Messages in this thread | | | Date | Tue, 26 May 2015 19:22:39 +0900 | From | Sergey Senozhatsky <> | Subject | Re: [FYI] tux3: Core changes |
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On (05/26/15 01:08), Daniel Phillips wrote: > On Tuesday, May 26, 2015 12:09:10 AM PDT, Jan Kara wrote: > > E.g. video drivers (or infiniband or direct IO for that matter) which > >have buffers in user memory (may be mmapped file), grab references to pages > >and hand out PFNs of those pages to the hardware to store data in them... > >If you fork a page after the driver has handed PFNs to the hardware, you've > >just lost all the writes hardware will do. > > Hi Jan, > > The page forked because somebody wrote to it with write(2) or mmap write at > the same time as a video driver (or infiniband or direct IO) was doing io to > it. Isn't the application trying hard to lose data in that case? It would > not need page fork to lose data that way. >
Hello,
is it possible to page-fork-bomb the system by some 'malicious' app?
-ss
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