Re: [PATCH 1/9] x86, pkeys: add fault handling for PF_PK page fault bit
From: Mel Gorman <hidden>
Date: 2016-07-07 14:40:40
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linux-api, linux-mm, lkml
On Thu, Jul 07, 2016 at 05:47:20AM -0700, Dave Hansen wrote:
From: Dave Hansen <dave.hansen@linux.intel.com> PF_PK means that a memory access violated the protection key access restrictions. It is unconditionally an access_error() because the permissions set on the VMA don't matter (the PKRU value overrides it), and we never "resolve" PK faults (like how a COW can "resolve write fault). Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
An access fault gets propgated as SEGV_PKUERR. What happens if glibc does not recognise it? -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>