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Message-ID: <53D9D5DD.6030603@codeaurora.org> Date: Thu, 31 Jul 2014 11:06:29 +0530 From: Chintan Pandya <cpandya@...eaurora.org> To: Andrew Morton <akpm@...ux-foundation.org> CC: linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH] mm: BUG when __kmap_atomic_idx crosses boundary On 07/30/2014 02:36 PM, Andrew Morton wrote: > On Wed, 30 Jul 2014 14:22:35 +0530 Chintan Pandya<cpandya@...eaurora.org> wrote: > >> __kmap_atomic_idx>= KM_TYPE_NR or< ZERO is a bug. >> Report it even if CONFIG_DEBUG_HIGHMEM is not enabled. >> That saves much debugging efforts. > > Please take considerably more care when preparing patch changelogs. Okay. I will prepare new commit message. > > kmap_atomic() is a very commonly called function so we'll need much > more detail than this to justify adding overhead to it. > > I don't think CONFIG_DEBUG_HIGHMEM really needs to exist. We could do > s/CONFIG_DEBUG_HIGHMEM/CONFIG_DEBUG_VM/g and perhaps your secret bug > whatever it was would have been found more easily. Um, we didn't get bug directly hitting here. > __kmap_atomic_idx should not be equal to KM_TYPE_NR anyway. So, at least I will share that patch. For changing DEBUG_HIGHMEM to DEBUG_VM, I will work on it. -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- 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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