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SubjectRe: [PATCH 2/3] mm: oom: show unreclaimable slab info when kernel panic

On 9/27/17 2:59 PM, Christopher Lameter wrote:
> On Thu, 28 Sep 2017, Yang Shi wrote:
>>> CONFIG_SLABINFO? How does this relate to the oom info? /proc/slabinfo
>>> support is optional. Oom info could be included even if CONFIG_SLABINFO
>>> goes away. Remove the #ifdef?
>> Because we want to dump the unreclaimable slab info in oom info.
> CONFIG_SLABINFO and /proc/slabinfo have nothing to do with the
> unreclaimable slab info.

The current design uses "struct slabinfo" and get_slabinfo() to retrieve
some info, i.e. active objs, etc. They are protected by CONFIG_SLABINFO.

We could replicate the logic in get_slabinfo without using struct
slabinfo, but it sounds not that necessary and CONFIG_SLABINFO is
typically enabled by default and it is not shown in menuconfig.



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