gwj / at91sam9263 · Commits

Commit 95b134ea02a3e2c2508f907db4ab1379ffdb0bef

Authored by Uri Lublin
Committed by Anthony Liguori
1 parent 76ae317f

migrate.c: migrate_fd_put_buffer: Do not busyloop: stop writing if EWOULDBLOCK 

The migration code is non-blocking, designed for live migration.

Practically migrate_fd_put_buffer busy-loops trying to write, as
on many machines EWOULDBLOCK==EAGAIN (look in include/asm-generic/errno.h).

Signed-off-by: Uri Lublin <uril@redhat.com>
Inline Side-by-side
Showing 1 changed file with 1 additions and 1 deletions
migration.c
  View file @95b134e
@@ -176,7 +176,7 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size) @@ -176,7 +176,7 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
176 176
177 do { 177 do {
178 ret = s->write(s, data, size); 178 ret = s->write(s, data, size);
179 - } while (ret == -1 && ((s->get_error(s)) == EINTR || (s->get_error(s)) == EWOULDBLOCK)); 179 + } while (ret == -1 && ((s->get_error(s)) == EINTR));
180 180
181 if (ret == -1) 181 if (ret == -1)
182 ret = -(s->get_error(s)); 182 ret = -(s->get_error(s));