Messages in this thread Patch in this message | | | From | Christian Borntraeger <> | Subject | Re: [PATCH] rd: Use a private inode for backing storage | Date | Sun, 21 Oct 2007 09:28:58 +0200 |
| |
Am Sonntag, 21. Oktober 2007 schrieb Eric W. Biederman: > Nick. Reread the patch. The only thing your arguments have > established for me is that this patch is not obviously correct. Which > makes it ineligible for a back port. Frankly I suspect the whole > issue is to subtle and rare to make any backport make any sense. My > apologies Christian.
About being rare, when I force the VM to be more aggressive reclaiming buffer by using the following patch: --- linux-2.6.orig/fs/buffer.c +++ linux-2.6/fs/buffer.c @@ -3225,7 +3225,7 @@ void __init buffer_init(void) * Limit the bh occupancy to 10% of ZONE_NORMAL */ nrpages = (nr_free_buffer_pages() * 10) / 100; - max_buffer_heads = nrpages * (PAGE_SIZE / sizeof(struct buffer_head)); + max_buffer_heads = 0; hotcpu_notifier(buffer_cpu_notify, 0); } I can actually cause data corruption within some seconds. So I think the problem is real enough to be worth fixing. I still dont fully understand what issues you have with my patch. - it obviously fixes the problem - I am not aware of any regression it introduces - its small
One concern you had, was the fact that buffer heads are out of sync with struct pages. Testing your first patch revealed that this is actually needed by reiserfs - and maybe others. I can also see, that my patch looks a bit like a bandaid that cobbles the rd pieces together. Is there anything else, that makes my patch unmergeable in your opinion?
Christian
- 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/
| |