Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc()

From	Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc()
Date	2015-12-01 08:40 +0100
Message-ID	<qANHz-6Cu-9@gated-at.bofh.it> (permalink)
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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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Thread

Re: Re: Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() "kyeongdon.kim" <kyeongdon.kim@lge.com> - 2015-12-01 03:40 +0100
  Re: Re: Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Minchan Kim <minchan@kernel.org> - 2015-12-01 05:50 +0100
    Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-01 06:20 +0100
      Re: Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Kyeongdon Kim <kyeongdon.kim@lge.com> - 2015-12-01 07:40 +0100
        Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-01 08:20 +0100
          Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-01 08:40 +0100
          Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Minchan Kim <minchan@kernel.org> - 2015-12-01 09:20 +0100
            Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-01 10:20 +0100
        Re: [PATCH v3 2/2] zram: try vmalloc() after kmalloc() Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> - 2015-12-01 08:30 +0100

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