From mboxrd@z Thu Jan 1 00:00:00 1970 From: rppt@linux.ibm.com (Mike Rapoport) Date: Thu, 26 Sep 2019 19:04:34 +0300 Subject: [PATCH v2 00/21] Refine memblock API In-Reply-To: References: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com> List-ID: Message-ID: <20190926160433.GD32311@linux.ibm.com> To: linux-snps-arc@lists.infradead.org Hi, On Thu, Sep 26, 2019@08:09:52AM -0500, Adam Ford wrote: > On Wed, Sep 25, 2019@10:17 AM Fabio Estevam wrote: > > > > On Wed, Sep 25, 2019@9:17 AM Adam Ford wrote: > > > > > I tried cma=256M and noticed the cma dump at the beginning didn't > > > change. Do we need to setup a reserved-memory node like > > > imx6ul-ccimx6ulsom.dtsi did? > > > > I don't think so. > > > > Were you able to identify what was the exact commit that caused such regression? > > I was able to narrow it down the 92d12f9544b7 ("memblock: refactor > internal allocation functions") that caused the regression with > Etnaviv. Can you please test with this change: diff --git a/mm/memblock.c b/mm/memblock.c index 7d4f61a..1f5a0eb 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1356,9 +1356,6 @@ static phys_addr_t __init memblock_alloc_range_nid(phys_addr_t size, align = SMP_CACHE_BYTES; } - if (end > memblock.current_limit) - end = memblock.current_limit; - again: found = memblock_find_in_range_node(size, align, start, end, nid, flags); > I also noticed that if I create a reserved memory node as was done one > imx6ul-ccimx6ulsom.dtsi the 3D seems to work again, but without it, I > was getting errors regardless of the 'cma=256M' or not. > I don't have a problem using the reserved memory, but I guess I am not > sure what the amount should be. I know for the video decoding 1080p, > I have historically used cma=128M, but with the 3D also needing some > memory allocation, is that enough or should I use 256M? > > adam -- Sincerely yours, Mike.