diff options
Diffstat (limited to 'module')
| -rw-r--r-- | module/zfs/zpl_file.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/module/zfs/zpl_file.c b/module/zfs/zpl_file.c index fc2b81329..c2e3a6bdc 100644 --- a/module/zfs/zpl_file.c +++ b/module/zfs/zpl_file.c @@ -354,7 +354,16 @@ zpl_putpage(struct page *pp, struct writeback_control *wbc, void *data) { int error; + /* + * Disable the normal reclaim path for zpl_putpage(). This + * ensures that all memory allocations under this call path + * will never enter direct reclaim. If this were to happen + * the VM might try to write out additional pages by calling + * zpl_putpage() again resulting in a deadlock. + */ + current->flags |= PF_MEMALLOC; error = -zfs_putpage(pp, wbc, data); + current->flags &= ~PF_MEMALLOC; if (error) { SetPageError(pp); |