From: "Xu, Yanfei" <yanfei.xu@windriver.com> To: "Russell King (Oracle)" <linux@armlinux.org.uk> Cc: rppt@kernel.org, ardb@kernel.org, linus.walleij@linaro.org, akpm@linux-foundation.org, carver4lio@163.com, tiantao6@hisilicon.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Date: Wed, 19 May 2021 13:32:23 +0800 [thread overview] Message-ID: <b115f727-570d-d3c1-2a5b-01ed89c450dd@windriver.com> (raw) In-Reply-To: <63618f13-07cf-6867-bcb1-7a725e6f3ef4@windriver.com> On 5/19/21 12:39 PM, Xu, Yanfei wrote: > > > On 5/18/21 8:06 PM, Russell King (Oracle) wrote: >> [Please note: This e-mail is from an EXTERNAL e-mail address] >> >> On Tue, May 18, 2021 at 12:29:32PM +0100, Russell King (Oracle) wrote: >>> On Tue, May 18, 2021 at 07:12:54PM +0800, Yanfei Xu wrote: >>>> The value of "vmalloc=" set in cmdline is always 8M more than the value >>>> of "VmallocTotal" in meminfo. When use the "vmalloc=" parameter, user >>>> expect to get the size what they input, and no need to consider the 8M >>>> "hole" hided in codes. This commit make real vmalloc size equal to >>>> value >>>> of "vmalloc=" in cmdline. >>>> >>>> Also, the commit will reduce the size of vmalloc printed in boot >>>> message >>>> by 8M when the size set in cmdline is irrational. >>> >>> Hi, >>> >>> I think I'd like to do several cleanups with this: >>> >>> 1. change vmalloc_min to be an unsigned long. >>> 2. exclude VMALLOC_OFFSET from vmalloc_min, moving it into >>> adjust_lowmem_bounds where vmalloc_min is used. >>> 3. rename vmalloc_min to be vmalloc_start >>> 4. enforce vmalloc_start to be a multiple of 2MiB >>> 5. in early_vmalloc(), calculate vmalloc_max as: >>> VMALLOC_END - (PAGE_OFFSET + SZ_32M + VMALLOC_OFFSET) >>> and use that to set the upper bound of vmalloc_reserve (which is >>> something your patch doesn't do, which I think is a bug. >>> >>> Thoughts? >> >> I've slightly modified the above idea, and will shortly follow up with >> some patches to show the idea a bit better... >> > > Thanks for making it better! > Hi Russell, I am not much familar with community contribution. In this case, what kind of tags should I reply? signed-off-by? Reviewed-by? or any other tags? Regards, Yanfei > Regards, > Yanfei >> -- >> RMK's Patch system: >> https://urldefense.com/v3/__https://www.armlinux.org.uk/developer/patches/__;!!AjveYdw8EvQ!Mz6E44Glfsb6CPijsZ50Ofca9g8UAgL2MRQpaxa18ZTAIrVQpH0IcyqGDwHSWphEoo8$ >> FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! >>
WARNING: multiple messages have this Message-ID (diff)
From: "Xu, Yanfei" <yanfei.xu@windriver.com> To: "Russell King (Oracle)" <linux@armlinux.org.uk> Cc: rppt@kernel.org, ardb@kernel.org, linus.walleij@linaro.org, akpm@linux-foundation.org, carver4lio@163.com, tiantao6@hisilicon.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Date: Wed, 19 May 2021 13:32:23 +0800 [thread overview] Message-ID: <b115f727-570d-d3c1-2a5b-01ed89c450dd@windriver.com> (raw) In-Reply-To: <63618f13-07cf-6867-bcb1-7a725e6f3ef4@windriver.com> On 5/19/21 12:39 PM, Xu, Yanfei wrote: > > > On 5/18/21 8:06 PM, Russell King (Oracle) wrote: >> [Please note: This e-mail is from an EXTERNAL e-mail address] >> >> On Tue, May 18, 2021 at 12:29:32PM +0100, Russell King (Oracle) wrote: >>> On Tue, May 18, 2021 at 07:12:54PM +0800, Yanfei Xu wrote: >>>> The value of "vmalloc=" set in cmdline is always 8M more than the value >>>> of "VmallocTotal" in meminfo. When use the "vmalloc=" parameter, user >>>> expect to get the size what they input, and no need to consider the 8M >>>> "hole" hided in codes. This commit make real vmalloc size equal to >>>> value >>>> of "vmalloc=" in cmdline. >>>> >>>> Also, the commit will reduce the size of vmalloc printed in boot >>>> message >>>> by 8M when the size set in cmdline is irrational. >>> >>> Hi, >>> >>> I think I'd like to do several cleanups with this: >>> >>> 1. change vmalloc_min to be an unsigned long. >>> 2. exclude VMALLOC_OFFSET from vmalloc_min, moving it into >>> adjust_lowmem_bounds where vmalloc_min is used. >>> 3. rename vmalloc_min to be vmalloc_start >>> 4. enforce vmalloc_start to be a multiple of 2MiB >>> 5. in early_vmalloc(), calculate vmalloc_max as: >>> VMALLOC_END - (PAGE_OFFSET + SZ_32M + VMALLOC_OFFSET) >>> and use that to set the upper bound of vmalloc_reserve (which is >>> something your patch doesn't do, which