On Wed, May 11, 2011 at 10:10:41AM +0300, Surbhi Palande wrote: > While the fsstress background writes are busy dirtying the page cache, if a > fsfreeze happens then the background writes should stall. A sync should then > not have any data to sync to the FS. If it does have any data to sync then > sync will cause a deadlock by holding the s_umount write semaphore and waiting > in the wait queue for the FS to thaw, whereas the F.S can never thaw without > getting the s_umount write semaphore. > > Signed-off-by: Surbhi Palande <surbhi.palande@xxxxxxxxxxxxx> Hi Surbhi, Have you tried out Jan Kara's patches? [1/3] fs: Create __block_page_mkwrite() helper passing error values back [2/3] vfs: Block mmapped writes while the fs is frozen [3/3] ext4: Rewrite ext4_page_mkwrite() to return locked page Do these patches fix the problem you've been trying to fix with your patches? I believe they should, but I would appreciate confirmation that with these patches, you're no longer able to reproduce the problem you've been concerned about. Thanks, regards, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
