btrfs: fix the gfp_mask for the reada_zones radix tree
authorChris Mason <clm@fb.com>
Thu, 4 May 2017 23:08:08 +0000 (16:08 -0700)
committerChris Mason <clm@fb.com>
Thu, 4 May 2017 23:56:11 +0000 (16:56 -0700)
commit9bcaaea7418d09691f1ffab5c49aacafe3eef9d0
treede8fb04851d438df09674e02002e28ce8657af76
parentbce19f9d232b71c4eef9ca7d0947035bbb922cef
btrfs: fix the gfp_mask for the reada_zones radix tree

Commits cc8385b59e17 and 7ef70b4d9987a7 added preallocation for the
reada radix trees and also switched them over to GFP_KERNEL for the
default gfp mask.

Since we're doing radix tree insertions under spinlocks, we need
to make sure the mask doesn't allow sleeping.  This fix keeps
the radix preallocation but switches back to the original gfp_mask.

Reported-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/disk-io.c
fs/btrfs/volumes.c