Messages in this thread | | | From | "Hillf Danton" <> | Subject | Re: [RFC PATCH 1/2] ext4: Fix possible deadlock with local interrupts disabled and page-draining IPI | Date | Fri, 09 Oct 2015 15:19:25 +0800 |
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> @@ -109,8 +109,8 @@ static void ext4_finish_bio(struct bio *bio) > if (bio->bi_error) > buffer_io_error(bh); > } while ((bh = bh->b_this_page) != head); > - bit_spin_unlock(BH_Uptodate_Lock, &head->b_state); > local_irq_restore(flags);
What if it takes 100ms to unlock after IRQ restored?
> + bit_spin_unlock(BH_Uptodate_Lock, &head->b_state); > if (!under_io) { > #ifdef CONFIG_EXT4_FS_ENCRYPTION > if (ctx) > -- > 2.5.0
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