Re: 2.4.0-test11 ext2 fs corruption

[schwidefsky@de.ibm.com]

>--- drivers/block/ll_rw_blk.c~  Wed Nov 29 01:30:22 2000
>+++ drivers/block/ll_rw_blk.c   Wed Nov 29 01:33:00 2000
>@@ -684,7 +684,7 @@
>        int max_segments = MAX_SEGMENTS;
>        struct request * req = NULL, *freereq = NULL;
>        int rw_ahead, max_sectors, el_ret;
>-       struct list_head *head = &q->queue_head;
>+       struct list_head *head;
>        int latency;
>        elevator_t *elevator = &q->elevator;

head = &q->queue_head is a simple offset calculation in the request
queue structure. Moving this into the spinlock won't change anything,
since q->queue_head isn't a pointer that can change.

Independent of that I can second the observation that test11 can corrupt
ext2 in memory. I think that this is related to the memory management
problems I see but I can't prove it yet.

blue skies,
   Martin

Linux/390 Design & Development, IBM Deutschland Entwicklung GmbH
Schönaicherstr. 220, D-71032 Böblingen, Telefon: 49 - (0)7031 - 16-2247
E-Mail: schwidefsky@de.ibm.com


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