> 0/248
>   Mar 13 10:44:59 c3po kernel: [ 1550.749436]   bio ffff8801a362b600,
> biotail ffff8801a362b600, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.755332] request botched: dev sda:
> type=1, flags=916c081
>   Mar 13 10:44:59 c3po kernel: [ 1550.755335]   sector 12580618, nr/cnr
> 0/248
>   Mar 13 10:44:59 c3po kernel: [ 1550.755339]   bio ffff8801a30f3d80,
> biotail ffff8801a30f3d80, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.806832] request botched: dev sdb:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.806836]   sector 12266497, nr/cnr
> 0/1000
>   Mar 13 10:44:59 c3po kernel: [ 1550.806840]   bio ffff8801a4dca800,
> biotail ffff88019e0c9000, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.811972] request botched: dev sda:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.811976]   sector 12266497, nr/cnr
> 0/1000
>   Mar 13 10:44:59 c3po kernel: [ 1550.811979]   bio ffff88019e0dd200,
> biotail ffff8801a3794000, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.814081] request botched: dev sdc:
> type=1, flags=9164081
>   Mar 13 10:44:59 c3po kernel: [ 1550.814084]   sector 12265497, nr/cnr 0/24
>   Mar 13 10:44:59 c3po kernel: [ 1550.814087]   bio ffff8801a4dca870,
> biotail ffff8801a37f4080, buffer           (null), len 0
>   Mar 13 10:44:59 c3po kernel: [ 1550.819150] request botched: dev sdc:
> type=1, flags=916c081
>   Mar 13 10:44:59 c3po kernel: [ 1550.819153]   sector 12265498, nr/cnr
> 0/1000
>
> Please give me any hints what I can try next.
Thanks for testing. This is very wield, the req->__data_len is wrong.
Is this a clean build?
didn't success to reproduce it, will check tomorrow again.

Thanks,
Shaohua
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