On Fri, Mar 08, 2019 at 03:34:18PM +0800, wuzhouhui wrote:
> > -Original Messages-
> > From: "Greg KH"
> > Sent Time: 2019-03-08 15:21:52 (Friday)
> > To: wuzhouhui
> > Cc: kernelnewbies@kernelnewbies.org
> > Subject: Re: How to avoid or reduce GFP_ATOMIC allocation failed
> >
> > On Fri
> -Original Messages-
> From: "Greg KH"
> Sent Time: 2019-03-08 15:21:52 (Friday)
> To: wuzhouhui
> Cc: kernelnewbies@kernelnewbies.org
> Subject: Re: How to avoid or reduce GFP_ATOMIC allocation failed
>
> On Fri, Mar 08, 2019 at 01:37:26PM +0800, wuzhouhui wrote:
> > Hi,
> >
> > I che
On Fri, Mar 08, 2019 at 01:37:26PM +0800, wuzhouhui wrote:
> Hi,
>
> I check kernel code and found that GFP_ATOMIC allocation will
> use emergency pool and maybe failed if emergency pool is not
> enough. And GFP_ATOMIC doesn't trigger reclaim (because of
> ATOMIC) even if there are a lot of page c
Hi,
I check kernel code and found that GFP_ATOMIC allocation will
use emergency pool and maybe failed if emergency pool is not
enough. And GFP_ATOMIC doesn't trigger reclaim (because of
ATOMIC) even if there are a lot of page caches. So my question
is how to avoid or reduce GFP_ATOMIC allocation f
The issue is not easy to reproduce.
unable to reproduce that even after many retries.
On Thu, Mar 7, 2019 at 2:30 PM wrote:
> On Wed, 06 Mar 2019 17:20:07 +0530, prashantkumar dhotre said:
>
> > Could you please let me know if any system call can exit with 251 ?
> > I am trying to find out who
Hi Greg,
OK, thanks. I will ask there.
As for the system yes, we are using this module as a host.
Cheers,
Radek
-Ursprüngliche Nachricht-
Von: Greg KH
Gesendet: czwartek, 7 marca 2019 12:53
An: CHMIELARZ Radoslaw
Cc: kernelnewbies@kernelnewbies.org
Betreff: Re: Using EHSET module
On
On Thu, Mar 07, 2019 at 11:41:58AM +, CHMIELARZ Radoslaw wrote:
> Hi,
>
> I'm trying to certify USB on our device that is running Linux 4.14.
> For windows systems we were using https://www.usb.org/usb2tools. For
> linux the only option I have found is a kernel module called EHSET.
> Unfortuna
Hi,
I'm trying to certify USB on our device that is running Linux 4.14. For windows
systems we were using https://www.usb.org/usb2tools. For linux the only option
I have found is a kernel module called EHSET. Unfortunately I can't manage to
get it working, can You please help?
I have added the
On Wed, 06 Mar 2019 17:20:07 +0530, prashantkumar dhotre said:
> Could you please let me know if any system call can exit with 251 ?
> I am trying to find out who exited with 251 ?
strace is your friend.
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On Wed, 06 Mar 2019 03:50:10 -0500, Jeffrey Walton said:
> Yeah, the race seems to be the downside to ioctl and TIOEXCL.
>
> It is too bad Linux does not honor O_EXCL for the device, or provide a
> similar open flag like SOCK_NONBLOCK was added to avoid the race in
> sockets. It would avoid a lot
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