Messages in this thread | | | Subject | Re: [PATCH] Fix races in 2.4.2-ac22 SysV shared memory | Date | Fri, 23 Mar 2001 22:20:05 +0000 (GMT) | From | Alan Cox <> |
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> On Fri, 23 Mar 2001, Stephen C. Tweedie wrote: > > > > The patch below is for two races in sysV shared memory. > > + spin_lock (&info->lock); > + > + /* The shmem_swp_entry() call may have blocked, and > + * shmem_writepage may have been moving a page between the page > + * cache and swap cache. We need to recheck the page cache > + * under the protection of the info->lock spinlock. */ > + > + page = find_lock_page(mapping, idx); > > Ehh.. Sleeping with the spin-lock held? Sounds like a truly bad idea.
Umm find_lock_page doesnt sleep does it ?
Alan
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