I think is a bug. >>> >>> Thoughts? >> >> I've slightly modified the above idea, and will shortly follow up with >> some patches to show the idea a bit better... >> > > Thanks for making it better! > Hi Russell, I am not much familar with community contribution. In this case, what kind of tags should I reply? signed-off-by? Reviewed-by? or any other tags? Regards, Yanfei > Regards, > Yanfei >> -- >> RMK's Patch system: >> https://urldefense.com/v3/__https://www.armlinux.org.uk/developer/patches/__;!!AjveYdw8EvQ!Mz6E44Glfsb6CPijsZ50Ofca9g8UAgL2MRQpaxa18ZTAIrVQpH0IcyqGDwHSWphEoo8$ >> FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! >> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-05-19 5:33 UTC|newest] Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-18 11:12 [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Yanfei Xu 2021-05-18 11:12 ` Yanfei Xu 2021-05-18 11:29 ` Russell King (Oracle) 2021-05-18 11:29 ` Russell King (Oracle) 2021-05-18 12:06 ` Russell King (Oracle) 2021-05-18 12:06 ` Russell King (Oracle) 2021-05-18 12:15 ` [PATCH 1/4] ARM: change vmalloc_min to be unsigned long Russell King (Oracle) 2021-05-18 12:15 ` Russell King (Oracle) 2021-05-18 22:09 ` Linus Walleij 2021-05-18 22:09 ` Linus Walleij 2021-05-18 12:15 ` [PATCH 2/4] ARM: use a temporary variable to hold maximum vmalloc size Russell King (Oracle) 2021-05-18 12:15 ` Russell King (Oracle) 2021-05-18 22:11 ` Linus Walleij 2021-05-18 22:11 ` Linus Walleij 2021-05-18 12:15 ` [PATCH 3/4] ARM: change vmalloc_min to vmalloc_start Russell King (Oracle) 2021-05-18 12:15 ` Russell King (Oracle) 2021-05-18 22:19 ` Linus Walleij 2021-05-18 22:19 ` Linus Walleij 2021-05-18 22:26 ` Nicolas Pitre 2021-05-18 22:26 ` Nicolas Pitre 2021-05-18 22:32 ` Nicolas Pitre 2021-05-18 22:32 ` Nicolas Pitre 2021-05-18 22:34 ` Linus Walleij 2021-05-18 22:34 ` Linus Walleij 2021-05-18 22:38 ` Nicolas Pitre 2021-05-18 22:38 ` Nicolas Pitre 2021-05-28 9:55 ` Russell King (Oracle) 2021-05-28 9:55 ` Russell King (Oracle) 2021-05-19 4:41 ` Xu, Yanfei 2021-05-19 4:41 ` Xu, Yanfei 2021-05-20 9:00 ` Russell King (Oracle) 2021-05-20 9:00 ` Russell King (Oracle) 2021-05-28 2:52 ` Xu, Yanfei 2021-05-28 2:52 ` Xu, Yanfei 2021-05-28 10:00 ` Russell King (Oracle) 2021-05-28 10:00 ` Russell King (Oracle) 2021-05-19 5:25 ` Xu, Yanfei 2021-05-19 5:25 ` Xu, Yanfei 2021-05-18 12:15 ` [PATCH 4/4] ARM: change vmalloc_start to vmalloc_size Russell King (Oracle) 2021-05-18 12:15 ` Russell King (Oracle) 2021-05-18 22:21 ` Linus Walleij 2021-05-18 22:21 ` Linus Walleij 2021-05-19 4:39 ` [PATCH] arm: make the size of vmalloc in cmdline and meminfo uniform Xu, Yanfei 2021-05-19 4:39 ` Xu, Yanfei 2021-05-19 5:32 ` Xu, Yanfei [this message] 2021-05-19 5:32 ` Xu, Yanfei 2021-05-20 4:52 ` Alexander Dahl 2021-05-20 4:52 ` Alexander Dahl 2021-05-20 6:50 ` Xu, Yanfei 2021-05-20 6:50 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 1/6] ARM: change vmalloc_min to be unsigned long Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 13:10 ` Xu, Yanfei 2021-05-28 13:10 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 2/6] ARM: use a temporary variable to hold maximum vmalloc size Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 13:11 ` Xu, Yanfei 2021-05-28 13:11 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 3/6] ARM: change vmalloc_min to vmalloc_start Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 12:21 ` Linus Walleij 2021-05-28 12:21 ` Linus Walleij 2021-05-28 13:05 ` Xu, Yanfei 2021-05-28 13:05 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 4/6] ARM: change vmalloc_start to vmalloc_size Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 12:22 ` Linus Walleij 2021-05-28 12:22 ` Linus Walleij 2021-05-28 13:15 ` Xu, Yanfei 2021-05-28 13:15 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 5/6] ARM: use "* SZ_1M" rather than "<< 20" Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 12:23 ` Linus Walleij 2021-05-28 12:23 ` Linus Walleij 2021-05-28 13:17 ` Xu, Yanfei 2021-05-28 13:17 ` Xu, Yanfei 2021-05-28 10:11 ` [PATCH v2 6/6] ARM: use MiB for vmalloc sizes Russell King (Oracle) 2021-05-28 10:11 ` Russell King (Oracle) 2021-05-28 12:24 ` Linus Walleij 2021-05-28 12:24 ` Linus Walleij 2021-05-28 13:20 ` Xu, Yanfei 2021-05-28 13:20 ` Xu, Yanfei
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