Re: mm: mkfs.ext4 invoked oom-killer on i386 - pagecache_get_page

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Jun 18, 2020 at 8:37 PM Chris Down <chris@xxxxxxxxxxxxxx> wrote:
>
> Yafang Shao writes:
> >On Thu, Jun 18, 2020 at 5:09 AM Chris Down <chris@xxxxxxxxxxxxxx> wrote:
> >>
> >> Naresh Kamboju writes:
> >> >After this patch applied the reported issue got fixed.
> >>
> >> Great! Thank you Naresh and Michal for helping to get to the bottom of this :-)
> >>
> >> I'll send out a new version tomorrow with the fixes applied and both of you
> >> credited in the changelog for the detection and fix.
> >
> >As we have already found that the usage around memory.{emin, elow} has
> >many limitations, I think memory.{emin, elow} should be used for
> >memcg-tree internally only, that means they can only be used to
> >calculate the protection of a memcg in a specified memcg-tree but
> >should not be exposed to other MM parts.
>
> I agree that the current semantics are mentally taxing and we should generally
> avoid exposing the implementation details outside of memcg where possible. Do
> you have a suggested rework? :-)

Keeping the mem_cgroup_protected() as-is is my suggestion. Anyway I
think it is bad to put memory.{emin, elow} here and there.
If we don't have any better idea by now, just putting all the
references of memory.{emin, elow}  into one
wrapper(mem_cgroup_protected()) is the reasonable solution.

-- 
Thanks
Yafang



[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux