On (12/01/15 16:15), Sergey Senozhatsky wrote:
> On (12/01/15 15:35), Kyeongdon Kim wrote:
> [..]
> > @test #4
> > kmalloc(f)
> > __vmalloc(f)
> > // cannot find failure both until now
> >
> > log message (test #4) :
> > <4>[ 641.440468][7] KDKIM: zcomp_lz4_create: 24: ret = ffffffc002190000
> > <snip>
> > <4>[ 922.182980][7] KDKIM: zcomp_lz4_create: 24: ret = ffffffc002208000
> > <snip>
> > <4>[ 923.197593][7] KDKIM: zcomp_lz4_create: 24: ret = ffffffc002020000
> > <snip>
> > <4>[ 939.813499][7] KDKIM: zcomp_lz4_create: 24: ret = ffffffc0020a0000
>
> Thanks!
>
> > So,is there another problem if we remove the flag from both sides?
> >
>
> Technically, '~__GFP_NOMEMALLOC' is what we've been doing for some time (well,
> always); and, as Minchan noted, zsmalloc does not depend on emergency pools.
>
> I vote for removal of __GFP_NOMEMALLOC from both kmalloc() and __vmalloc().
>
um.. which is very close to
"remove vmalloc() fallback and use kzalloc(f & ~__GFP_NOMEMALLOC) only"
-ss
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