Messages in this thread | | | Subject | Re: mmap() better than read() fro streaming, Was: Re: Streaming disk I/O kills file buffering and makes Linux unusable | Date | Wed, 25 Aug 1999 15:54:39 +0100 (BST) | From | Alan Cox <> |
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> > ptr=mmap(blah) > > mlock(ptr, ...) > > munmap(ptr, len) > > will mlock() automatically cause all pages to be read from the file ? > (I don't think)
> But since I already do an mlockall() at the beginnig, there is no need of > additional mlock()s
From man mlock
All pages which contain a part of the specified memory range are guaranteed be resi- dent in RAM when the mlock system call returns success- fully and they are guaranteed to stay in RAM until the pages are unlocked by munlock or munlockall
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