Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-25 Thread 萩尾　一仁
-Original Message- > 在 2021年04月23日 17:44, HAGIO KAZUHITO(萩尾　一仁) 写道: > > -Original Message- > >>> As for the 'write_expire' way, I found that it can be printed after > >>> "set scope dd_init_queue" or "set scope deadline_init_queue" on old > >>> kernels. > >>> > >>> crash> p write_e

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-25 Thread lijiang
在 2021年04月23日 17:44, HAGIO KAZUHITO(萩尾　一仁) 写道: > -Original Message- >>> As for the 'write_expire' way, I found that it can be printed after >>> "set scope dd_init_queue" or "set scope deadline_init_queue" on old kernels. >>> >>> crash> p write_expire >>> No symbol "write_expire" in current

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-23 Thread 萩尾　一仁
-Original Message- > > As for the 'write_expire' way, I found that it can be printed after > > "set scope dd_init_queue" or "set scope deadline_init_queue" on old kernels. > > > > crash> p write_expire > > No symbol "write_expire" in current context. > > p: gdb request failed: p write_expir

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-23 Thread lijiang
在 2021年04月23日 15:08, HAGIO KAZUHITO(萩尾　一仁) 写道: >> -Original Message- >>> Sure. On my ppc64le machine, crash got 96hz after applying the above patch. >>> The reason >>> is that kernel calculates the value of bfq_timeout as below: >>> >>> bfq_timeout = HZ / 8; >>> >>> The actual value of HZ

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-23 Thread lijiang
在 2021年04月23日 14:41, lijiang 写道: > 在 2021年04月22日 22:26, lijiang 写道: >> 在 2021年04月22日 17:33, HAGIO KAZUHITO(萩尾　一仁) 写道: >>> -Original Message- -Original Message- > 在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: >> Hi Bhupesh, >> >> -Original Message- >

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-23 Thread 萩尾　一仁
> -Original Message- > > Sure. On my ppc64le machine, crash got 96hz after applying the above patch. > > The reason > > is that kernel calculates the value of bfq_timeout as below: > > > > bfq_timeout = HZ / 8; > > > > The actual value of HZ is 100, so bfq_timeout = 100 / 8 = 12, but in cr

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-22 Thread lijiang
在 2021年04月22日 22:26, lijiang 写道: > 在 2021年04月22日 17:33, HAGIO KAZUHITO(萩尾　一仁) 写道: >> -Original Message- >>> -Original Message- 在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: > Hi Bhupesh, > > -Original Message- >> We have hard-coded the HZ value for some

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-22 Thread lijiang
在 2021年04月22日 17:33, HAGIO KAZUHITO(萩尾　一仁) 写道: > -Original Message- >> -Original Message- >>> 在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: Hi Bhupesh, -Original Message- > We have hard-coded the HZ value for some ARCHs to either 1000 or 100 > (mainly

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-22 Thread 萩尾　一仁
-Original Message- > -Original Message- > > 在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: > > > Hi Bhupesh, > > > > > > -Original Message- > > >> We have hard-coded the HZ value for some ARCHs to either 1000 or 100 > > >> (mainly for kernel versions > 2.6.0), which causes '

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-21 Thread 萩尾　一仁
-Original Message- > 在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: > > Hi Bhupesh, > > > > -Original Message- > >> We have hard-coded the HZ value for some ARCHs to either 1000 or 100 > >> (mainly for kernel versions > 2.6.0), which causes 'help -m' to show > >> an incorrect hz val

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-04-20 Thread lijiang
在 2021年01月12日 16:24, HAGIO KAZUHITO(萩尾　一仁) 写道: > Hi Bhupesh, > > -Original Message- >> We have hard-coded the HZ value for some ARCHs to either 1000 or 100 >> (mainly for kernel versions > 2.6.0), which causes 'help -m' to show >> an incorrect hz value for various architectures. > > Good

Re: [Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-01-12 Thread 萩尾　一仁
Hi Bhupesh, -Original Message- > We have hard-coded the HZ value for some ARCHs to either 1000 or 100 > (mainly for kernel versions > 2.6.0), which causes 'help -m' to show > an incorrect hz value for various architectures. Good catch. but seems crash uses (cfq_slice_async * 25) for mach

[Crash-utility] [PATCH] Fix machdep->HZ calculation for kernel versions > 2.6.0

2021-01-11 Thread Bhupesh Sharma
We have hard-coded the HZ value for some ARCHs to either 1000 or 100 (mainly for kernel versions > 2.6.0), which causes 'help -m' to show an incorrect hz value for various architectures. I tested this on ppc64le and x86_64 and the hz value reported is 1000, whereas the kernel CONFIG_HZ_100 is set