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mm: memory-failure: make action_result() return int

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Check mf_result in action_result(), only return 0 when MF_RECOVERED,
or return -EBUSY, which will simplify code a bit.

[wangkefeng.wang@huawei.com: v2]
  Link: https://lkml.kernel.org/r/20221024035138.99119-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20221021084611.53765-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2022-10-21 16:46:11 +08:00 committed by Andrew Morton
parent 183a7c5d15
commit b66d00dfeb
1 changed files with 16 additions and 29 deletions
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45
mm/memory-failure.c
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@ -1179,14 +1179,16 @@ static struct page_state error_states[] = {
* "Dirty/Clean" indication is not 100% accurate due to the possibility of
* setting PG_dirty outside page lock. See also comment above set_page_dirty().
*/
static void action_result(unsigned long pfn, enum mf_action_page_type type,
enum mf_result result)
static int action_result(unsigned long pfn, enum mf_action_page_type type,
enum mf_result result)
{
trace_memory_failure_event(pfn, type, result);
num_poisoned_pages_inc();
pr_err("%#lx: recovery action for %s: %s\n",
pfn, action_page_types[type], action_name[result]);
return (result == MF_RECOVERED || result == MF_DELAYED) ? 0 : -EBUSY;
}
static int page_action(struct page_state *ps, struct page *p,
@ -1197,14 +1199,12 @@ static int page_action(struct page_state *ps, struct page *p,
/* page p should be unlocked after returning from ps->action(). */
result = ps->action(ps, p);
action_result(pfn, ps->type, result);
/* Could do more checks here if page looks ok */
/*
* Could adjust zone counters here to correct for the missing page.
*/
return (result == MF_RECOVERED || result == MF_DELAYED) ? 0 : -EBUSY;
return action_result(pfn, ps->type, result);
}
static inline bool PageHWPoisonTakenOff(struct page *page)
@ -1853,8 +1853,7 @@ retry:
flags |= MF_NO_RETRY;
goto retry;
}
action_result(pfn, MF_MSG_UNKNOWN, MF_IGNORED);
return res;
return action_result(pfn, MF_MSG_UNKNOWN, MF_IGNORED);
}
head = compound_head(p);
@ -1880,22 +1879,17 @@ retry:
} else {
res = MF_FAILED;
}
action_result(pfn, MF_MSG_FREE_HUGE, res);
return res == MF_RECOVERED ? 0 : -EBUSY;
return action_result(pfn, MF_MSG_FREE_HUGE, res);
}
page_flags = head->flags;
if (!hwpoison_user_mappings(p, pfn, flags, head)) {
action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
res = -EBUSY;
goto out;
unlock_page(head);
return action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
}
return identify_page_state(pfn, p, page_flags);
out:
unlock_page(head);
return res;
}
#else
@ -2060,16 +2054,13 @@ try_again:
}
res = MF_FAILED;
}
action_result(pfn, MF_MSG_BUDDY, res);
res = res == MF_RECOVERED ? 0 : -EBUSY;
res = action_result(pfn, MF_MSG_BUDDY, res);
} else {
action_result(pfn, MF_MSG_KERNEL_HIGH_ORDER, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_KERNEL_HIGH_ORDER, MF_IGNORED);
}
goto unlock_mutex;
} else if (res < 0) {
action_result(pfn, MF_MSG_UNKNOWN, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_UNKNOWN, MF_IGNORED);
goto unlock_mutex;
}
}
@ -2090,8 +2081,7 @@ try_again:
*/
SetPageHasHWPoisoned(hpage);
if (try_to_split_thp_page(p) < 0) {
action_result(pfn, MF_MSG_UNSPLIT_THP, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_UNSPLIT_THP, MF_IGNORED);
goto unlock_mutex;
}
VM_BUG_ON_PAGE(!page_count(p), p);
@ -2124,8 +2114,7 @@ try_again:
retry = false;
goto try_again;
}
action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_DIFFERENT_COMPOUND, MF_IGNORED);
goto unlock_page;
}
@ -2165,8 +2154,7 @@ try_again:
* Abort on fail: __filemap_remove_folio() assumes unmapped page.
*/
if (!hwpoison_user_mappings(p, pfn, flags, p)) {
action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_UNMAP_FAILED, MF_IGNORED);
goto unlock_page;
}
@ -2174,8 +2162,7 @@ try_again:
* Torn down by someone else?
*/
if (PageLRU(p) && !PageSwapCache(p) && p->mapping == NULL) {
action_result(pfn, MF_MSG_TRUNCATED_LRU, MF_IGNORED);
res = -EBUSY;
res = action_result(pfn, MF_MSG_TRUNCATED_LRU, MF_IGNORED);
goto unlock_page;
}