Messages in this thread Patch in this message | | | Date | Fri, 22 Mar 2002 16:16:34 +1100 | From | Christopher Yeoh <> | Subject | [PATCH] msync writing when MS_INVALIDATE set and memory locked |
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For msync, SUSv2 states that it will fail if:
"[EBUSY] Some or all of the addresses in the range starting at addr and continuing for len bytes are locked, and MS_INVALIDATE is specified."
This check isn't being done. The following patch (against 2.4.19pre4) adds the correct behaviour:
--- linux-2.4.18/mm/filemap.c~ Thu Mar 21 16:04:48 2002 +++ linux-2.4.18/mm/filemap.c Fri Mar 22 15:48:40 2002 @@ -2205,6 +2205,9 @@ int ret = 0; struct file * file = vma->vm_file; + if ( (flags & MS_INVALIDATE) && (vma->vm_flags & VM_LOCKED) ) + return -EBUSY; + if (file && (vma->vm_flags & VM_SHARED)) { ret = filemap_sync(vma, start, end-start, flags); Chris -- cyeoh@au.ibm.com IBM OzLabs Linux Development Group Canberra, Australia - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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