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Date: Thu, 06 Nov 2014 13:50:03 -0800 From: Dave Hansen <dave.hansen@...el.com> To: Thomas Gleixner <tglx@...utronix.de>, Qiaowei Ren <qiaowei.ren@...el.com> CC: "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>, x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org, linux-ia64@...r.kernel.org, linux-mips@...ux-mips.org Subject: Re: [PATCH v9 11/12] x86, mpx: cleanup unused bound tables Instead of all of these games with dropping and reacquiring mmap_sem and adding other locks, or deferring the work, why don't we just do a get_user_pages()? Something along the lines of: while (1) { ret = cmpxchg(addr) if (!ret) break; if (ret == -EFAULT) get_user_pages(addr); } Does anybody see a problem with that? -- 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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