diff options
| author | Brian Behlendorf <[email protected]> | 2014-07-13 14:35:19 -0400 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-01-16 14:28:05 -0800 |
| commit | 92119cc259ee2f9ebde14145f549d6313f557759 (patch) | |
| tree | f401b89e39084c21c15049d26951a1e99d4aebef /module/zfs/zio.c | |
| parent | d958324f97f4668a2a6e4a6ce3e5ca09b71b31d9 (diff) | |
Mark IO pipeline with PF_FSTRANS
In order to avoid deadlocking in the IO pipeline it is critical that
pageout be avoided during direct memory reclaim. This ensures that
the pipeline threads can always make forward progress and never end
up blocking on a DMU transaction. For this very reason Linux now
provides the PF_FSTRANS flag which may be set in the process context.
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/zfs/zio.c')
| -rw-r--r-- | module/zfs/zio.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/module/zfs/zio.c b/module/zfs/zio.c index 9d70b3e59..7c0e6bf7e 100644 --- a/module/zfs/zio.c +++ b/module/zfs/zio.c @@ -1361,7 +1361,11 @@ static zio_pipe_stage_t *zio_pipeline[]; void zio_execute(zio_t *zio) { + fstrans_cookie_t cookie; + + cookie = spl_fstrans_mark(); __zio_execute(zio); + spl_fstrans_unmark(cookie); } __attribute__((always_inline)) |