Chunwei Chen b4ad50ac5f Use spl_fstrans_mark instead of memalloc_noio_save ...

For earlier versions of the kernel with memalloc_noio_save, it only turns
off __GFP_IO but leaves __GFP_FS untouched during direct reclaim. This
would cause threads to direct reclaim into ZFS and cause deadlock.

Instead, we should stick to using spl_fstrans_mark. Since we would
explicitly turn off both __GFP_IO and __GFP_FS before allocation, it
will work on every version of the kernel.

This impacts kernel versions 3.9-3.17, see upstream kernel commit
torvalds/linux@934f307 for reference.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Closes #515
Issue zfsonlinux/zfs#4111

2015-12-18 13:24:52 -08:00

..

Makefile.in

Support parallel build trees (VPATH builds)

2015-07-17 12:53:11 -07:00

spl-atomic.c

Refresh links to web site

2013-03-04 19:09:34 -08:00

spl-condvar.c

Rename cv_wait_interruptible() to cv_wait_sig()

2015-06-10 16:36:12 -07:00

spl-cred.c

Remove credential configure checks.

2014-10-17 15:11:51 -07:00

spl-err.c

Retire legacy debugging infrastructure

2014-11-19 10:35:07 -08:00

spl-generic.c

Retire spl_module_init()/spl_module_fini()

2015-02-27 13:43:39 -08:00

spl-kmem-cache.c

Use spl_fstrans_mark instead of memalloc_noio_save

2015-12-18 13:24:52 -08:00

spl-kmem.c

Use spl_fstrans_mark instead of memalloc_noio_save

2015-12-18 13:24:52 -08:00

spl-kobj.c

Fix GFP_KERNEL allocations flags

2015-01-21 15:25:19 -08:00

spl-kstat.c

Refactor existing code

2015-01-16 13:55:08 -08:00

spl-mutex.c

Remove adaptive mutex implementation

2014-10-17 15:07:28 -07:00

spl-proc.c

Provide kstat for taskqs

2015-12-16 09:35:22 -08:00

spl-rwlock.c

Refresh links to web site

2013-03-04 19:09:34 -08:00

spl-taskq.c

Use spl_fstrans_mark instead of memalloc_noio_save

2015-12-18 13:24:52 -08:00

spl-thread.c

Retire legacy debugging infrastructure

2014-11-19 10:35:07 -08:00

spl-tsd.c

Fix cstyle issues in spl-tsd.c

2015-04-24 14:23:07 -07:00

spl-vmem.c

Use spl_fstrans_mark instead of memalloc_noio_save

2015-12-18 13:24:52 -08:00

spl-vnode.c

Fix race between getf() and areleasef()

2015-12-03 15:44:47 -08:00

spl-xdr.c

Retire legacy debugging infrastructure

2014-11-19 10:35:07 -08:00

spl-zlib.c

Refactor existing code

2015-01-16 13:55:08 -08:00