On (03/28/18 10:29), wen.yan...@zte.com.cn wrote:
>Hello Bart,
>
>We have a detailed discussion of the problem.
>Sergey Senozhatsky, Petr and many people have made a lot of efforts about
>it.
>Please see this link:
>https://bugzilla.kernel.org/show_bug.cgi?id=199003
>
>
On (03/28/18 10:29), wen.yan...@zte.com.cn wrote:
>Hello Bart,
>
>We have a detailed discussion of the problem.
>Sergey Senozhatsky, Petr and many people have made a lot of efforts about
>it.
>Please see this link:
>https://bugzilla.kernel.org/show_bug.cgi?id=199003
>
>
On Thu, 2018-03-08 at 16:50 +0800, Wen Yang wrote:
> When scsi disks went wrong frequently, and with serial console
> attached, tasks may be blocked in the following flow for more than 10s: [ ...
> ]
From https://bugzilla.kernel.org/show_bug.cgi?id=199003: "Hm,
printk_deferred is a bit
On Thu, 2018-03-08 at 16:50 +0800, Wen Yang wrote:
> When scsi disks went wrong frequently, and with serial console
> attached, tasks may be blocked in the following flow for more than 10s: [ ...
> ]
From https://bugzilla.kernel.org/show_bug.cgi?id=199003: "Hm,
printk_deferred is a bit
On Thu, 2018-03-08 at 16:50 +0800, Wen Yang wrote:
> This patch replacing the sdev_printk with async printk_deferred can
> avoid task blocking because of the slow serial and unstable disks in
> such senario.
Although I'm not enthusiast about this approach, I haven't been able to come
up with a
On Thu, 2018-03-08 at 16:50 +0800, Wen Yang wrote:
> This patch replacing the sdev_printk with async printk_deferred can
> avoid task blocking because of the slow serial and unstable disks in
> such senario.
Although I'm not enthusiast about this approach, I haven't been able to come
up with a
When scsi disks went wrong frequently, and with serial console
attached, tasks may be blocked in the following flow for more than 10s:
[ 557.369580] <> [] blkcg_print_blkgs+0x76/0xf0
》 wait for blkg->q->queue_lock
[ 557.369581] [] cfqg_print_rwstat_recursive+0x36/0x40
[ 557.369583]
When scsi disks went wrong frequently, and with serial console
attached, tasks may be blocked in the following flow for more than 10s:
[ 557.369580] <> [] blkcg_print_blkgs+0x76/0xf0
》 wait for blkg->q->queue_lock
[ 557.369581] [] cfqg_print_rwstat_recursive+0x36/0x40
[ 557.369583]
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