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Date: Sun, 19 Oct 2014 00:15:25 +0200 From: Pavel Machek <pavel@...x.de> To: Hui Zhu <zhuhui@...omi.com> Cc: rjw@...ysocki.net, len.brown@...el.com, m.szyprowski@...sung.com, akpm@...ux-foundation.org, mina86@...a86.com, aneesh.kumar@...ux.vnet.ibm.com, iamjoonsoo.kim@....com, hannes@...xchg.org, riel@...hat.com, mgorman@...e.de, minchan@...nel.org, nasa4836@...il.com, ddstreet@...e.org, hughd@...gle.com, mingo@...nel.org, rientjes@...gle.com, peterz@...radead.org, keescook@...omium.org, atomlin@...hat.com, raistlin@...ux.it, axboe@...com, paulmck@...ux.vnet.ibm.com, kirill.shutemov@...ux.intel.com, n-horiguchi@...jp.nec.com, k.khlebnikov@...sung.com, msalter@...hat.com, deller@....de, tangchen@...fujitsu.com, ben@...adent.org.uk, akinobu.mita@...il.com, lauraa@...eaurora.org, vbabka@...e.cz, sasha.levin@...cle.com, vdavydov@...allels.com, suleiman@...gle.com, linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH 1/4] (CMA_AGGRESSIVE) Add CMA_AGGRESSIVE to Kconfig Hi! > Add CMA_AGGRESSIVE config that depend on CMA to Linux kernel config. > Add CMA_AGGRESSIVE_PHY_MAX, CMA_AGGRESSIVE_FREE_MIN and CMA_AGGRESSIVE_SHRINK > that depend on CMA_AGGRESSIVE. > > If physical memory size (not include CMA memory) in byte less than or equal to > CMA_AGGRESSIVE_PHY_MAX, CMA aggressive switch (sysctl vm.cma-aggressive-switch) > will be opened. Ok... Do I understand it correctly that there is some problem with hibernation not working on machines not working on machines with big CMA areas...? But adding 4 config options end-user has no chance to set right can not be the best solution, can it? > +config CMA_AGGRESSIVE_PHY_MAX > + hex "Physical memory size in Bytes that auto turn on the CMA aggressive switch" > + depends on CMA_AGGRESSIVE > + default 0x40000000 > + help > + If physical memory size (not include CMA memory) in byte less than or > + equal to this value, CMA aggressive switch will be opened. > + After the Linux boot, sysctl "vm.cma-aggressive-switch" can control > + the CMA AGGRESSIVE switch. For example... how am I expected to figure right value to place here? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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