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lazy-pages: treat ESRCH returned by uffdio_copy as process exit condition

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Newer kernels will report ESRCH when uffdio_copy is attempted when the
process is exiting [1].
We take care of the new errno value and keep ENOSPC for compatibility.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/userfaultfd.c?id=e86b298bebf7e799e4b7232e9135799f1947552e

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
This commit is contained in:
Mike Rapoport 2017-08-14 16:50:00 +03:00 • committed by Andrei Vagin
parent e5d7d71b1e
commit 1f2cc31fd5
1 changed files with 1 additions and 1 deletions
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2
criu/uffd.c
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@ -688,7 +688,7 @@ static int uffd_copy(struct lazy_pages_info *lpi, __u64 address, int nr_pages)
lp_debug(lpi, "uffd_copy: 0x%llx/%ld\n", uffdio_copy.dst, len);
rc = ioctl(lpi->lpfd.fd, UFFDIO_COPY, &uffdio_copy);
if (rc) {
if (errno == ENOSPC) {
if (errno == ENOSPC || errno == ESRCH) {
handle_exit(lpi);
return 0;
}