PF_MEMALLOC in wakeup

xfs

PF_MEMALLOC in wakeup_bdflush()

To:	Steve Lord <lord@xxxxxxx>
Subject:	PF_MEMALLOC in wakeup_bdflush()
From:	Marcelo Tosatti <marcelo@xxxxxxxxxxxxxxxx>
Date:	Thu, 1 Feb 2001 22:02:28 -0200 (BRST)
Cc:	linux-xfs@xxxxxxxxxxx
Sender:	owner-linux-xfs@xxxxxxxxxxx

Steve,

I'm looking into the 2.4.1 XFS tree and I noticed you're setting the
PF_MEMALLOC bit in the task flags before calling flush_dirty_buffers(),
inside wakeup_bdflush().

Have you actually seen any oom deadlock caused by flush_dirty_buffers() or
you just added the bit there to be safe?

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