Messages in this thread | | | Date | Mon, 10 Oct 2005 21:46:31 +0800 | From | "Yingchao Zhou" <> | Subject | [RFC]should swap-file opened with O_DIRECT? |
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The sys_swapon system call open the swap-file through filp_open(..., O_RDWR|O_LARGEFILE,...). In this way, I think that the pageout process of anonymous pages finally will write them out through (swap-file)->f_ops->write, and it will result in caches of swapfile. However, swapping only happens when memory is tight. So why not set O_DIRECT? Is there any special reason to keep caches of swapfile? Is the idea right ? Or something misunstood?
Yingchao Zhou yc_zhou@ncic.ac.cn
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