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At Thu, 20 Dec 2001 11:46:23 -0800, Linus Torvalds wrote: > > The problem is that having buffers doesn't necessarily always mean that > they are valid, nor that _all_ of them are valid. If following sequence occurs, ramdisk_readpage() may clear the valid buffer data. I'm not sure whether this really occurs, but if it does, I think lock_buffer()/unlock_buffer() may be required. CPU1 CPU2 --------------------------------------------------------------------------- call ext2_alloc_branch() call ramdisk_readpage() bh = getblk(); lock_buffer(bh); write data to bh. ramdisk_readpage() if (!buffer_uptodate(bh)) do memset() mark_buffer_uptodate() unlock_buffer(bh); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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