On Thu, Aug 28, 2014 at 10:37:04AM -0400, Rob Harris wrote: > > This tells me (probably naively) that the kernel is caching the old file > contents. Yes, that's what the page cache is all about. > Is there a way for me to tell the file system that something out-of-band > change a file contents and to force a re-read from the disk? Have your userspace program do an O_DIRECT read. That will discard the page cache and do a direct read from the disk. Cheers, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
