Commit 0d9ee6a2 authored by Andi Kleen's avatar Andi Kleen

HWPOISON: Report correct address granuality for AO huge page errors

The SIGBUS user space signalling is supposed to report the
address granuality of a corruption. Pass this information correctly
for huge pages by querying the hpage order.
Reviewed-by: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
parent a337fdac
......@@ -183,7 +183,7 @@ EXPORT_SYMBOL_GPL(hwpoison_filter);
* signal.
*/
static int kill_proc_ao(struct task_struct *t, unsigned long addr, int trapno,
unsigned long pfn)
unsigned long pfn, struct page *page)
{
struct siginfo si;
int ret;
......@@ -198,7 +198,7 @@ static int kill_proc_ao(struct task_struct *t, unsigned long addr, int trapno,
#ifdef __ARCH_SI_TRAPNO
si.si_trapno = trapno;
#endif
si.si_addr_lsb = PAGE_SHIFT;
si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
/*
* Don't use force here, it's convenient if the signal
* can be temporarily blocked.
......@@ -327,7 +327,7 @@ static void add_to_kill(struct task_struct *tsk, struct page *p,
* wrong earlier.
*/
static void kill_procs_ao(struct list_head *to_kill, int doit, int trapno,
int fail, unsigned long pfn)
int fail, struct page *page, unsigned long pfn)
{
struct to_kill *tk, *next;
......@@ -352,7 +352,7 @@ static void kill_procs_ao(struct list_head *to_kill, int doit, int trapno,
* process anyways.
*/
else if (kill_proc_ao(tk->tsk, tk->addr, trapno,
pfn) < 0)
pfn, page) < 0)
printk(KERN_ERR
"MCE %#lx: Cannot send advisory machine check signal to %s:%d\n",
pfn, tk->tsk->comm, tk->tsk->pid);
......@@ -928,7 +928,7 @@ static int hwpoison_user_mappings(struct page *p, unsigned long pfn,
* any accesses to the poisoned memory.
*/
kill_procs_ao(&tokill, !!PageDirty(hpage), trapno,
ret != SWAP_SUCCESS, pfn);
ret != SWAP_SUCCESS, p, pfn);
return ret;
}
......
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