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Wong" Subject: Re: [RFC] Make the memory failure blast radius more precise In-Reply-To: <19ffec14-28c7-fddc-3042-6ccb8d4e83fa@oracle.com> Message-ID: References: <20200623201745.GG21350@casper.infradead.org> <20200623220412.GA21232@agluck-desk2.amr.corp.intel.com> <19ffec14-28c7-fddc-3042-6ccb8d4e83fa@oracle.com> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: D36931804B668 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, 24 Jun 2020, Jane Chu wrote: > Hi, David, > > On 6/23/2020 9:32 PM, David Rientjes wrote: > > I don't want to hijack Matthew's thread which is primarily about DAX, but > > did get intrigued by your concerns about hugetlbfs page poisoning. We can > > fork the thread off here to discuss only the hugetlb application of this > > if it makes sense to you or you'd like to collaborate on it as well. > > hugetlbfs is not supported in DAX, are you planning to add support? > No, sorry, I was replying only about Tony's comment about the current page poisoning behavior for hugetlbfs and brainstorming a way that we could reduce the memory failure blast radius for hugetlb pages if we had the doublemap support that would also be useful for post-copy live migration. It's independent of DAX so I'm happy to fork this topic off into a different thread for the hugetlb discussion.