diff options
author | Brian Behlendorf <[email protected]> | 2014-07-13 14:35:19 -0400 |
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committer | Brian Behlendorf <[email protected]> | 2015-01-16 14:28:05 -0800 |
commit | 92119cc259ee2f9ebde14145f549d6313f557759 (patch) | |
tree | f401b89e39084c21c15049d26951a1e99d4aebef /lib | |
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 'lib')
-rw-r--r-- | lib/libzpool/kernel.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/libzpool/kernel.c b/lib/libzpool/kernel.c index 995f61d05..db50352c5 100644 --- a/lib/libzpool/kernel.c +++ b/lib/libzpool/kernel.c @@ -1275,3 +1275,20 @@ zfs_onexit_cb_data(minor_t minor, uint64_t action_handle, void **data) { return (0); } + +fstrans_cookie_t +spl_fstrans_mark(void) +{ + return ((fstrans_cookie_t) 0); +} + +void +spl_fstrans_unmark(fstrans_cookie_t cookie) +{ +} + +int +spl_fstrans_check(void) +{ + return (0); +} |