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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 |
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| .. | ||
| Makefile.in | ||
| spl-atomic.c | ||
| spl-condvar.c | ||
| spl-cred.c | ||
| spl-err.c | ||
| spl-generic.c | ||
| spl-kmem-cache.c | ||
| spl-kmem.c | ||
| spl-kobj.c | ||
| spl-kstat.c | ||
| spl-mutex.c | ||
| spl-proc.c | ||
| spl-rwlock.c | ||
| spl-taskq.c | ||
| spl-thread.c | ||
| spl-tsd.c | ||
| spl-vmem.c | ||
| spl-vnode.c | ||
| spl-xdr.c | ||
| spl-zlib.c | ||