Re: OOM at low page cache?

[John Moser <john.r.moser@gmail.com>]

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On 01/28/2015 07:36 AM, Rik van Riel wrote:
> On 01/28/2015 01:26 AM, Minchan Kim wrote:
> > Hello,
>
> > On Tue, Jan 27, 2015 at 12:03:34PM +0100, Vlastimil Babka wrote:
> >> CC linux-mm in case somebody has a good answer but missed this in
> >> lkml traffic
> >>
> >> On 01/23/2015 11:18 PM, John Moser wrote:
> >>> Why is there no tunable to OOM at low page cache?
>
> > AFAIR, there were several trial although there wasn't acceptable at
> > that time. One thing I can remember is min_filelist_kbytes. FYI,
> > http://lwn.net/Articles/412313/
>
> The Android low memory killer does exactly what you want, and
> for very much the same reasons.
>
> See drivers/staging/android/lowmemorykiller.c
>

Haven't seen that; it's been a long time since I bothered myself with
kernel code, so I'm out-of-touch.

Wow lots of good responses coming quick.
> However, in the mainline kernel I think it does make sense to
> apply something like the patch that Minchan cooked up with, to OOM
> if freeing all the page cache could not bring us back up to the high
> watermark, across all the memory zones.
>
>



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