tree 01cb1c9e3c65deb02c41ed45fa9ad69902274e2c
parent 6f6b5d1ec56acdeab0503d2b823f6f88a0af493e
author Nicholas Bellinger <nab@linux-iscsi.org> 1390188984 +0000
committer Nicholas Bellinger <nab@linux-iscsi.org> 1390633132 +0000

iscsi-target: Fix connection reset hang with percpu_ida_alloc

This patch addresses a bug where connection reset would hang
indefinately once percpu_ida_alloc() was starved for tags, due
to the fact that it always assumed uninterruptible sleep mode.

So now make percpu_ida_alloc() check for signal_pending_state() for
making interruptible sleep optional, and convert iscsit_allocate_cmd()
to set TASK_INTERRUPTIBLE for GFP_KERNEL, or TASK_RUNNING for
GFP_ATOMIC.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: <stable@vger.kernel.org> #3.12+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>