[PATCH] bounce: call flush_dcache_page after bounce_copy_vec
From: Gary King <hidden>
Date: 2010-09-07 20:54:28
Also in:
linux-mm, lkml
Subsystem:
memory management, the rest · Maintainers:
Andrew Morton, Linus Torvalds
I have been seeing problems on Tegra 2 (ARMv7 SMP) systems with HIGHMEM enabled on 2.6.35 (plus some patches targetted at 2.6.36 to perform cache maintenance lazily), and the root cause appears to be that the mm bouncing code is calling flush_dcache_page before it copies the bounce buffer into the bio. The patch below reorders these two operations, and eliminates numerous arbitrary application crashes on my dev system. Gary --