The patch titled
Subject: mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix
has been added to the -mm mm-unstable branch. Its filename is
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix
Date: Fri Jul 5 03:12:47 PM PDT 2024
propagate try_grab_folio() retval, including the weird -EREMOTEIO
Cc: SeongJae Park <sj@xxxxxxxxxx>
Cc: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/gup.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
--- a/mm/gup.c~mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix
+++ a/mm/gup.c
@@ -3848,6 +3848,8 @@ long memfd_pin_folios(struct file *memfd
next_idx = 0;
for (i = 0; i < nr_found; i++) {
+ int ret2;
+
/*
* As there can be multiple entries for a
* given folio in the batch returned by
@@ -3860,10 +3862,10 @@ long memfd_pin_folios(struct file *memfd
continue;
folio = page_folio(&fbatch.folios[i]->page);
-
- if (try_grab_folio(folio, 1, FOLL_PIN)) {
+ ret2 = try_grab_folio(folio, 1, FOLL_PIN);
+ if (ret2) {
folio_batch_release(&fbatch);
- ret = -EINVAL;
+ ret = ret2;
goto err;
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix.patch
mm-gup-introduce-memfd_pin_folios-for-pinning-memfd-folios-fix-fix.patch
mm-store-zero-pages-to-be-swapped-out-in-a-bitmap-v7-fix.patch
tools-mm-introduce-a-tool-to-assess-swap-entry-allocation-for-thp_swapout-fix.patch
